Performance test system and method for intersatellite network optical terminal

Abstract

The present application discloses a performance test system and method for an intersatellite network optical terminal, which relates to the field of satellite optical communication technology. The test system is applied to the aiming, capturing and tracking test of the network optical terminal to be tested. The test system includes: an optical path switching module, which is used to switch the optical path according to the optical path switching instruction; an intersatellite beam dynamic simulation module is used to receive the test beam emitted by the network optical terminal to be tested through the switched optical path, and simulate and monitor the intersatellite transmission of the test beam; the ground inspection optical terminal is used to generate an auxiliary beam according to the test needs, and send it to the optical terminal through the intersatellite beam dynamic simulation module; the host computer is used to test the network optical terminal to be tested through the intersatellite beam dynamic simulation module, and generate the test results of the network optical terminal to be tested based on the optical axis calibration results, optical path trajectory, and time data. The above test system is used to realize the performance test of the network optical terminal in different scenarios, reduce the difficulty of optical path installation and adjustment of the test system, and improve the test efficiency.

Description

Technical Field

[0001] The present application relates to the field of satellite optical communication technology, and in particular to a performance testing system and method for an inter-satellite networking optical terminal. Background Art

[0002] With the development of low-orbit satellite Internet, satellite optical communication is gradually developing from point-to-point communication to one-to-many networking communication applications. The networking optical terminal carried by the satellite can simultaneously control multiple light beams for aiming, capturing and tracking. In scenarios such as on-orbit calibration, initial link establishment, active and passive (such as solar eclipse, flexible routing switching) link reconstruction, multiple light beams can be collaboratively controlled for scanning and link establishment.

[0003] At present, some ground-based equivalent verification systems for satellite optical communication aiming and tracking technologies can only implement point-to-point link establishment tests, resulting in limited testing functions and low testing efficiency for networking optical terminals in multiple application scenarios.

[0004] Therefore, how to improve the testing efficiency of networking optical transceivers in multiple application scenarios is a problem that needs to be solved urgently. Summary of the invention

[0005] The main purpose of the present application is to provide a performance testing system and method for an inter-satellite networking optical terminal, aiming to solve the technical problems of limited testing functions and low testing efficiency of networking optical terminals in multiple application scenarios.

[0006] To achieve the above-mentioned purpose, the present application proposes a performance test system for an intersatellite networking optical terminal, the test system is applied to the aiming, capturing and tracking test of the networked optical terminal to be tested, the test system comprises: a ground detection optical terminal, an intersatellite beam dynamic simulation module, an optical path switching module and a host computer;

[0007] The host computer is used to respond to the test request, determine the current test scene according to the test request, and generate an optical path switching instruction according to the current test scene;

[0008] The host computer is used to respond to the optical path switching instruction, control the optical path switching module according to the optical path switching instruction, and adjust the parameters of the inter-satellite beam dynamic simulation module according to the current test scenario;

[0009] The optical path switching module is used to switch the optical path according to the optical path switching instruction;

[0010] The inter-satellite beam dynamic simulation module is used to calibrate the optical axis of the test system through the switched optical path to obtain an optical axis calibration result;

[0011] The ground detection optical terminal is used to simulate a communication terminal or a calibration terminal by generating an auxiliary light beam, and send the auxiliary light beam to the network optical terminal to be tested through the inter-satellite light beam dynamic simulation module;

[0012] The inter-satellite beam dynamic simulation module is used to receive the auxiliary beam through the switched optical path, perform inter-satellite beam transmission simulation on the auxiliary beam, obtain an auxiliary simulated beam, and project the auxiliary simulated beam to the networking optical terminal to be tested;

[0013] The inter-satellite beam dynamic simulation module is also used to receive the beam to be tested emitted by the network optical terminal to be tested through the switched optical path, and perform inter-satellite beam transmission simulation on the beam to be tested to obtain the simulated beam to be tested, and project the simulated beam to be tested to the ground detection optical terminal;

[0014] The inter-satellite beam dynamic simulation module is also used to monitor the optical path parameters of the beam to be measured and the auxiliary beam during the emission process, and send the optical path parameters to the host computer, wherein the optical path parameters include the optical path trajectory;

[0015] The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data;

[0016] The host computer is also used to test the networked optical terminal to be tested through the inter-satellite light beam dynamic simulation module, and generate a test result of the networked optical terminal to be tested based on the optical axis calibration result, the light path trajectory, and the time data.

[0017] In one embodiment, the inter-satellite beam dynamic simulation module includes: at least one first inter-satellite beam dynamic simulation module and at least one second inter-satellite beam dynamic simulation module;

[0018] The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested;

[0019] The optical path switching module is used to switch the optical path according to the optical path switching instruction;

[0020] The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal;

[0021] The second inter-satellite beam dynamic simulation module is further used to receive the auxiliary beam emitted by the ground detection optical terminal, and send the auxiliary beam to the first inter-satellite beam dynamic simulation module through the optical path switching module to obtain the auxiliary simulation beam;

[0022] The first inter-satellite beam dynamic simulation module is further used to receive the auxiliary simulation beam emitted by the second inter-satellite beam dynamic simulation module according to the switched optical path, and send the auxiliary simulation beam to the networking optical terminal to be tested.

[0023] In one embodiment, the intersatellite beam dynamic simulation module includes: a collimator, a first fast reflector, a first beam splitter, a second beam splitter, a first coupling optical fiber, a first adjustable optical attenuator, an optical fiber circulator, a power test module, an image sensor, a second adjustable optical attenuator, a first transmitting optical fiber, and a second fast reflector;

[0024] The collimator is used to receive the light beam to be measured or the auxiliary light beam emitted by the network optical terminal to be measured or the ground detection optical terminal through the switched optical path, and focus and shrink the light beam to be measured or the auxiliary light beam to simulate the spatial light beam transmission of the far-field wavefront, obtain a forward first simulated light beam, and project the forward first simulated light beam to the first fast reflection mirror;

[0025] The first fast reflection mirror is used to adjust the direction of the first forward simulated light beam to obtain a second forward simulated light beam, and transmit the second forward simulated light beam to the first beam splitter, wherein the direction adjustment is used to simulate the light beam jitter caused by the vibration of the satellite platform;

[0026] The first beam splitter is used to perform wavelength splitting on the second forward simulated light beam to obtain a third forward simulated light beam, and transmit the third forward simulated light beam to the second beam splitter, wherein the wavelength splitting is used to control the propagation direction of the transmitting and receiving light beams;

[0027] The second beam splitter is used to perform power splitting on the third forward simulated light beam to obtain a fourth forward simulated light beam and a fifth forward simulated light beam, transmit the fourth forward simulated light beam to the image sensor, and transmit the fifth forward simulated light beam to the first coupling optical fiber, and the power splitting is used to split the third forward simulated light beam into the fourth forward simulated light beam and the fifth forward simulated light beam;

[0028] The image sensor is used to obtain the simulated light path trajectory in real time and transmit it to the host computer;

[0029] The first coupling optical fiber is used to receive the fifth forward simulated light beam and transmit the fifth forward simulated light beam to a first adjustable optical attenuator;

[0030] The first adjustable optical attenuator is used to adjust the power of the fifth forward simulated light beam through the power test module to obtain a sixth forward simulated light beam, wherein the power adjustment is used to simulate the attenuation of the intersatellite transmission link, and the sixth forward simulated light beam passes through the optical fiber circulator to perform unidirectional transmission of the optical path;

[0031] The optical fiber circulator is also used to receive the simulated light beam incident from other inter-satellite light beam dynamic simulation modules, obtain the reverse first simulated light beam, and transmit it to the second adjustable optical attenuator;

[0032] The second adjustable optical attenuator is used to adjust the power of the reverse first simulated light beam through the power test module to obtain a reverse second simulated light beam;

[0033] The first transmitting optical fiber is used to receive the reverse second simulated light beam and transmit the reverse second simulated light beam to the second fast reflection mirror;

[0034] The second fast-reflecting mirror is used to adjust the direction of the reverse second simulated light beam to obtain a reverse third simulated light beam, and transmit it to the first beam splitter, wherein the direction adjustment is used to simulate the deviation of the transmitting and receiving pointing angle caused by the relaxation of the light beam in the far-field transmission;

[0035] The first beam splitter is further used to perform wavelength splitting on the reverse third simulated light beam to obtain a reverse fourth simulated light beam, and transmit the reverse fourth simulated light beam to the second beam splitter;

[0036] The first fast-reflecting mirror is further used to adjust the direction of the reverse fourth simulated light beam to obtain a reverse fifth simulated light beam, and transmit it to the network optical terminal to be tested through the parallel light pipe;

[0037] The power testing module is used to monitor the power parameters of the forward fifth simulated light beam and transmit the obtained power parameters to the host computer;

[0038] The host computer is also used to test the networking optical terminal to be tested through the at least one first inter-satellite light beam dynamic simulation module, and generate a test result of the networking optical terminal to be tested based on the optical axis calibration result and the simulated light path trajectory.

[0039] In one embodiment, the current test scene is a multi-beam calibration test scene, the auxiliary beam is a wide beacon beam, and the optical path switching instruction includes a first unilateral switching instruction;

[0040] The host computer is used to switch the optical path switching module to the same ground detection optical terminal according to the first unilateral switching instruction;

[0041] The ground inspection optical terminal is used to simulate the calibration terminal to generate a wide beacon beam, and send the wide beacon beam to the network optical terminal to be tested through the second inter-satellite beam dynamic simulation module and a plurality of the first inter-satellite beam dynamic simulation modules;

[0042] The second inter-satellite beam dynamic simulation module is used to receive the wide beacon beam emitted by the ground detection optical terminal, and send the wide beacon beam to the first inter-satellite beam dynamic simulation module through the optical path switching module to obtain a calibration simulation beam;

[0043] The first inter-satellite beam dynamic simulation module is used to receive the calibration simulation beam emitted by the second inter-satellite beam dynamic simulation module according to the switched optical path, and send the calibration simulation beam to the network optical terminal to be tested;

[0044] The host computer is also used to perform a multi-beam calibration test on the networked optical terminal to be tested through at least two first inter-satellite beam dynamic simulation modules and at least one second inter-satellite beam dynamic simulation module, and generate a calibration test result of the networked optical terminal to be tested based on the optical axis calibration result and the simulated optical path trajectory.

[0045] In one embodiment, the current test scenario is a multi-beam scanning link building test scenario, the auxiliary beam is a narrow beacon beam, and the optical path switching instruction includes a second unilateral switching instruction;

[0046] The host computer is used to switch the optical path switching module to the same ground detection optical terminal according to the second unilateral switching instruction;

[0047] The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested;

[0048] The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal;

[0049] The ground detection optical terminal is used to wait and receive the simulated light beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal to simulate the aiming, capturing and tracking process of the communication terminal;

[0050] The ground detection optical terminal generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second inter-satellite light beam dynamic simulation module and a plurality of the first inter-satellite light beam dynamic simulation modules, wherein the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide a direction, so as to simulate the tracking condition of the networked optical terminal to be tested;

[0051] The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data;

[0052] The host computer is also used to perform a multi-beam scanning link establishment test on the networked optical terminal to be tested through at least two first inter-satellite beam dynamic simulation modules and at least one second inter-satellite beam dynamic simulation module, and generate a multi-beam scanning single-link link establishment test result of the networked optical terminal to be tested based on the optical axis calibration result, the simulated optical path trajectory, and the time data.

