Semi-physical simulation test device and method for connecting a real radio frequency jammer to a darkroom

Abstract

The present invention relates to a semi-physical simulation test device and method for connecting a real-installed radio frequency jammer to a darkroom, and belongs to the field of semi-physical simulation tests. Through the special design of a radio frequency interference simulator and an array feeding system, a semi-physical simulation test for verifying the anti-interference performance of radar-guided weapons based on a real-installed radio frequency jammer is realized, which solves the problem that the traditional simulation method based on a radio frequency interference simulator cannot realistically simulate the actual interference signal in the external field and cannot truly reproduce the simulation of the confrontation process between the guided weapon and the real-installed radio frequency jammer in the actual external field. The semi-physical simulation test carried out by the present invention is closer to the actual working process of the radar-guided weapon and has a higher simulation confidence. The method is simple in design, effective, and practical, and has a good space for promotion and application.

Description

Technical Field

[0001] The invention belongs to the field of semi-physical simulation test, and in particular relates to a semi-physical simulation test device and method for connecting a real-installed radio frequency jammer to a darkroom. Background Art

[0002] The semi-physical test for anti-interference performance verification of radar-guided weapons in the indoor field needs to be carried out in a microwave darkroom with the help of simulation equipment such as a radio frequency interference simulator. The simulation system is generally composed of a microwave darkroom, an array feeding system, a radio frequency echo simulator, a radio frequency interference simulator, a three-axis turntable, a simulation computer, a test control system and other equipment. Its working principle is:

[0003] Before the test begins, the test control system sets the battlefield and initial simulation conditions, target, background environment and interference signal characteristic parameters, guided weapon aerodynamic characteristics, engine thrust characteristics and other parameters, and sets test control parameters such as simulation cycle and simulation time. After the firing command is issued, the test control system sets the launch parameters and initial navigation parameters according to the guided weapon working sequence, and each test component starts working according to the guided weapon sequence. At the same time, the test control system sends a zero-second synchronization signal to start all simulation equipment.

[0004] After the test begins, the simulation computer solves the dynamic and kinematic models in real time, generates the guided weapon's attitude, position, velocity, acceleration and target motion signals, and outputs them to the real-time network. The three-axis turntable loads the seeker and inertial navigation, receives the control instructions given by the simulation computer from the real-time network to control the three-axis turntable to move, and simulates the attitude changes of the guided weapon during flight (angular motion of three degrees of freedom: roll, pitch and yaw); the inertial navigation is sensitive to the movement of the three-axis turntable, solves the current attitude information of the guided weapon and transmits it to the missile-borne computer. The missile-borne computer integrates the measurement information of the inertial navigation and other sensors, and forms control instructions to stimulate the steering gear to deflect according to the guidance control model, and controls the guided weapon to fly according to the planned trajectory. Under the control of the test master control system and the simulation computer, the RF echo simulator generates the target's radar echo signal, and the RF interference simulator generates various types of interference signals; the array feed system receives the target signal and interference signal sent by the RF echo simulator and the RF interference simulator, and then processes them by frequency conversion, and then the antenna array of the array feed system is fed out to radiate to the test seeker. When the guided weapon reaches the target capture area, the onboard computer generates a seeker start signal to put the seeker into operation; the seeker sensitive target echo signal and interference signal are resolved to calculate the line of sight angular rate signal and transmit it to the onboard computer; the onboard computer integrates the measurement information of inertial navigation, seeker and other sensors, forms control instructions according to the guidance control model, and sends them to the servo to form the rudder deflection angle; the simulation computer calculates the control force and torque according to the rudder deflection angle to control the flight of the guided weapon until it hits the target. During the entire test process, the various components of the simulation system exchange information through the real-time network, and the entire test process is controlled by the test master control system.

[0005] The traditional simulation method based on RF interference simulator has some drawbacks: first, the interference model used by the RF interference simulator is a statistical model based on the principle mechanism, which cannot realistically simulate the actual interference signal in the field; second, it cannot truly reproduce the confrontation process between field guided weapons and actual RF jammers. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The technical problem to be solved by the present invention is to provide a semi-physical simulation test device and method for connecting a real-installed radio frequency jammer to a darkroom, which solves the problem that the traditional simulation method based on a radio frequency interference simulator cannot realistically simulate the actual interference signal in the external field and cannot truly reproduce the simulation of the confrontation process between the guided weapon and the real-installed radio frequency jammer in the actual external field.

