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A semi-physical testing system and method based on a high-orbit navigation compatible machine

A test system and compatible machine technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve the problems of distortion, error, inability to realize orbit measurement and control, etc. of test results, and achieve the verification of orbit control. The effect of precision

Active Publication Date: 2022-05-24
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

[0003] The GNSS simulator can simulate the radio frequency signal of the navigation constellation. The conventional low-orbit satellite platform adopts the offline trajectory driving method of the GNSS simulator for semi-physical testing of the system. The GNSS antenna is regarded as an omnidirectional antenna, that is, all the navigation star signals generated by the simulator are Introducing a navigation compatible computer for calculation, the GNSS antenna cut-off angle for high-orbit satellites is very small, and the navigation star signals generated by most simulators are rejected at the high-orbit GNSS antenna, so if it is regarded as an omnidirectional antenna, the test results will be negative Severe distortion; in addition, the offline drive will cause a navigation error of several kilometers per second due to time asynchrony, and it is impossible to achieve accurate orbit measurement and control

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  • A semi-physical testing system and method based on a high-orbit navigation compatible machine
  • A semi-physical testing system and method based on a high-orbit navigation compatible machine

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Embodiment Construction

[0032] like figure 1 , a semi-physical test system based on a high-orbit navigation compatible machine, including a GNSS simulator, an adjustable attenuator, a ground transmitting antenna, a dynamic host computer, a remote control computer, a high-orbit navigation compatible machine, an on-board control computer and a database;

[0033] The GNSS simulator receives the initialization data sent by the dynamics host computer, starts after initializing configuration and sensitivity calibration, and sends the initialization completion status to the remote control computer after the initialization is completed; receives the data sent by the dynamics host computer, and sends the data After being converted into RF signal, it is output to the GNSS antenna of the high-orbit navigation compatible machine through the adjustable attenuator and ground transmitting antenna. The high-orbit navigation compatible machine filters, converts and solves the received RF signal to obtain measurement d...

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Abstract

A semi-physical testing system and method based on a high-orbit navigation compatible machine, belonging to the field of space technology. The invention proposes a semi-physical test method combining real GNSS antenna + GNSS simulator to solve the problem that high-orbit weak signals cannot be realistically simulated in the semi-physical test of high-orbit navigation compatible machines; at the same time, dynamics are realized by means of reflection memory network handshake The synchronous triggering of the upper computer and the GNSS simulator solves the problem that the measurement data of the high-orbit navigation compatible machine cannot be connected to the control closed loop in real time during the system-level semi-physical test.

Description

technical field [0001] The invention relates to a semi-physical testing system and method based on a high-orbit navigation compatible machine, in particular a system-level test method of a high-orbit navigation compatible machine under the semi-physical simulation condition of a satellite platform. Background technique [0002] On the conventional satellite platform, the navigation compatible machine mainly provides the time correction function and the auxiliary ground orbit determination function, and only needs to output the accurate time information and the original measurement data of the navigation satellite. The test method usually uses an outdoor received antenna to introduce GPS, GLONASS and BD signals into the navigation compatible machine through a frequency transponder, and uses the time calibration function of the navigation compatible machine and the satellite-to-ground data transmission link to download the time information and original measurement data to the g...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/20G01S19/25
CPCG01S19/20G01S19/256
Inventor 艾奇武静方圆陈浩王向詹鹏宇
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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