[0053] In one embodiment, the current test scenario is a test scenario of simultaneously establishing multiple links and stably tracking, the auxiliary light beam is a narrow beacon light beam, and the optical path switching instruction includes a bilateral switching instruction;

[0054] The host computer is used to switch the optical path switching module to different ground detection optical terminals according to the double-side switching instruction;

[0055] The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested;

[0056] The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal;

[0057] The ground detection optical terminal is used to wait and receive the simulated light beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal to simulate the aiming, capturing and tracking process of the communication terminal;

[0058] The ground detection optical terminal generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second inter-satellite light beam dynamic simulation module and a plurality of the first inter-satellite light beam dynamic simulation modules, wherein the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide a direction, so as to simulate the tracking condition of the networked optical terminal to be tested;

[0059] The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data;

[0060] The host computer is also used to perform simultaneous establishment of multiple links and stable tracking tests on the networked optical terminal to be tested through at least two first inter-satellite light beam dynamic simulation modules and at least two second inter-satellite light beam dynamic simulation modules, and generate simultaneous establishment of multiple links and stable tracking test results for the networked optical terminal to be tested based on the optical axis calibration result, the simulated light path trajectory and the time data.

[0061] In one embodiment, the current test scene is a comprehensive test scene, the auxiliary light beam includes a wide beacon light beam and a narrow beacon light beam, and the light path switching instruction includes a second single-side switching instruction and a double-side switching instruction;

[0062] The host computer is used to switch the optical path to the same ground detection optical terminal through the optical path switching module according to the second unilateral switching instruction after the multi-beam calibration test;

[0063] The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested;

[0064] The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal;

[0065] The ground detection optical terminal is used to wait for receiving the simulated light beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal to simulate the aiming, capturing and tracking process of the communication terminal;

[0066] The ground detection optical terminal generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second inter-satellite light beam dynamic simulation module and a plurality of the first inter-satellite light beam dynamic simulation modules, wherein the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide a direction, so as to simulate the tracking condition of the networked optical terminal to be tested;

[0067] The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data;

[0068] The host computer is further used to perform a multi-beam scanning single-link link building test on the networked optical terminal to be tested through the adjusted inter-satellite beam dynamic simulation module, and generate a multi-beam collaborative scanning link building test result of the networked optical terminal to be tested according to the time data;

[0069] The host computer is used to switch the optical path to different ground detection optical terminals through the optical path switching module according to the double-side switching instruction after the multi-beam collaborative scanning and link building test;

[0070] The test system is also used to perform a simultaneous multi-link establishment and stable tracking test on the current ground detection optical terminal after the optical path switching module switches the optical path to a different ground detection optical terminal, and obtain an updated test result of simultaneous multi-link establishment and stable tracking of the network optical terminal to be tested;

[0071] The host computer is also used to generate a comprehensive test result based on the calibration test results of the networked optical terminal to be tested, the multi-beam collaborative scanning and link building test results, and the updated networked optical terminal to be tested simultaneously establishing multiple links and stably tracking test results.

[0072] To achieve the above-mentioned purpose, the present application proposes a performance test method for an intersatellite networking optical terminal, wherein the test system is applied to the aiming, capturing and tracking test of the tested networking optical terminal, and the test system comprises: a ground detection optical terminal, an intersatellite beam dynamic simulation module, an optical path switching module and a host computer;

[0073] The host computer responds to the test request, determines the current test scenario according to the test request, and generates an optical path switching instruction according to the current test scenario;

[0074] The host computer responds to the optical path switching instruction, controls the optical path switching module according to the optical path switching instruction, and adjusts the parameters of the inter-satellite beam dynamic simulation module according to the current test scenario;

[0075] The optical path switching module switches the optical path according to the optical path switching instruction;

[0076] The inter-satellite beam dynamic simulation module performs optical axis calibration on the test system through the switched optical path to obtain an optical axis calibration result;

[0077] The ground inspection optical terminal generates an auxiliary light beam to simulate a communication terminal or a calibration terminal, and sends the auxiliary light beam to the network optical terminal to be tested through the inter-satellite light beam dynamic simulation module;

[0078] The inter-satellite beam dynamic simulation module receives the auxiliary beam through the switched optical path, performs inter-satellite beam transmission simulation on the auxiliary beam, obtains an auxiliary simulation, and projects the auxiliary simulation to the networking optical terminal to be tested;

[0079] The inter-satellite beam dynamic simulation module also receives the beam to be tested emitted by the network optical terminal to be tested through the switched optical path, performs inter-satellite beam transmission simulation on the beam to be tested, obtains the simulated beam to be tested, and projects the simulated beam to be tested to the ground detection optical terminal;

[0080] The inter-satellite beam dynamic simulation module also monitors the optical path parameters of the measured beam and the auxiliary beam during the emission process, and sends the optical path parameters to the host computer, wherein the optical path parameters include the optical path trajectory;

[0081] The host computer also calculates the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtains the corresponding time data;

[0082] The host computer also tests the networked optical terminal to be tested through the inter-satellite light beam dynamic simulation module, and generates a test result of the networked optical terminal to be tested based on the optical axis calibration result, the light path trajectory, and the time data.

[0083] One or more technical solutions proposed in this application have at least the following technical effects:

[0084] The performance test system of the intersatellite networking optical terminal is applied to the aiming, capturing and tracking test of the networking optical terminal to be tested, and the test system includes: a ground detection optical terminal, an intersatellite light beam dynamic simulation module, an optical path switching module and a host computer; the host computer is used to respond to the test request, determine the current test scene according to the test request, and generate an optical path switching instruction according to the current test scene; the host computer is used to respond to the optical path switching instruction, control the optical path switching module according to the optical path switching instruction, and adjust the parameters of the intersatellite light beam dynamic simulation module according to the current test scene; the optical path switching module is used to switch the optical path according to the optical path switching instruction; the intersatellite light beam dynamic simulation module is used to calibrate the optical axis of the test system through the switched optical path to obtain the optical axis calibration result; the ground detection optical terminal is used to simulate the communication terminal or the calibration terminal by generating an auxiliary light beam, and send the auxiliary light beam to the networking optical terminal to be tested through the intersatellite light beam dynamic simulation module; the intersatellite light beam dynamic simulation module , used to receive the auxiliary beam through the switched optical path, and simulate the transmission of the auxiliary beam between satellites to obtain the auxiliary simulated beam, and project the auxiliary simulated beam to the network optical terminal to be tested; the intersatellite beam dynamic simulation module is also used to receive the test beam emitted by the network optical terminal to be tested through the switched optical path, and simulate the transmission of the test beam between satellites to obtain the simulated beam to be tested, and project the simulated beam to be tested to the ground detection optical terminal; the intersatellite beam dynamic simulation module is also used to monitor the optical path parameters during the emission of the test beam and the auxiliary beam, and send the optical path parameters to the host computer, and the optical path parameters include the optical path trajectory; the host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the precision tracking requirements, and obtain the corresponding time data; the host computer is also used to test the network optical terminal to be tested through the intersatellite beam dynamic simulation module, and generate the test results of the network optical terminal to be tested based on the optical axis calibration results, optical path trajectory, and time data. By changing the input-output mapping relationship of the optical path switching module, the test requirements of different network optical terminal application scenarios can be met. This test system solution can realize test functions that existing test systems cannot realize, including multi-beam calibration of networked optical transceivers, multi-beam collaborative scanning and link establishment, and simultaneous establishment of multiple links and stable tracking of communications, making the test scenario closer to the actual working conditions of networked optical transceivers in orbit. The performance test system of intersatellite networked optical transceivers can realize the performance test of networked optical transceivers in different application scenarios, reducing the number and difficulty of optical path adjustment of the test system in multiple application scenarios, and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0086] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0087] Figure 1 A schematic diagram of a performance test system for an intersatellite network optical terminal in the present application;

[0088] Figure 2 This is a schematic diagram of an intersatellite beam dynamic simulation module of an embodiment of the system of the present application;

[0089] Figure 3 A schematic diagram of an optical path switching module according to an embodiment of the present application;

[0090] Figure 4 This is a schematic diagram of the optical path trajectory of a multi-beam calibration test scene in an embodiment of the method of this application;

[0091] Figure 5 This is a schematic diagram of the optical path trajectory of a multi-beam scanning single link link establishment test scenario in an embodiment of the method of this application;

[0092] Figure 6 A schematic diagram of establishing multiple links simultaneously and stably tracking the optical path trajectory of the test scene in an embodiment of the method of the present application;

[0093] Figure 7 Schematic diagram of the process of three testing methods in the embodiments of the present application;

[0094] Figure 8 Schematic diagram of the flow of the comprehensive testing method in the embodiment of the present application.

[0095] Description of Figure Numbers:

[0096] 1. Intersatellite beam dynamic simulation module; 101. Collimator; 102. First fast reflex mirror; 103. First beam splitter; 104. Image sensor; 105. Second beam splitter; 106. First coupling optical fiber; 107. First adjustable optical attenuator; 108. Optical fiber circulator; 109. Second adjustable optical attenuator; 1010. First transmitting optical fiber; 1011. Second fast reflex mirror; 1012. Power test module; 2. Optical path switching module; 201. First optical switch; 201', second optical switch; 202. First optical fiber coupler; 202', second optical fiber coupler; 3. Host computer; 4. Satellite relative motion pointing change simulator; 5. Optical fiber; 6. Measurement and control cable; 7. Ground inspection optical terminal.

[0097] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0098] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0099] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0100] Since the ground equivalent verification system of the traditional satellite optical communication aiming and tracking technology can only realize point-to-point link building test, it cannot support the test requirements of multi-beam calibration, multi-beam scanning link building, simultaneous establishment of multiple links and stable tracking of communications for networked optical terminals. Some test systems can only perform receiving and transmitting performance tests of multi-target phased array communication terminals by time and link, and cannot support the test requirements of networked optical terminals to simultaneously establish multiple links and stable tracking of communications, resulting in limited test functions and low test efficiency for networked optical terminals in multiple application scenarios. Therefore, how to improve the test efficiency of networked optical terminals in multiple application scenarios is a problem that needs to be solved urgently.

[0101] The present application provides a performance test system for an intersatellite networking optical terminal, the test system is applied to the aiming, capturing and tracking test of the networked optical terminal to be tested, the test system comprises: a ground detection optical terminal, an intersatellite light beam dynamic simulation module, an optical path switching module and a host computer; the host computer is used to respond to a test request, determine the current test scenario according to the test request, and generate an optical path switching instruction according to the current test scenario; the host computer is used to respond to the optical path switching instruction, control the optical path switching module according to the optical path switching instruction, and adjust the parameters of the intersatellite light beam dynamic simulation module according to the current test scenario; the optical path switching module is used to switch the optical path according to the optical path switching instruction; the intersatellite light beam dynamic simulation module is used to calibrate the optical axis of the test system through the switched optical path to obtain the optical axis calibration result; the ground detection optical terminal is used to simulate a communication terminal or a calibration terminal by generating an auxiliary light beam, and send the auxiliary light beam to the networked optical terminal to be tested through the intersatellite light beam dynamic simulation module; The dynamic simulation module is used to receive the auxiliary beam through the switched optical path, simulate the intersatellite beam transmission of the auxiliary beam, obtain the auxiliary simulated beam, and project the auxiliary simulated beam to the network optical terminal to be tested; the intersatellite beam dynamic simulation module is also used to receive the test beam emitted by the network optical terminal to be tested through the switched optical path, simulate the intersatellite beam transmission of the test beam, obtain the simulated beam to be tested, and project the simulated beam to be tested to the ground detection optical terminal; the intersatellite beam dynamic simulation module is also used to monitor the optical path parameters during the emission of the test beam and the auxiliary beam, and send the optical path parameters to the host computer, and the optical path parameters include the optical path trajectory; the host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the precision tracking requirements, and obtain the corresponding time data; the host computer is also used to test the network optical terminal to be tested through the intersatellite beam dynamic simulation module, and generate the test results of the network optical terminal to be tested based on the optical axis calibration results, optical path trajectory, and time data. By changing the input-output mapping relationship of the optical path switching module, the test requirements of different network optical terminal application scenarios can be met. This test system solution can realize test functions that existing test systems cannot realize, including multi-beam calibration of networked optical transceivers, multi-beam collaborative scanning and link establishment, and simultaneous establishment of multiple links and stable tracking of communications, making the test scenario closer to the actual working conditions of networked optical transceivers in orbit. The performance test system of intersatellite networked optical transceivers can realize the performance test of networked optical transceivers in different application scenarios, reducing the number and difficulty of optical path adjustment of the test system in multiple application scenarios, and improving the test efficiency.