[0008] (II) Technical solution

[0009] In order to solve the above technical problems, the present invention provides a semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom, comprising: an array feeding system, a radio frequency interference simulator, a real-installed radio frequency jammer and a high-power attenuator;

[0010] The array feeding system is equipped with a signal receiving unit and an antenna array, wherein the signal receiving unit is used to receive a signal from the seeker under test and output the signal to a radio frequency interference simulator;

[0011] The radio frequency interference simulator is connected to the installed radio frequency jammer and is used to modulate the delay, Doppler and power of the input signal and then output it to the installed radio frequency jammer;

[0012] The installed radio frequency jammer detects and sorts the received signal, generates and outputs an interference signal according to the interference strategy, and the interference signal output by the installed radio frequency jammer is adjusted to a suitable power by a high-power attenuator and then output to the array feeding system;

[0013] The array feeding system radiates the interference signal to the darkroom space through the antenna array, and the test seeker is sensitive to the interference signal, completing the simulation of the real confrontation process between the guided weapon and the actual installed radio frequency jammer.

[0014] The signal receiving unit receives the signal transmitted by the test seeker through the receiving antenna on the antenna array, and the signal receiving unit processes the received signal and outputs it to the radio frequency interference simulator as its excitation signal.

[0015] The radio frequency interference simulator receives an excitation signal from a signal detection unit, and performs delay modulation, Doppler modulation and power modulation on the received excitation signal;

[0016] The delay modulation is used to realize the delay caused by the radial distance between the simulated installed radio frequency jammer and the tested seeker;

[0017] The Doppler modulation is used to realize the Doppler frequency deviation caused by the radial velocity of the simulated installed radio frequency jammer and the tested seeker;

[0018] The power modulation is used to simulate the power of the signal transmitted by the test seeker received by the jammer in an actual field environment.

[0019] Among them, the power value of the input signal of the array feeding system is much smaller than the power value of the output signal of the installed RF jammer. The high-power signal output by the installed RF jammer is attenuated to a suitable power through a high-power attenuator and then output to the array feeding system.

[0020] The array feeding system simulates the power of the signal transmitted by the installed RF jammer received by the test seeker by controlling the output power of the installed RF jammer, and simulates the spatial angle between the installed RF jammer and the test seeker by angle control.

[0021] Wherein, when the RF interference simulator is externally connected to the actual RF jammer, it is necessary to simulate the radial distance and radial speed between the actual RF jammer and the test seeker, as well as the power of the signal transmitted by the test seeker received by the actual RF jammer;

[0022] The simulation of the radial distance between the simulated jammer and the test seeker is achieved by delaying the input signal:

[0023]

[0024] Where τ is the distance delay, R is the radial distance between the installed RF jammer and the seeker under test, and C is the speed of light;

[0025] The Doppler frequency deviation of the simulated jammer and the test seeker is simulated by Doppler modulation of the input signal:

[0026]

[0027] In the formula, f d is the Doppler frequency, v is the radial velocity between the jammer and the seeker under test, and λ is the wavelength of the signal transmitted by the seeker under test;

[0028] By controlling the power of the output signal of the RF interference simulator, the power of the signal transmitted by the test seeker received by the jammer in the actual field environment can be simulated:

[0029]

[0030] Where P rj is the transmit power of the test seeker received by the jammer, P t is the transmitting power of the test seeker, G t is the antenna gain of the test seeker, G r is the jammer receiving antenna gain, λ is the wavelength of the signal transmitted by the test seeker, and R is the radial distance between the jammer and the test seeker.

[0031] The array feeding system is used to simulate the transmission power of the signal transmitted by the installed RF jammer to the antenna aperture of the test seeker, and modulate the power of the input signal:

[0032]

[0033] Where P r is the received signal power of the antenna aperture of the tested seeker, P tjis the jammer transmission power, G r is the jammer receiving antenna gain, λ is the wavelength of the signal transmitted by the test seeker, and R is the radial distance between the jammer and the test seeker.