[0102] Based on this, the embodiment of the present application provides a performance test system for an inter-satellite network optical terminal. Figure 1 , Figure 1This is a schematic diagram of the performance test system of the intersatellite networking optical terminal of the present application. The test system includes: a ground detection optical terminal 7, an intersatellite light beam dynamic simulation module 1, an optical path switching module 2 and a host computer 3; the host computer 3 is used to respond to a test request, determine the current test scenario according to the test request, and generate an optical path switching instruction according to the current test scenario; the host computer 3 is also used to respond to the optical path switching instruction, control the optical path switching module 2 according to the optical path switching instruction, and adjust the parameters of the intersatellite light beam dynamic simulation module 1 according to the current test scenario; the optical path switching module 2 is used to switch the optical path according to the optical path switching instruction; the intersatellite light beam dynamic simulation module 1 is used to calibrate the optical axis of the test system through the switched optical path to obtain the optical axis calibration result; the ground detection optical terminal 7 is used to simulate a communication terminal or a calibration terminal by generating an auxiliary light beam, and send the auxiliary light beam to the network optical terminal to be tested through the intersatellite light beam dynamic simulation module 1; the intersatellite light beam dynamic simulation module 1 is used to receive the auxiliary light beam through the switched optical path The intersatellite beam dynamic simulation module 1 is also used to receive the test beam emitted by the network optical terminal to be tested through the switched optical path, and to simulate the intersatellite beam transmission on the test beam to obtain the test simulation beam, and to project the test simulation beam to the ground detection optical terminal 7; the intersatellite beam dynamic simulation module 1 is also used to monitor the optical path parameters during the emission of the test beam and the auxiliary beam, and send the optical path parameters to the host computer 3, the optical path parameters including the optical path trajectory; the host computer 3 is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirements, and obtain the corresponding time data; the host computer 3 is also used to test the network optical terminal to be tested through the intersatellite beam dynamic simulation module 1, and generate the test result of the network optical terminal to be tested based on the optical axis calibration result, the optical path trajectory and the time data.

[0103] It should be noted that the test system may also include a satellite relative motion pointing change simulator 4, an optical fiber 5, and a measurement and control cable 6. Among them, the satellite relative motion pointing change simulator 4 is used to simulate the relative angular motion between two satellites, and then simulate the pointing change caused by the relative motion between satellites. Optical fiber 5 can be used as a medium for transmitting optical signals, and may be used to connect various optical elements or modules in the test system to ensure the efficient transmission of optical signals between different components. The measurement and control cable 6 can be used as a cable for transmitting measurement and control signals to ensure that the signal control and information feedback functions between the host computer and various modules (such as the optical path switching module) work normally. The optical path trajectory can be the specific propagation path of the light beam to be measured and the auxiliary light beam after the intersatellite light beam transmission simulation, and the corresponding optical path parameters can include relevant parameters of the light beam to be measured and the auxiliary light beam during the transmission process (such as light intensity, angle, distance, etc.). The beam to be tested can be understood as a beam emitted by the network optical terminal to be tested, and the intersatellite beam transmission simulation is performed through the intersatellite beam dynamic simulation module 1. The auxiliary beam can include a wide beacon beam and a narrow beacon beam. The narrow beacon beam can be understood as a beam emitted by the ground detection optical terminal 7 according to the simulated beam to be tested, which is used to calibrate the network optical terminal to be tested. The wide beacon beam plays a reference role, and the optical parameters in the system can be calibrated through its feedback. The optical axis calibration result is used to adjust the optical axis direction of the network optical terminal to be tested. The optical axis calibration result can reflect the alignment of the device to be tested to ensure that the optical axis of the device is within the standard range. The host computer 3 is the core control terminal of the test system, which is responsible for responding to test requests, generating and sending control instructions (such as optical path switching instructions, simulation adjustment instructions, etc.), receiving data fed back by each module, and finally generating test results. The simulation adjustment instruction can be understood as an instruction generated by the host computer 3 based on the optical axis calibration result, optical path trajectory and other parameters, which is used to adjust the parameters of the intersatellite beam dynamic simulation module 1 to optimize the simulation environment and ensure that the test conditions are close to the real space environment. The test result of the network optical terminal to be tested may be the final test data of the network optical terminal to be tested in a system simulation environment, including the optical axis alignment, transmission accuracy, etc.

[0104] In one embodiment, the intersatellite beam dynamic simulation module includes: at least one first intersatellite beam dynamic simulation module and at least one second intersatellite beam dynamic simulation module; the first intersatellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second intersatellite beam dynamic simulation module through the optical path switching module 2 to obtain the simulated beam to be tested; the optical path switching module is used to switch the optical path according to the optical path switching instruction; the second intersatellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first intersatellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal 7; the second intersatellite beam dynamic simulation module is also used to receive the auxiliary beam emitted by the ground detection optical terminal 7, and send the auxiliary beam to the first intersatellite beam dynamic simulation module through the optical path switching module to obtain the auxiliary simulated beam; the first intersatellite beam dynamic simulation module is also used to receive the auxiliary simulated beam emitted by the second intersatellite beam dynamic simulation module according to the switched optical path, and send the auxiliary simulated beam to the network optical terminal to be tested.

[0105] It should be noted that the internal structure of the first intersatellite beam dynamic simulation module is the same as that of the second intersatellite beam dynamic simulation module. In order to distinguish the direction of the optical path, the first intersatellite beam dynamic simulation module and the second intersatellite beam dynamic simulation module are set here. The first intersatellite beam dynamic simulation module is used to simulate the transmission of the forward simulated beam, and may include multiple intersatellite beam dynamic simulation modules 1. The second intersatellite beam dynamic simulation module is used to simulate the transmission of the reverse simulated beam, and may also include multiple intersatellite beam dynamic simulation modules 1. It can be understood that the first intersatellite beam dynamic simulation module and the second intersatellite beam dynamic simulation module in the present application can both be represented by the intersatellite beam dynamic simulation module 1. Exemplarily, the performance test system of the intersatellite networking optical terminal (such as Figure 1 ) includes multiple intersatellite beam dynamic simulation modules 1, optical path switching modules 2, satellite relative motion pointing change simulator 4, optical fiber 5, measurement and control cable 6, ground detection optical terminal 7, and host computer 3. Among them, the test system can include multiple intersatellite beam dynamic simulation modules 1, which can be represented as A1 to An, B1 to Bn. Similarly, the test system can include multiple ground detection optical terminals 7, represented as T1 to Tn. Exemplarily, the host computer 3 determines the current test scenario according to the test request, and generates an optical path switching instruction according to the current test scenario. At the same time, it responds to the optical path switching instruction and controls the optical path switching module 2 to switch the optical path according to the optical path switching instruction. The networked optical terminal to be tested transmits a light beam into A1 and A2, which is received by B1 and B2; T1 and T2 emit auxiliary light beams, which are divided into two outputs through the optical path switching module 2 and emitted to the networked optical terminal to be tested through B1 and B2 respectively.

[0106] In this embodiment, by changing the input-output mapping relationship of the optical path switching module in the test system, the test requirements of different networking optical terminal application scenarios are met. This test system solution can realize test functions that cannot be realized by existing test systems, including multi-beam calibration of networking optical terminals, multi-beam collaborative scanning and link establishment, and simultaneous establishment of multiple links and stable tracking of communications, so that the test scenario can be closer to the actual working conditions of networking optical terminals in orbit. The performance test system of intersatellite networking optical terminals can realize the performance test of networking optical terminals in different application scenarios, reducing the number and difficulty of optical path adjustment of the test system in multiple application scenarios, and improving the test efficiency.

[0107] Based on the above first embodiment, a second embodiment of the performance test system of the inter-satellite network optical terminal of the present application is proposed. Figure 2 , Figure 2The schematic diagram of the composition of the intersatellite beam dynamic simulation module 1. The intersatellite beam dynamic simulation module 1 includes: a collimator 101, a first fast mirror 102, a first beam splitter 103, a second beam splitter 105, a first coupling fiber 106, a first adjustable optical attenuator 107, an optical fiber circulator 108, a power test module 1012, an image sensor 104, a second adjustable optical attenuator 109, a first transmitting optical fiber 1010, and a second fast mirror 1011; the collimator 101 is used to receive the test beam or auxiliary beam emitted by the test networking optical terminal or the ground detection optical terminal 7 through the switched optical path, and focus and shrink the test beam or auxiliary beam to simulate the spatial beam transmission of the far-field wavefront, obtain the forward first simulated beam, and project the forward first simulated beam to the first a fast-reflecting mirror 102; the first fast-reflecting mirror 102 is used to adjust the direction of the first forward simulated light beam to obtain the second forward simulated light beam, and transmit the second forward simulated light beam to the first beam splitter 103, and the direction adjustment is used to simulate the beam jitter caused by the vibration of the satellite platform; the first beam splitter 103 is used to perform wavelength splitting on the second forward simulated light beam to obtain the third forward simulated light beam, and transmit the third forward simulated light beam to the second beam splitter 105, and the wavelength splitting is used to control the propagation direction of the transmitting and receiving light beams; the second beam splitter 105 is used to perform power splitting on the third forward simulated light beam to obtain the fourth forward simulated light beam and the fifth forward simulated light beam, and transmit the fourth forward simulated light beam to the image sensor 104, and transmit the third forward simulated light beam to the image sensor 104. The fifth simulated light beam is transmitted to the first coupling optical fiber 106, and the power splitting is used to split the forward third simulated light beam into a forward fourth simulated light beam and a forward fifth simulated light beam; the image sensor 104 is used to obtain the simulated light path trajectory in real time and transmit it to the host computer 3; the first coupling optical fiber 106 is used to receive the forward fifth simulated light beam, and transmit the forward fifth simulated light beam to the first adjustable optical attenuator 107; the first adjustable optical attenuator 107 is used to adjust the power of the forward fifth simulated light beam through the power test module 1012 to obtain the forward sixth simulated light beam, and the power adjustment is used to simulate the attenuation of the intersatellite transmission link, and the forward sixth simulated light beam passes through the optical fiber circulator 108 for unidirectional transmission of the optical path; the optical fiber circulator 10 8 is also used to receive the simulated light beam incident from other intersatellite beam dynamic simulation modules, obtain the reverse first simulated light beam, and transmit it to the second adjustable optical attenuator 109; the second adjustable optical attenuator 109 is used to adjust the power of the reverse first simulated light beam through the power test module 1012 to obtain the reverse second simulated light beam; the first transmitting optical fiber 1010 is used to receive the reverse second simulated light beam, and transmit the reverse second simulated light beam to the second fast reflection mirror 1011; the second fast reflection mirror 1011 is used to adjust the direction of the reverse second simulated light beam, obtain the reverse third simulated light beam, and transmit it to the first beam splitter 103, and the direction adjustment is used to simulate the deviation of the transmitting and receiving pointing angle caused by the relaxation of the light beam far-field transmission;The first beam splitter 103 is also used to perform wavelength splitting on the reverse third simulated light beam to obtain the reverse fourth simulated light beam, and transmit it to the second beam splitter 105; the first fast mirror 102 is also used to adjust the direction of the reverse fourth simulated light beam to obtain the reverse fifth simulated light beam, and transmit it to the network optical terminal to be tested through the parallel light pipe 101; the power test module 1012 is used to monitor the power parameters of the forward fifth simulated light beam, and transmit the obtained power parameters to the host computer 3; the host computer 3 is also used to test the network optical terminal to be tested through at least one first inter-satellite beam dynamic simulation module, and generate the test results of the network optical terminal to be tested based on the optical axis calibration result and the simulated optical path trajectory.;

[0108] It should be noted that the optical path switching module 2 (such as Figure 3 The intersatellite beam dynamic simulation module 1 also includes a measurement and control cable 6. The optical axis calibration result can be a receiving and transmitting optical axis reference point obtained by the optical axis calibration. Exemplarily, high-precision corner cube reflectors can be placed at the front end of the parallel light tube 101, the first coupling optical fiber 106 and the first transmitting optical fiber 1010 are respectively connected to the debugging laser light source, the second fast reflection mirror 1011 is adjusted to make the two light spots in the image sensor 104 overlap, and the coordinates of the overlap point are recorded as the receiving and transmitting optical axis reference point of the branch, and the test results of the networked optical terminal to be tested include the test accuracy.

[0109] In this embodiment, the combination of parallel light pipe and beam splitter can accurately simulate the transmission of far-field wavefront and the beam jitter caused by the vibration of satellite platform, and the beam pointing can be finely adjusted with the help of high-precision fast mirror to ensure the alignment accuracy of the optical axis. The deviation of the receiving and transmitting pointing angle caused by the relaxation of the beam far-field transmission can be simulated by pointing adjustment, thus realizing the simulation transmission of inter-satellite beam. The beam power can be adjusted by the adjustable optical attenuator. Furthermore, the power parameters of the simulated beam can be monitored by the power test module, and the parameter information of the simulated beam can be obtained in time. The entire inter-satellite beam dynamic simulation module simulates the optical communication between satellites, providing strong support for the testing of different networking optical terminal application scenarios.

[0110] In one embodiment, the specific composition of the intersatellite beam dynamic simulation module may be different and the simulation functions may be increased or decreased. For example, a delay device may be added to simulate the time delay caused by the far-field transmission of the laser, and a background light simulation device may be added to simulate the influence of the background light when establishing an intersatellite link; the second fast mirror 1011 may be reduced, the deviation of the transmitting and receiving pointing angle caused by the relaxation of the far-field transmission of the light beam to be tested may not be simulated, and the test of the advanced aiming function of the networking optical terminal may not be performed.

[0111] In this embodiment, by adaptively adjusting the specific composition of the inter-satellite light beam dynamic simulation module, the performance test system of the inter-satellite networking optical terminal can be made compatible with the test scenario, thereby meeting various test requirements, enhancing the adaptability and flexibility of the performance test system of the inter-satellite networking optical terminal, making the test more targeted, and further improving the test efficiency.

[0112] Based on the above embodiments and implementation methods, a third embodiment of the performance testing system of the inter-satellite networking optical terminal of the present application is proposed.

[0113] In this embodiment, the current test scenario is a multi-beam calibration test scenario, the auxiliary beam is a wide beacon beam, and the optical path switching instruction includes a first unilateral switching instruction; the host computer 3 is used to switch the optical path switching module 2 to the same ground detection optical terminal according to the first unilateral switching instruction; the ground detection optical terminal 7 is used to simulate the calibration terminal to generate a wide beacon beam, and send the wide beacon beam to the network optical terminal to be tested through the second inter-satellite beam dynamic simulation module and multiple first inter-satellite beam dynamic simulation modules; the second inter-satellite beam dynamic simulation module is used to receive the wide beacon beam emitted by the ground detection optical terminal 7, and send the wide beacon beam to the network optical terminal to be tested. The light beam is sent to the first intersatellite light beam dynamic simulation module through the optical path switching module 2 to obtain a calibration simulation beam; the first intersatellite light beam dynamic simulation module is used to receive the calibration simulation beam emitted by the second intersatellite light beam dynamic simulation module according to the switched optical path, and send the calibration simulation beam to the networked optical terminal to be tested; the host computer 3 is used to perform a multi-beam calibration test on the networked optical terminal to be tested through at least two first intersatellite light beam dynamic simulation modules and at least one second intersatellite light beam dynamic simulation module, and generate the calibration test result of the networked optical terminal to be tested based on the optical axis calibration result and the simulated optical path trajectory.

[0114] For example, Figure 4As shown, the current test scene is a multi-beam calibration test scene, the current test scene is a multi-beam calibration test scene, the auxiliary beam is a wide beacon beam, and the optical path switching instruction includes a first unilateral switching instruction; the host computer 3 is used to switch the first optical switch 201 to the same ground detection optical terminal 7 according to the first unilateral switching instruction; the ground detection optical terminal 7 is used to simulate the calibration terminal to generate a wide beacon beam, and send the wide beacon beam to the parallel light pipe 101, focus and shrink the wide beacon beam to simulate the spatial beam transmission of the far-field wavefront, obtain a forward first simulated beam, and project the forward first simulated beam to the first fast mirror 102; the first fast mirror 102 is used to adjust the direction of the forward first simulated beam to obtain a forward second simulated beam. The forward second simulated light beam is transmitted to the first beam splitter 103, and the directional adjustment is used to simulate the light beam jitter caused by the vibration of the satellite platform; the first beam splitter 103 is used to perform wavelength splitting on the forward second simulated light beam to obtain a forward third simulated light beam, and transmit the forward third simulated light beam to the second beam splitter 105, and the wavelength splitting is used to control the propagation direction of the transmitting and receiving light beams; the second beam splitter 105 is used to perform power splitting on the forward third simulated light beam to obtain a forward fourth simulated light beam and a forward fifth simulated light beam, and transmit the forward fourth simulated light beam to the image sensor 104, and transmit the forward fifth simulated light beam to the first coupling optical fiber 106, and the power splitting is used to split the forward third simulated light beam into the forward fourth simulated light beam and the forward fifth simulated light beam. The fifth simulated light beam; the image sensor 104 is used to obtain the simulated light path trajectory in real time and transmit it to the host computer 3; the first coupling optical fiber 106 is used to receive the forward fifth simulated light beam and transmit the forward fifth simulated light beam to the first adjustable optical attenuator 107; the first adjustable optical attenuator 107 is used to adjust the power of the forward fifth simulated light beam through the power test module 1012 to obtain the forward sixth simulated light beam, the power adjustment is used to simulate the attenuation of the intersatellite transmission link, and the forward sixth simulated light beam passes through the optical fiber circulator 108 for unidirectional transmission of the optical path; the optical fiber circulator 108 is also used to receive the simulated light beam incident from other intersatellite beam dynamic simulation modules, obtain the reverse first simulated light beam, and transmit it to the second adjustable optical attenuator 109; a second adjustable optical attenuator 109, used for adjusting the power of the reverse first simulated light beam through the power test module 1012 to obtain a reverse second simulated light beam; a first transmitting optical fiber 1010, used for receiving the reverse second simulated light beam, and transmitting the reverse second simulated light beam to the second fast reflection mirror 1011; the second fast reflection mirror 1011, used for adjusting the direction of the reverse second simulated light beam, obtaining a reverse third simulated light beam, and transmitting it to the first beam splitter 103, the direction adjustment is used to simulate the deviation of the transmitting and receiving pointing angle caused by the relaxation of the light beam far-field transmission; the first beam splitter 103, further used for wavelength splitting the reverse third simulated light beam, obtaining a reverse fourth simulated light beam, and transmitting it to the second beam splitter 105;The first fast mirror 102 is also used to adjust the direction of the reverse fourth simulated light beam to obtain the reverse fifth simulated light beam, and transmit it to the network optical terminal to be tested through the collimator 101; the power test module 1012 is used to monitor the power parameters of the forward fifth simulated light beam, and transmit the obtained power parameters to the host computer 3; the host computer 3 is used to generate the calibration test results of the network optical terminal to be tested based on the optical axis calibration results and the simulated optical path trajectory. It can be understood that the calibration test results include tracking accuracy.;

[0115] It should be noted that the first unilateral switching instruction can be used in a multi-beam calibration test scenario. The optical path switching module 2 includes a first optical switch 201 and a first fiber coupler 202. The first optical switch 201 is used to switch the optical path. The first fiber coupler 202 can efficiently merge or distribute multiple optical signals to different optical fibers. The first adjustable optical attenuator 107 and the second adjustable optical attenuator 109 simulate the attenuation of the intersatellite transmission link. The first coupling optical fiber 106 is used to simulate the distribution of the light field propagated over long distances and received by a relatively small-diameter terminal. The first transmitting optical fiber 1010 is used to direct the light beam. The measurement and control cable 6 is used to transmit control instructions and feedback data, connecting the host computer 3 and various optical components to achieve real-time control of the system and data feedback. Combined with Figure 1, exemplarily, the first optical switch 201 and the second optical switch 201' of the optical path switching module 2 are both turned to the same ground detection optical terminal (T1), and the optical axis calibration is performed on the two light receiving and light paths connected to T1 by the two aiming and tracking modules M1 and M2 of the networked optical terminal. During calibration, a high-precision corner cube reflector is placed at the front end of the parallel light tube, and the debugging laser light source is connected through the first coupling optical fiber 106 and the first transmitting optical fiber 1010. The second fast reflection mirror 1011 is adjusted to make the two light spots in the image sensor 104 overlap, and the coordinates of the overlap point are recorded as the reference point of the light receiving and light axis of the branch. Next, the power detection is performed on the two light receiving and light paths connected to T1 by M1 and M2, and the far-field transmission attenuation of spatial light is simulated by adjusting the first adjustable optical attenuator 107 of B1 and the second adjustable optical attenuators 109 of A1 and A2. Then, the first fast mirror 102 of B1 is turned on to simulate the jitter of the calibration laser pointing angle caused by atmospheric deflection, and the jitter of the pointing angle of the wide beacon beam is monitored by the image sensor 104, and the host computer of the test system displays the light spot trajectory; the second fast mirrors 1011 of A1 and A2 are turned on to simulate the deviation of the receiving and transmitting pointing angle caused by the relaxation of the wide beacon beam in the far field transmission. Considering that the divergence angle of the emission beam of the calibration terminal (such as the ground detection optical terminal 7 in the multi-beam calibration test scenario) is sufficient to cover the uncertainty range of the terminal to be calibrated (such as the networked optical terminal to be tested in the multi-beam calibration test scenario), T1 emits a beam stare to provide calibration laser. The two aiming and tracking modules M1 and M2 of the networked optical terminal to be tested randomly deviate from the calibration optical axis of the test system within the uncertainty range of the simulated calibration terminal (such as T1), and scan all ground detection optical terminals using the field of view scanning method. M1 and M2 capture the calibration laser in turn, perform rough tracking respectively, and then perform fine tracking. Finally, M1 and M2 use the same calibration laser to calibrate the receiving optical axis of the aiming and tracking module respectively, record the center coordinates of the receiving light spot as the reference point of the aiming and tracking module, and complete the calibration of multiple receiving optical axes in the same reference system.

[0116] In this embodiment, the combination of collimator and beam splitter can accurately simulate the transmission of far-field wavefront and the beam jitter caused by the vibration of satellite platform, and finely adjust the beam pointing with the help of high-precision fast mirror to ensure the alignment accuracy of the optical axis. The deviation of the receiving and transmitting pointing angle caused by the relaxation of the beam far-field transmission can be simulated by pointing adjustment, thus realizing the simulation transmission of inter-satellite beam. By recording the optical axis calibration results and automatically generating the calibration test results of the network optical terminal to be tested, accurate reference data is provided for subsequent analysis and performance evaluation.

[0117] Based on the above embodiments and implementation methods, a fourth embodiment of the performance testing system of the inter-satellite networking optical terminal of the present application is proposed.

[0118] In this embodiment, the current test scenario is a multi-beam scanning single-link link building test scenario, the auxiliary beam is a narrow beacon beam, and the optical path switching instruction includes a second unilateral switching instruction; the host computer 3 is used to switch the optical path switching module 2 to the same ground detection optical terminal 7 according to the second unilateral switching instruction; the first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the networked optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module 2 to obtain the simulated beam to be tested; the second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal 7; the ground detection optical terminal 7 is used to wait and receive the simulated beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal 7 to simulate the communication terminal The aiming, capturing and tracking process; the ground detection optical terminal 7 generates a narrow beacon beam according to the simulated beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second intersatellite beam dynamic simulation module and multiple first intersatellite beam dynamic simulation modules, and the narrow beacon beam is used to guide the beam to be tested emitted by the networked optical terminal to provide direction to simulate the tracking condition of the networked optical terminal to be tested; the host computer 3 is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the precise tracking requirements, and obtain the corresponding time data; the host computer 3 is also used to perform a multi-beam scanning link establishment test on the networked optical terminal to be tested through at least two first intersatellite beam dynamic simulation modules and at least one second intersatellite beam dynamic simulation module, and generate a multi-beam scanning single-link link establishment test result of the networked optical terminal to be tested based on the optical axis calibration result, the simulated optical path trajectory, and the time data.

[0119] For example, Figure 5As shown, the current test scenario is a multi-beam scanning single-link link building test scenario, the auxiliary beam is a narrow beacon beam, and the optical path switching instruction includes a second unilateral switching instruction; the host computer 3 is used to switch the optical path switching module 2 to the same ground detection optical terminal 7 according to the second unilateral switching instruction; the parallel light tube 101 is used to receive the test beam emitted by the network optical terminal to be tested through the switched optical path, and focus and shrink the test beam to simulate the spatial beam transmission of the far-field wavefront, obtain the forward first simulated beam, and project the forward first simulated beam to the first fast mirror 102; the first fast mirror 102 is used to adjust the direction of the forward first simulated beam to obtain the forward second simulated beam, and transmit the forward second simulated beam to The first beam splitter 103 is used for directional adjustment to simulate the beam jitter caused by the vibration of the satellite platform; the first beam splitter 103 is used for wavelength splitting the second forward simulated beam to obtain the third forward simulated beam, and transmit the third forward simulated beam to the second beam splitter 105, and the wavelength splitting is used to control the propagation direction of the receiving and transmitting beams; the second beam splitter 105 is used for power splitting the third forward simulated beam to obtain the fourth forward simulated beam and the fifth forward simulated beam, and transmit the fourth forward simulated beam to the image sensor 104, and transmit the fifth forward simulated beam to the first coupling optical fiber 106, and the power splitting is used to split the third forward simulated beam into the fourth forward simulated beam and the fifth forward simulated beam; the image sensor 104, used to obtain the simulated optical path trajectory in real time and transmit it to the host computer 3; the first coupling optical fiber 106, used to receive the fifth forward simulated light beam, and transmit the fifth forward simulated light beam to the first adjustable optical attenuator 107; the first adjustable optical attenuator 107, used to adjust the power of the fifth forward simulated light beam through the power test module 1012, to obtain the sixth forward simulated light beam, the power adjustment is used to simulate the attenuation of the intersatellite transmission link, the sixth forward simulated light beam passes through the optical fiber circulator 108 for unidirectional transmission of the optical path; the optical fiber circulator 108 is also used to receive the simulated light beam incident from other intersatellite beam dynamic simulation modules, obtain the first reverse simulated light beam, and transmit it to the second adjustable optical attenuator 109; The second adjustable optical attenuator 109 is used to adjust the power of the reverse first simulated light beam through the power test module 1012 to obtain the reverse second simulated light beam; the first transmitting optical fiber 1010 is used to receive the reverse second simulated light beam and transmit the reverse second simulated light beam to the second fast reflection mirror 1011; the second fast reflection mirror 1011 is used to adjust the direction of the reverse second simulated light beam to obtain the reverse third simulated light beam, and transmit it to the first beam splitter 103, and the direction adjustment is used to simulate the deviation of the transmitting and receiving direction angle caused by the relaxation of the light beam far-field transmission; the first beam splitter 103 is also used to perform wavelength splitting on the reverse third simulated light beam to obtain the reverse fourth simulated light beam, and transmit it to the second beam splitter 105;The first fast-reflection mirror 102 is also used to adjust the direction of the reverse fourth simulated light beam to obtain a reverse fifth simulated light beam, and transmit it to the ground detection optical terminal 7 through the parallel light tube 101. At this time, the reverse fifth simulated light beam can be understood as the simulated light beam to be tested. The ground detection optical terminal 7 is used to wait and receive the simulated light beam to be tested through field gaze. The field gaze is used for the ground detection optical terminal 7 to simulate the aiming, capturing and tracking process of the communication terminal; the ground detection optical terminal 7 generates a narrow beacon beam according to the simulated light beam to be tested, and uses the narrow beacon beam to receive the light beam to be tested from the networked optical terminal to be tested through the switched optical path through the parallel light tube 101, and focuses and shrinks the light beam to be tested to simulate the spatial beam transmission of the far-field wavefront, obtain the forward first simulated light beam, and project the forward first simulated light beam to the first fast-reflection mirror 102; the first fast-reflection mirror 102 is used to adjust the direction of the forward first simulated light beam to obtain the forward second simulated light beam, and project the forward first simulated light beam to the first fast-reflection mirror 102; the first fast-reflection mirror 102 is used to adjust the direction of the forward first simulated light beam to obtain the forward second simulated light beam, and project the forward first simulated light beam to the first fast-reflection mirror 102. The forward second simulated light beam is transmitted to the first beam splitter 103, and the pointing adjustment is used to simulate the light beam jitter caused by the vibration of the satellite platform; the first beam splitter 103 is used to perform wavelength splitting on the forward second simulated light beam to obtain a forward third simulated light beam, and transmit the forward third simulated light beam to the second beam splitter 105, and the wavelength splitting is used to control the propagation direction of the transmitting and receiving light beams; the second beam splitter 105 is used to perform power splitting on the forward third simulated light beam to obtain a forward fourth simulated light beam and a forward fifth simulated light beam, and transmit the forward fourth simulated light beam to the image sensor 104, and transmit the forward fifth simulated light beam to the first coupling optical fiber 106, and the power splitting is used to transmit the forward third ... third simulated light beam to the image sensor 104, and transmit the forward fifth simulated light beam to the first coupling optical fiber 106, and the power splitting is used to transmit the forward third simulated light beam to the image sensor 104, and transmit the forward third simulated light beam to the image sensor 104, and transmit the forward third simulated light beam to the image sensor 104, and transmit the forward third simulated light beam to the image sensor 104, and transmit the forward third simulated light beam to the image sensor 104, and transmit the forward third simulated light beam to the image sensor 104 The beam is split into a fourth forward simulation beam and a fifth forward simulation beam; an image sensor 104 is used to obtain the simulated optical path trajectory in real time and transmit it to the host computer 3; a first coupling optical fiber 106 is used to receive the fifth forward simulation beam and transmit the fifth forward simulation beam to the first adjustable optical attenuator 107; the first adjustable optical attenuator 107 is used to adjust the power of the fifth forward simulation beam through the power test module 1012 to obtain the sixth forward simulation beam, and the power adjustment is used to simulate the attenuation of the intersatellite transmission link, and the sixth forward simulation beam passes through the optical fiber circulator 108 for unidirectional transmission of the optical path; the optical fiber circulator 108 is also used to receive other intersatellite beams for dynamic simulation The module receives the incident simulated light beam, obtains the reverse first simulated light beam, and transmits it to the second adjustable optical attenuator 109; the second adjustable optical attenuator 109 is used to adjust the power of the reverse first simulated light beam through the power test module 1012 to obtain the reverse second simulated light beam; the first transmitting optical fiber 1010 is used to receive the reverse second simulated light beam, and transmit the reverse second simulated light beam to the second fast reflection mirror 1011; the second fast reflection mirror 1011 is used to adjust the direction of the reverse second simulated light beam, obtain the reverse third simulated light beam, and transmit it to the first beam splitter 103, and the direction adjustment is used to simulate the deviation of the transmitting and receiving direction angle caused by the relaxation of the light beam in the far field transmission;The first beam splitter 103 is also used to perform wavelength splitting on the reverse third simulated light beam to obtain a reverse fourth simulated light beam, and transmit it to the second beam splitter 105; the first fast mirror 102 is also used to adjust the direction of the reverse fourth simulated light beam to obtain a reverse fifth simulated light beam, and transmit it to the dynamic simulation module through the parallel light pipe 101 to send it to the network optical terminal to be tested. At this time, the emitted reverse fifth simulated light beam can be understood as a simulated light beam of a narrow beacon beam, which is used to guide the test light beam emitted by the network optical terminal to provide direction, so as to simulate the tracking of the network optical terminal to be tested. Tracking conditions; the host computer 3 is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirements, and obtain the corresponding time data; the host computer 3 is also used to perform a multi-beam scanning link establishment test on the network optical terminal to be tested through at least two first inter-satellite beam dynamic simulation modules and at least one second inter-satellite beam dynamic simulation module, and generate a multi-beam scanning single-link link establishment test result of the network optical terminal to be tested based on the optical axis calibration result, the simulated optical path trajectory, and the time data. It can be understood that the multi-beam scanning single-link link establishment test result includes the link establishment time and tracking accuracy. ;

[0120] Exemplary, combined Figure 1The networking optical terminal uses two light beams to perform multi-beam scanning to establish a link. The multi-beam scanning single-link link establishment test method includes: the first optical switch 201 and the second optical switch 201' of the optical path switching module are both turned to the same ground detection optical terminal (such as T2); the optical axis of the two receiving and transmitting light paths connected to the two aiming and tracking modules M1 and M2 of the networking optical terminal and T2 are calibrated; a high-precision corner cone reflector is placed at the front end of the parallel light tube, the first coupling optical fiber 106 and the first transmitting optical fiber 1010 are respectively connected to the debugging laser light source, and the second fast reflection mirror 1011 is adjusted to make the two light spots in the image sensor 104 overlap, and the coordinates of the overlap point are recorded as the receiving and transmitting light axis reference point of the branch. The test system adjusts the link simulation parameters, performs power detection on the two light receiving and transmitting paths connected to T2 by the two aiming and tracking modules M1 and M2 of the networked optical terminal, and adjusts the corresponding adjustable optical attenuators (the second adjustable optical attenuator 109 of B2 and the second adjustable optical attenuators 109 of A1 and A2) to simulate the far-field transmission attenuation of spatial light; then the first fast reflex mirrors 102 of A1, A2 and B2 are turned on to simulate the jitter of the transmitting laser pointing angle caused by the vibration of the satellite platform, and the second fast reflex mirror 1011 is turned on to test the deviation of the transmitting and receiving pointing angle caused by the relaxation of the far-field transmission of the simulated light beam, and the image sensor 104 monitors the transmitting laser pointing and presents the light spot trajectory on the host computer 3 of the test system. Considering that the transmission beam divergence angle of the communication terminal to be established (ground inspection optical terminal 7 in the multi-beam scanning link building scenario) is insufficient, while the field of view angle is sufficient to cover the uncertainty range of the terminal to be calibrated (such as the networking optical terminal to be tested in the multi-beam scanning link building scenario), T2 randomly deviates from the calibration optical axis of the test system according to the uncertainty range of the simulated networking optical terminal (such as the networking optical terminal to be tested in the multi-beam scanning link building scenario), and uses the field of view for staring. The two aiming and tracking modules M1 and M2 of the networking optical terminal to be tested randomly deviate from the calibration optical axis of the test system according to the uncertainty range of the simulated communication terminal to be established (such as T2), and respectively transmit beams to scan T2. T2 captures the light beam of the networking optical terminal, determines the direction of the light beam of the networking optical terminal and reflects the light beam; the fields of view of the two aiming and tracking modules M1 and M2 of the networking optical terminal to be tested successively capture the laser of the ground detection optical terminal and perform rough tracking respectively; the image sensors 104 of A1 and A2 monitor the direction of the emitted laser, and the host computer 3 of the test system calculates and presents the tracking accuracy. The two aiming and tracking modules M1 and M2 of the networking optical terminal to be tested respectively perform fine tracking, the image sensors 104 of A1 and A2 monitor the direction of the emitted laser, and the host computer 3 of the test system calculates and presents the tracking accuracy. Finally, the two aiming and tracking modules M1 and M2 of the networking optical terminal to be tested complete the multi-beam collaborative scanning link establishment and stabilize the tracking link; the host computer 3 of the test system calculates the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirements, and presents the tracking accuracy of A1 and A2.

[0121] In this embodiment, through the field of view staring function of the ground inspection optical terminal, the system can simulate the uncertainty of the optical axis of the communication terminal to be established, so that the system can still maintain the connection and stable tracking of the link when the optical axis deviation is large. The system can perform multi-beam scanning single-link link establishment test on the network optical terminal to be tested in a realistic transmission environment, and generate accurate test results in combination with precise power, pointing and time monitoring, thereby improving the performance evaluation accuracy and test efficiency of the intersatellite network optical terminal.

[0122] Based on the above embodiments and implementation methods, a fifth embodiment of the performance testing system of the inter-satellite networking optical terminal of the present application is proposed.

[0123] In this embodiment, the current test scenario is to simultaneously establish multiple links and stably track the test scenario, the auxiliary light beam is a narrow beacon light beam, and the optical path switching instruction includes a bilateral switching instruction; the upper computer 3 is used to switch the optical path switching module 2 to different ground detection optical terminals 7 according to the bilateral switching instruction; the first inter-satellite light beam dynamic simulation module is used to receive the light beam to be tested emitted by the networked optical terminal to be tested, and send the light beam to be tested to the second inter-satellite light beam dynamic simulation module through the optical path switching module 2 to obtain the simulated light beam to be tested; the second inter-satellite light beam dynamic simulation module is used to receive the simulated light beam to be tested emitted by the first inter-satellite light beam dynamic simulation module according to the switched optical path, and send the simulated light beam to be tested to the ground detection optical terminal 7; the ground detection optical terminal 7 is used to wait and receive the simulated light beam to be tested through field gaze, and the field gaze is used for the ground detection optical terminal 7 to simulate the aiming and capture of the communication terminal Tracking process: the ground detection optical terminal 7 generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second intersatellite light beam dynamic simulation module and multiple first intersatellite light beam dynamic simulation modules. The narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide direction to simulate the tracking condition of the networked optical terminal to be tested; the host computer 3 is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the precise tracking requirements, and obtain the corresponding time data; the host computer 3 is also used to perform simultaneous establishment of multiple links and stable tracking tests on the networked optical terminal to be tested through at least two first intersatellite light beam dynamic simulation modules and at least two second intersatellite light beam dynamic simulation modules, and generate simultaneous establishment of multiple links and stable tracking test results for the networked optical terminal to be tested based on the optical axis calibration results, the simulated light path trajectory and the time data.

[0124] It should be noted that when the test scenario is to establish multiple links and track the test scenario stably at the same time, the transmission mode of the light beam in the inter-satellite light beam dynamic simulation module 1 is consistent with the transmission mode of the light beam in the inter-satellite light beam dynamic simulation module 1 in the fifth embodiment, but the light path changes with the change of the light path switching module, which will not be described in detail here. Figure 6 As shown. For example, Figure 1To illustrate, the networking optical terminal uses two light beams to simultaneously establish two links and stably track the communication. The two optical switches (the first optical switch 201 and the second optical switch 201') of the optical path switching module are respectively turned to the two ground detection optical terminals, and the optical axis calibration is performed on the two receiving and transmitting light paths connected to the two aiming and tracking modules of the networking optical terminal and the ground detection optical terminal. The test system adjusts the link simulation parameters: the power of the four receiving and transmitting light paths connected to the aiming and tracking modules (M1, M2) used for link establishment of the networking optical terminal and the ground detection optical terminal (T1, T2) is detected, and the corresponding adjustable optical attenuators (the first adjustable optical attenuator 107 and the second adjustable optical attenuator 109 of A1, A2, B1, B2) are adjusted to simulate the far-field transmission attenuation of spatial light; thereafter, the first fast reflection mirror 102 of A1, A2, B1, B2 is turned on to simulate the transmission laser pointing angle jitter caused by the vibration of the satellite platform, and the second fast reflection mirror 1011 is tested to simulate the transmission and receiving pointing angle deviation caused by the relaxation of the far-field transmission of the light beam. Considering the situation that the transmission beam divergence angle of the communication terminal to be established (the ground detection optical terminal 7 in the test scenario of establishing multiple links and stable tracking) is insufficient, but the field of view angle is sufficient to cover the uncertainty range of the terminal to be calibrated (the networked optical terminal to be tested in the test scenario of establishing multiple links and stable tracking), the two ground detection optical terminals randomly deviate from the calibration optical axis of the test system according to the uncertainty range of the simulated networked optical terminal (such as the networked optical terminal to be tested in the test scenario of establishing multiple links and stable tracking), and use the field of view for staring. The two aiming and tracking modules M1 and M2 of the networked optical terminal to be tested randomly deviate from the calibration optical axis of the test system according to the uncertainty range of the two simulated communication terminals to be established (such as T1 and T2), and respectively transmit light beams to scan the ground detection optical terminal; the image sensors 104 of A1, A2, B1, and B2 monitor the direction of the transmitted laser and present the light spot trajectory on the host computer 3 of the test system. T1 and T2 respectively capture the beam of the networked optical terminal, determine the direction of the beam of the networked optical terminal, and reflect the beam. The two aiming, capturing and tracking modules M1 and M2 of the networked optical terminal to be tested respectively capture the laser of the ground detection optical terminal in the field of view and perform rough tracking respectively; the image sensors 104 of A1 and A2 monitor the direction of the emitted laser, and the host computer 3 calculates and presents the tracking accuracy. The two aiming, capturing and tracking modules of the networked optical terminal to be tested respectively perform fine tracking. The two aiming, capturing and tracking modules of the networked optical terminal to be tested complete the test of establishing two links at the same time and stably tracking the communication. The host computer 3 calculates and presents the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirements, and simultaneously presents the tracking accuracy of the two links.

[0125] In this embodiment, through the double-sided switching instructions, the test system can flexibly switch to different ground detection optical terminals to achieve the synchronous establishment and tracking test of the networked optical terminal to be tested and multiple links. The multi-link parallel test function simulates the complex scenarios in actual intersatellite communications, making the test more representative and practical. At the same time, the field of view staring function of the ground detection optical terminal allows the system to be tested under conditions of uncertain optical axis deviation, increasing the test range and applicability of the system, and achieving precision calibration and stable tracking in the multi-beam multi-link link establishment and tracking test scenario, providing important support for the performance evaluation and optimization of intersatellite optical communication equipment.

[0126] Based on the above embodiments and implementation modes, a sixth embodiment of the performance testing system of the inter-satellite networking optical terminal of the present application is proposed.

[0127] In this embodiment, the current test scene is a comprehensive test scene, the auxiliary light beam includes a wide beacon beam and a narrow beacon beam, and the optical path switching instruction includes a second unilateral switching instruction and a bilateral switching instruction; the host computer 3 is used to switch the optical path to the same ground detection optical terminal 7 through the optical path switching module 2 according to the second unilateral switching instruction after the multi-beam calibration test; the first inter-satellite light beam dynamic simulation module is used to receive the light beam to be tested emitted by the networked optical terminal to be tested, and send the light beam to be tested to the second inter-satellite light beam dynamic simulation module through the optical path switching module 2 to obtain the simulated light beam to be tested; the second inter-satellite light beam dynamic simulation module is used to receive the simulated light beam to be tested emitted by the first inter-satellite light beam dynamic simulation module according to the switched light path, and send the simulated light beam to be tested to the ground detection optical terminal 7; the ground detection optical terminal 7 is used to wait by staring at the field of view Receive the simulated light beam to be tested, and the field of view gaze is used for the ground detection optical terminal 7 to simulate the aiming, capturing and tracking process of the communication terminal; the ground detection optical terminal 7 generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second intersatellite light beam dynamic simulation module and multiple first intersatellite light beam dynamic simulation modules, and the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide direction to simulate the tracking condition of the networked optical terminal to be tested; the host computer 3 is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the precise tracking requirements, and obtain the corresponding time data; the host computer 3 is also used to perform a multi-beam scanning single-link link establishment test on the networked optical terminal to be tested through the adjusted intersatellite light beam dynamic simulation module, and generate a multi-beam collaborative scanning link establishment test result of the networked optical terminal to be tested according to the time data;

[0128] The host computer 3 is also used to switch the optical path to a different ground detection optical terminal 7 through the optical path switching module 2 according to the double-side switching instruction after the multi-beam collaborative scanning and link building test; the test system is also used to perform a simultaneous establishment of multiple links and stable tracking test on the current ground detection optical terminal 7 after the optical path switching module 2 switches the optical path to a different ground detection optical terminal 7, and obtain an updated test result of simultaneous establishment of multiple links and stable tracking of the networked optical terminal to be tested; the host computer 3 is also used to generate a comprehensive test result based on the calibration test result of the networked optical terminal to be tested, the multi-beam collaborative scanning and link building test result, and the updated test result of simultaneous establishment of multiple links and stable tracking of the networked optical terminal to be tested.

[0129] It should be noted that the comprehensive test results include link building time, tracking accuracy, etc. The transmission mode of the light beam in the inter-satellite light beam dynamic simulation module 1 in the comprehensive test scenario can refer to the transmission mode of the light beam in the inter-satellite light beam dynamic simulation module 1 in the third embodiment and the fifth embodiment. It can be understood that the light beam path changes with the change of the light path switching module, which will not be repeated here. Exemplary, combined with Figure 1, calibrate the optical axis of the four receiving and transmitting branches connected by the two aiming and tracking modules (M1, M2) of the networking optical terminal and the ground detection optical terminal (T1, T2), and operate the four intersatellite beam dynamic simulation modules (A1, A2, B1, B2) respectively: place a high-precision corner cube reflector at the front end of the collimator 101, connect the first coupling fiber 106 and the first transmitting fiber 1010 to the debugging laser light source respectively, adjust the second fast reflection mirror 1011 to make the two light spots in the image sensor overlap, and record the coordinates of the overlap point as the reference point of the receiving and transmitting optical axis of the branch. The first optical switch 201 and the second optical switch 201' of the optical path switching module are both turned to T1, and T1 simulates the calibration terminal. The power of the two receiving and transmitting paths connected to the two aiming and tracking modules M1 and M2 of the networked optical terminal and T1 is detected, and the corresponding adjustable optical attenuators (the first adjustable optical attenuator 107 of B1 and the second adjustable optical attenuators 109 of A1 and A2) are adjusted to simulate the far-field transmission attenuation of spatial light; the first fast mirror 102 of B1 is turned on to simulate the jitter of the calibration laser pointing angle caused by atmospheric deflection, and the image sensor 104 monitors the jitter of the calibration light pointing angle and presents the light spot trajectory on the host computer 3; the second fast mirrors 1011 of A1 and A2 are turned on to test the deviation of the receiving and transmitting pointing angle caused by the relaxation of the far-field transmission of the simulated light beam. Considering that the emission beam divergence angle of T1 is sufficient to cover the uncertainty range of the networked optical terminal to be tested, T1 emits a beam staring to provide calibration laser, which is transmitted through B1 and then divided into two paths through the optical path switching module to enter A1 and A2. The two aiming and tracking modules M1 and M2 of the networked optical terminal to be tested randomly deviate from the calibration optical axis of the test system according to the uncertainty range of the simulated calibration terminal (such as T1), and scan all ground inspection optical terminals respectively by field of view scanning; the two aiming and tracking modules M1 and M2 of the networked optical terminal to be tested successively capture the calibration laser in the field of view, perform rough tracking respectively, and then perform fine tracking. The two aiming and tracking modules M1 and M2 of the networked optical terminal to be tested receive the same beam of calibration laser, perform aiming and tracking module receiving optical axis calibration respectively, record the center coordinates of the receiving light spot as the reference point of the aiming and tracking module, and complete the calibration of multiple receiving optical axes under the same reference system. The first optical switch 201 and the second optical switch 201' of the optical path switching module are both turned to T2. The test system adjusts the link simulation parameters, performs power detection on the two transmit and receive light paths connected to the two aiming and tracking modules M1 and M2 of the networking optical terminal and T2, and adjusts the corresponding adjustable optical attenuators (the first adjustable optical attenuator 107 of B2 and the second adjustable optical attenuator 109 of A1 and A2) to simulate the far-field transmission attenuation of spatial light; turns on the first fast reflection mirror 102 of A1, A2, and B2 to simulate the jitter of the transmitting laser pointing angle caused by the vibration of the satellite platform, and the second fast reflection mirror 1011 to be tested simulates the deviation of the transmitting and receiving pointing angle caused by the relaxation of the far-field transmission of the light beam, and the image sensor 104 monitors the transmitting laser pointing and presents the light spot trajectory on the host computer 3.T2 field of view staring, that is, simulating the situation that the transmission beam divergence angle of the communication terminal to be established (such as the ground detection optical terminal 7 in the comprehensive test scenario) is insufficient, but the field of view angle is sufficient to cover the uncertainty range of the network optical terminal to be tested, randomly deviating from the calibration optical axis of the test system according to the uncertainty range of the simulated network optical terminal (such as the network optical terminal to be tested in the comprehensive test scenario), and using the field of view for staring. The two aiming and tracking modules M1 and M2 of the network optical terminal to be tested randomly deviate from the calibration optical axis of the test system according to the uncertainty range of the simulated communication terminal to be established (such as T2), that is, respectively transmit light beams to scan T2; the image sensors 104 of A1, A2, B1, and B2 monitor the direction of the transmitted laser and present the light spot trajectory on the host computer 3. T2 captures the beam of the network optical terminal, determines the direction of the beam of the network optical terminal, and reflects the beam. The fields of view of M1 and M2 successively capture the two lasers of the ground detection optical terminal and perform rough tracking respectively; the image sensors 104 of A1 and A2 monitor the direction of the transmitted laser, and the host computer 3 calculates and presents the tracking accuracy. M1 and M2 perform precise tracking respectively; the image sensors 104 of A1 and A2 monitor the direction of the emitted laser, and the host computer 3 calculates and presents the tracking accuracy. M1 and M2 complete the multi-beam collaborative scanning link establishment and stabilize the tracking link. The host computer 3 calculates the time from the start of the link establishment instruction to the tracking accuracy meeting the precise tracking requirements, and presents the tracking accuracy of A1 and A2. The optical switch (such as the second optical switch 201') of the optical path switching module corresponding to the newly-established link aiming and tracking module M1 is turned to T1, at which time T1 simulates the new communication terminal to be established. The test system adjusts the link simulation parameters, performs power detection on the two transmit and receive paths used by the networking optical terminal to connect the newly built M1 and T1, and adjusts the corresponding adjustable optical attenuators (the first adjustable optical attenuator 107 and the second adjustable optical attenuator 109 of B1) to simulate the far-field transmission attenuation of spatial light; turns on the first fast-reflection mirrors 102 of A1 and B1 to simulate the jitter of the transmitting laser pointing angle caused by the vibration of the satellite platform, and the second fast-reflection mirror 1011 to simulate the transmit and receive pointing angle deviation caused by the relaxation of the far-field transmission of the light beam to be tested. Considering that the transmitting beam divergence angle of the ground inspection optical terminal T1 to be established is insufficient, and the field of view angle is sufficient to cover the uncertainty range of the networking optical terminal, the calibration optical axis of the test system is randomly deviated according to the uncertainty range of the simulated networking optical terminal (such as the networking optical terminal to be tested in the comprehensive test scenario), and the field of view is used for staring. When the network optical terminal to be tested is used for the newly-built chain aiming and tracking module M1, the calibration optical axis of the test system is randomly deviated according to the uncertainty range of the new communication terminal to be simulated (such as the ground detection optical terminal T1), and the ground detection optical terminal T1 is scanned by the transmitted light beam; the image sensors 104 of A1 and B1 monitor the direction of the transmitted laser and present the light spot trajectory on the host computer 3. T1 captures the beam of the network optical terminal, determines the direction of the beam of the network optical terminal, and reflects the beam. The newly-built chain aiming and tracking module M1 of the network optical terminal to be tested captures the T1 laser for rough tracking; the image sensor 104 of A1 monitors the direction of the transmitted laser, and the host computer 3 calculates and presents the tracking accuracy.The new link aiming and tracking module M1 of the optical terminal to be tested performs precise tracking; the image sensor 104 of A1 monitors the direction of the transmitted laser, and the host computer 3 calculates and presents the tracking accuracy. The new link aiming and tracking module M1 of the optical terminal to be tested completes the simultaneous establishment of multiple links and stable tracking communication test. The host computer 3 calculates and presents the time from the start of the new link instruction to the tracking accuracy meeting the precise tracking requirements, and simultaneously presents the tracking accuracy of the two links.

[0130] In this implementation, the comprehensive test results reflect the performance of the tested network optical terminal in different working modes, covering optical axis calibration, single-link and multi-link link building efficiency, tracking accuracy, etc., providing comprehensive data support for the comprehensive performance optimization of the optical terminal. Through comprehensive testing, the system fully verifies the different working modes of the optical terminal under real simulation conditions, ensuring the stability and reliability of the optical terminal in actual applications.

[0131] Based on the above embodiments and implementation methods, the present application provides a performance testing method for an intersatellite networking optical terminal, and the test system is applied to the aiming, capturing and tracking test of the networked optical terminal to be tested, and the test system includes: a ground detection optical terminal, an intersatellite light beam dynamic simulation module, an optical path switching module and a host computer; the host computer responds to a test request, determines a current test scenario according to the test request, and generates an optical path switching instruction according to the current test scenario; the host computer responds to the optical path switching instruction, controls the optical path switching module according to the optical path switching instruction, and adjusts parameters of the intersatellite light beam dynamic simulation module according to the current test scenario; the optical path switching module switches the optical path according to the optical path switching instruction; the intersatellite light beam dynamic simulation module calibrates the optical axis of the test system through the switched optical path to obtain an optical axis calibration result; the ground detection optical terminal generates an auxiliary light beam to simulate a communication terminal or a calibration terminal, and sends the auxiliary light beam to the network to be tested through the intersatellite light beam dynamic simulation module. Optical terminal; the intersatellite beam dynamic simulation module receives the auxiliary beam through the switched optical path, and performs intersatellite beam transmission simulation on the auxiliary beam to obtain the auxiliary simulation, and projects the auxiliary simulation to the networked optical terminal to be tested; the intersatellite beam dynamic simulation module also receives the test beam emitted by the networked optical terminal to be tested through the switched optical path, and performs intersatellite beam transmission simulation on the test beam to obtain the simulated beam to be tested, and projects the simulated beam to be tested to the ground detection optical terminal; the intersatellite beam dynamic simulation module also monitors the optical path parameters during the emission of the test beam and the auxiliary beam, and sends the optical path parameters to the host computer, the optical path parameters including the optical path trajectory; the host computer also calculates the time from the start of the link establishment instruction to the tracking accuracy meeting the precise tracking requirements, and obtains the corresponding time data; the host computer also tests the networked optical terminal to be tested through the intersatellite beam dynamic simulation module, and generates the test results of the networked optical terminal to be tested based on the optical axis calibration results, the optical path trajectory, and the time data.

[0132] It should be noted that the performance test method of the intersatellite networking optical terminal proposed in this embodiment is applied to the performance test system of the intersatellite networking optical terminal proposed in the above embodiments and implementation methods, which can solve the technical problems of limited test functions and low test efficiency of the networking optical terminal in multiple application scenarios. Compared with the prior art, the beneficial effects of the performance test method of the intersatellite networking optical terminal provided by this application are the same as the beneficial effects of the performance test system of the intersatellite networking optical terminal provided by the above embodiments, and other technical features in the performance test method of the intersatellite networking optical terminal are the same as the features disclosed in the above embodiments, which will not be repeated here.

[0133] In order to make the performance test method of the above-mentioned intersatellite networking optical terminal clearer, based on the sixth embodiment of the present application and its implementation method, a test method flow chart of three tests including a multi-beam calibration test, a multi-beam scanning single link link establishment test, and a multi-beam multi-link link establishment tracking test is provided ( Figure 7 ), and comprehensive tests ( Figure 8 ) test method flow chart.

[0134] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0135] The flow chart and block diagram in the accompanying drawings illustrate the system, method and possible architecture, function and operation of various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0136] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0137] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A performance test system for an intersatellite network optical terminal, characterized in that: The test system is applied to the aiming, capturing and tracking test of the network optical terminal to be tested, and the test system comprises: a ground detection optical terminal, an inter-satellite beam dynamic simulation module, an optical path switching module and a host computer; The host computer is used to respond to the test request, determine the current test scene according to the test request, and generate an optical path switching instruction according to the current test scene; The host computer is used to respond to the optical path switching instruction, control the optical path switching module according to the optical path switching instruction, and adjust the parameters of the inter-satellite beam dynamic simulation module according to the current test scenario; The optical path switching module is used to switch the optical path according to the optical path switching instruction; The inter-satellite beam dynamic simulation module is used to calibrate the optical axis of the test system through the switched optical path to obtain an optical axis calibration result; The ground detection optical terminal is used to simulate a communication terminal or a calibration terminal by generating an auxiliary light beam, and send the auxiliary light beam to the network optical terminal to be tested through the inter-satellite light beam dynamic simulation module; The inter-satellite beam dynamic simulation module is used to receive the auxiliary beam through the switched optical path, perform inter-satellite beam transmission simulation on the auxiliary beam, obtain an auxiliary simulated beam, and project the auxiliary simulated beam to the networking optical terminal to be tested; The inter-satellite beam dynamic simulation module is also used to receive the beam to be tested emitted by the network optical terminal to be tested through the switched optical path, and perform inter-satellite beam transmission simulation on the beam to be tested to obtain the simulated beam to be tested, and project the simulated beam to be tested to the ground detection optical terminal; The inter-satellite beam dynamic simulation module is also used to monitor the optical path parameters of the beam to be measured and the auxiliary beam during the emission process, and send the optical path parameters to the host computer, wherein the optical path parameters include the optical path trajectory; The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data; The host computer is also used to test the networked optical terminal to be tested through the inter-satellite light beam dynamic simulation module, and generate a test result of the networked optical terminal to be tested based on the optical axis calibration result, the light path trajectory, and the time data.

2. The test system according to claim 1, characterized in that: The inter-satellite beam dynamic simulation module comprises: at least one first inter-satellite beam dynamic simulation module and at least one second inter-satellite beam dynamic simulation module; The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested; The optical path switching module is used to switch the optical path according to the optical path switching instruction; The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal; The second inter-satellite beam dynamic simulation module is further used to receive the auxiliary beam emitted by the ground detection optical terminal, and send the auxiliary beam to the first inter-satellite beam dynamic simulation module through the optical path switching module to obtain the auxiliary simulation beam; The first inter-satellite beam dynamic simulation module is further used to receive the auxiliary simulation beam emitted by the second inter-satellite beam dynamic simulation module according to the switched optical path, and send the auxiliary simulation beam to the networking optical terminal to be tested.

3. The test system according to claim 2, characterized in that: The intersatellite beam dynamic simulation module comprises: a collimator, a first fast-reflecting mirror, a first beam splitter, a second beam splitter, a first coupling optical fiber, a first adjustable optical attenuator, an optical fiber circulator, a power test module, an image sensor, a second adjustable optical attenuator, a first transmitting optical fiber, and a second fast-reflecting mirror; The collimator is used to receive the light beam to be measured or the auxiliary light beam emitted by the network optical terminal to be measured or the ground detection optical terminal through the switched optical path, and focus and shrink the light beam to be measured or the auxiliary light beam to simulate the spatial light beam transmission of the far-field wavefront, obtain a forward first simulated light beam, and project the forward first simulated light beam to the first fast reflection mirror; The first fast reflection mirror is used to adjust the direction of the first forward simulated light beam to obtain a second forward simulated light beam, and transmit the second forward simulated light beam to the first beam splitter, wherein the direction adjustment is used to simulate the light beam jitter caused by the vibration of the satellite platform; The first beam splitter is used to perform wavelength splitting on the second forward simulated light beam to obtain a third forward simulated light beam, and transmit the third forward simulated light beam to the second beam splitter, wherein the wavelength splitting is used to control the propagation direction of the transmitting and receiving light beams; The second beam splitter is used to perform power splitting on the third forward simulated light beam to obtain a fourth forward simulated light beam and a fifth forward simulated light beam, transmit the fourth forward simulated light beam to the image sensor, and transmit the fifth forward simulated light beam to the first coupling optical fiber, and the power splitting is used to split the third forward simulated light beam into the fourth forward simulated light beam and the fifth forward simulated light beam; The image sensor is used to obtain the simulated light path trajectory in real time and transmit it to the host computer; The first coupling optical fiber is used to receive the fifth forward simulated light beam and transmit the fifth forward simulated light beam to a first adjustable optical attenuator; The first adjustable optical attenuator is used to adjust the power of the fifth forward simulated light beam through the power test module to obtain a sixth forward simulated light beam, wherein the power adjustment is used to simulate the attenuation of the intersatellite transmission link, and the sixth forward simulated light beam passes through the optical fiber circulator to perform unidirectional transmission of the optical path; The optical fiber circulator is also used to receive the simulated light beam incident from other inter-satellite light beam dynamic simulation modules, obtain the reverse first simulated light beam, and transmit it to the second adjustable optical attenuator; The second adjustable optical attenuator is used to adjust the power of the reverse first simulated light beam through the power test module to obtain a reverse second simulated light beam; The first transmitting optical fiber is used to receive the reverse second simulated light beam and transmit the reverse second simulated light beam to the second fast reflection mirror; The second fast-reflecting mirror is used to adjust the direction of the reverse second simulated light beam to obtain a reverse third simulated light beam, and transmit it to the first beam splitter, wherein the direction adjustment is used to simulate the deviation of the transmitting and receiving pointing angle caused by the relaxation of the light beam in the far-field transmission; The first beam splitter is further used to perform wavelength splitting on the reverse third simulated light beam to obtain a reverse fourth simulated light beam, and transmit the reverse fourth simulated light beam to the second beam splitter; The first fast-reflecting mirror is further used to adjust the direction of the reverse fourth simulated light beam to obtain a reverse fifth simulated light beam, and transmit it to the network optical terminal to be tested through the parallel light pipe; The power testing module is used to monitor the power parameters of the forward fifth simulated light beam and transmit the obtained power parameters to the host computer; The host computer is also used to test the networking optical terminal to be tested through the at least one first inter-satellite light beam dynamic simulation module, and generate a test result of the networking optical terminal to be tested based on the optical axis calibration result and the simulated light path trajectory.

4. The test system according to claim 3, characterized in that: The current test scene is a multi-beam calibration test scene, the auxiliary beam is a wide beacon beam, and the optical path switching instruction includes a first unilateral switching instruction; The host computer is used to switch the optical path switching module to the same ground detection optical terminal according to the first unilateral switching instruction; The ground inspection optical terminal is used to simulate the calibration terminal to generate a wide beacon beam, and send the wide beacon beam to the network optical terminal to be tested through the second inter-satellite beam dynamic simulation module and a plurality of the first inter-satellite beam dynamic simulation modules; The second inter-satellite beam dynamic simulation module is used to receive the wide beacon beam emitted by the ground detection optical terminal, and send the wide beacon beam to the first inter-satellite beam dynamic simulation module through the optical path switching module to obtain a calibration simulation beam; The first inter-satellite beam dynamic simulation module is used to receive the calibration simulation beam emitted by the second inter-satellite beam dynamic simulation module according to the switched optical path, and send the calibration simulation beam to the network optical terminal to be tested; The host computer is also used to perform a multi-beam calibration test on the networked optical terminal to be tested through at least two first inter-satellite beam dynamic simulation modules and at least one second inter-satellite beam dynamic simulation module, and generate a calibration test result of the networked optical terminal to be tested based on the optical axis calibration result and the simulated optical path trajectory.

5. The test system according to claim 3, characterized in that: The current test scenario is a multi-beam scanning link building test scenario, the auxiliary beam is a narrow beacon beam, and the optical path switching instruction includes a second unilateral switching instruction; The host computer is used to switch the optical path switching module to the same ground detection optical terminal according to the second unilateral switching instruction; The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested; The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal; The ground detection optical terminal is used to wait and receive the simulated light beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal to simulate the aiming, capturing and tracking process of the communication terminal; The ground detection optical terminal generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second inter-satellite light beam dynamic simulation module and a plurality of the first inter-satellite light beam dynamic simulation modules, wherein the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide a direction, so as to simulate the tracking condition of the networked optical terminal to be tested; The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data; The host computer is also used to perform a multi-beam scanning link establishment test on the networked optical terminal to be tested through at least two first inter-satellite beam dynamic simulation modules and at least one second inter-satellite beam dynamic simulation module, and generate a multi-beam scanning single-link link establishment test result of the networked optical terminal to be tested based on the optical axis calibration result, the simulated optical path trajectory, and the time data.

6. The test system according to claim 3, characterized in that: The current test scenario is a test scenario of establishing multiple links simultaneously and tracking stably, the auxiliary light beam is a narrow beacon light beam, and the optical path switching instruction includes a bilateral switching instruction; The host computer is used to switch the optical path switching module to different ground detection optical terminals according to the double-side switching instruction; The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested; The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal; The ground detection optical terminal is used to wait and receive the simulated light beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal to simulate the aiming, capturing and tracking process of the communication terminal; The ground detection optical terminal generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second inter-satellite light beam dynamic simulation module and a plurality of the first inter-satellite light beam dynamic simulation modules, wherein the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide a direction, so as to simulate the tracking condition of the networked optical terminal to be tested; The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data; The host computer is also used to perform simultaneous establishment of multiple links and stable tracking tests on the networked optical terminal to be tested through at least two first inter-satellite light beam dynamic simulation modules and at least two second inter-satellite light beam dynamic simulation modules, and generate simultaneous establishment of multiple links and stable tracking test results for the networked optical terminal to be tested based on the optical axis calibration result, the simulated light path trajectory and the time data.

7. The test system according to claim 3, characterized in that: The current test scenario is a comprehensive test scenario, the auxiliary light beam includes a wide beacon light beam and a narrow beacon light beam, and the light path switching instruction includes a second single-side switching instruction and a double-side switching instruction; The host computer is used to switch the optical path to the same ground detection optical terminal through the optical path switching module according to the second unilateral switching instruction after the multi-beam calibration test; The first inter-satellite beam dynamic simulation module is used to receive the beam to be tested emitted by the network optical terminal to be tested, and send the beam to be tested to the second inter-satellite beam dynamic simulation module through the optical path switching module to obtain the simulated beam to be tested; The second inter-satellite beam dynamic simulation module is used to receive the simulated beam to be tested emitted by the first inter-satellite beam dynamic simulation module according to the switched optical path, and send the simulated beam to be tested to the ground detection optical terminal; The ground detection optical terminal is used to wait for receiving the simulated light beam to be tested by staring at the field of view, and the field of view staring is used for the ground detection optical terminal to simulate the aiming, capturing and tracking process of the communication terminal; The ground detection optical terminal generates a narrow beacon beam according to the simulated light beam to be tested, and sends the narrow beacon beam to the networked optical terminal to be tested through the second inter-satellite light beam dynamic simulation module and a plurality of the first inter-satellite light beam dynamic simulation modules, wherein the narrow beacon beam is used to guide the light beam to be tested emitted by the networked optical terminal to provide a direction, so as to simulate the tracking condition of the networked optical terminal to be tested; The host computer is also used to calculate the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtain the corresponding time data; The host computer is further used to perform a multi-beam scanning single-link link building test on the network optical terminal to be tested through the adjusted inter-satellite beam dynamic simulation module, and generate a multi-beam collaborative scanning link building test result of the network optical terminal to be tested according to the time data; The host computer is further used to switch the optical path to different ground detection optical terminals through the optical path switching module according to the double-side switching instruction after the multi-beam collaborative scanning and link building test; The test system is also used to perform a simultaneous multi-link establishment and stable tracking test on the current ground detection optical terminal after the optical path switching module switches the optical path to a different ground detection optical terminal, and obtain an updated test result of simultaneous multi-link establishment and stable tracking of the network optical terminal to be tested; The host computer is also used to generate a comprehensive test result based on the calibration test results of the networked optical terminal to be tested, the multi-beam collaborative scanning and link building test results, and the updated networked optical terminal to be tested simultaneously establishing multiple links and stably tracking test results.

8. A performance test method for an intersatellite network optical terminal, characterized in that: The test system is applied to the aiming, capturing and tracking test of the network optical terminal to be tested, and the test system comprises: a ground detection optical terminal, an inter-satellite beam dynamic simulation module, an optical path switching module and a host computer; The host computer responds to the test request, determines the current test scenario according to the test request, and generates an optical path switching instruction according to the current test scenario; The host computer responds to the optical path switching instruction, controls the optical path switching module according to the optical path switching instruction, and adjusts the parameters of the inter-satellite beam dynamic simulation module according to the current test scenario; The optical path switching module switches the optical path according to the optical path switching instruction; The inter-satellite beam dynamic simulation module performs optical axis calibration on the test system through the switched optical path to obtain an optical axis calibration result; The ground inspection optical terminal generates an auxiliary light beam to simulate a communication terminal or a calibration terminal, and sends the auxiliary light beam to the network optical terminal to be tested through the inter-satellite light beam dynamic simulation module; The inter-satellite beam dynamic simulation module receives the auxiliary beam through the switched optical path, performs inter-satellite beam transmission simulation on the auxiliary beam, obtains an auxiliary simulation, and projects the auxiliary simulation to the networking optical terminal to be tested; The inter-satellite beam dynamic simulation module also receives the beam to be tested emitted by the network optical terminal to be tested through the switched optical path, performs inter-satellite beam transmission simulation on the beam to be tested, obtains the simulated beam to be tested, and projects the simulated beam to be tested to the ground detection optical terminal; The inter-satellite beam dynamic simulation module also monitors the optical path parameters of the measured beam and the auxiliary beam during the emission process, and sends the optical path parameters to the host computer, wherein the optical path parameters include the optical path trajectory; The host computer also calculates the time from the start of the link establishment instruction to the tracking accuracy meeting the fine tracking requirement, and obtains the corresponding time data; The host computer also tests the networked optical terminal to be tested through the inter-satellite light beam dynamic simulation module, and generates a test result of the networked optical terminal to be tested based on the optical axis calibration result, the light path trajectory, and the time data.

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