[0034] A semi-physical simulation test method for connecting a real-installed radio frequency jammer to a darkroom, the test method is implemented based on a semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom, and comprises the following steps:

[0035] Step 1: Connect the simulation device and the test product;

[0036] Step 2: The test master control system binds the conventional test parameters and the working parameters required by the external installed RF jammer;

[0037] Step 3: After the test begins, the RF interference simulator calculates and controls the signal based on the radial distance, radial velocity and spatial angle relationship between the jammer and the test seeker given by the test master control system, and realizes the simulation of the relative time delay between the jammer output signal and the test seeker transmission signal, the Doppler frequency deviation of the jammer output signal relative to the test seeker transmission, and the power of the test seeker transmission signal received by the jammer through calculation and signal control;

[0038] Step 4: The array feed system channel connected to the installed RF jammer calculates and modulates the power of the input signal to simulate the signal power output from the jammer to the antenna aperture of the test seeker according to the radial distance and spatial angle relationship between the jammer and the test seeker given by the test master control system;

[0039] Step 5: The installed RF jammer detects and sorts the received signals, selects the corresponding jamming strategy and outputs the jamming signal to complete the assessment and verification of the anti-jamming performance of the radar-guided weapon.

[0040] Among them, the conventional test parameters bound by the test master control system in step 2 include: working parameters of the test seeker, simulated target parameters, clutter parameters, and interference parameters.

[0041] Relatives, the working parameters required for the externally installed RF jammer in step 2 include: antenna pattern parameters and transmission power.

[0042] (III) Beneficial effects

[0043] Compared with the prior art, the present invention has the following beneficial effects: through the special design of the radio frequency interference simulator and the array feeding system, a semi-physical simulation test for verifying the anti-interference performance of radar-guided weapons based on a real-installed radio frequency jammer is realized. The semi-physical simulation test carried out using this method is closer to the actual working process of radar-guided weapons and has a higher simulation confidence. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is the working principle diagram of the present invention;

[0045] Figure 2 It is the work flow chart of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0047] In this embodiment, connecting the actual RF jammer to the darkroom to carry out semi-physical simulation test for verifying the anti-interference performance of radar-guided weapons can more realistically reproduce the confrontation process between the guided weapon and the actual RF jammer, simulate various real interference effects, and thus more effectively verify and evaluate the anti-interference performance of the test seeker.

[0048] (1) Analysis of the differences in the use of installed RF jammers in darkroom and field environments

[0049] Since the signal of the test seeker received by the installed RF jammer is different from the signal of the test seeker received in the actual field environment, the installed RF jammer cannot be used directly in the microwave darkroom as an independent system, which is mainly reflected in the following aspects:

[0050] 1) The signal power received by the installed RF jammer is different

[0051] In the actual field environment, the signal power received by the installed RF jammer will be affected by factors such as the radial distance between the jammer and the test seeker, the spatial angle relationship, and the seeker antenna. In the microwave darkroom, the positions of the installed RF jammer and the test seeker are fixed, resulting in a fixed signal power received by the installed RF jammer, which cannot reflect the changes in the received signal power of the installed RF jammer.

[0052] 2) The Doppler frequency deviation of the signal received by the installed RF jammer is different

[0053] In the actual field environment, the Doppler frequency deviation of the signal received by the installed RF jammer is related to the radial velocity of the jammer and the seeker under test. In the microwave darkroom, the positions of the installed RF jammer and the seeker under test are fixed without radial movement. The installed RF jammer cannot generate Doppler frequency deviation when receiving the signal from the seeker under test.

[0054] 3) The power of the signal transmitted by the installed RF jammer reaching the test seeker is different

[0055] In the actual field environment, the power of the signal transmitted by the installed RF jammer to the test seeker is related to the radial distance and spatial angle relationship between the jammer and the test seeker. In the microwave darkroom, the position and spatial angle of the installed RF jammer and the test seeker are fixed, and it is impossible to truly replicate the signal power of the signal transmitted by the installed RF jammer to the test seeker.

[0056] 4) The signal delay between the installed RF jammer and the tested seeker is different

[0057] In the actual field environment, the signal delay between the installed RF jammer and the test seeker is related to the radial distance between the jammer and the test seeker. In the microwave darkroom, the position of the installed RF jammer and the test seeker is fixed, the radial distance is fixed, and the signal delay between the installed RF jammer and the test seeker remains unchanged.

[0058] A semi-physical simulation test device for connecting a real-installed RF jammer to a darkroom, including: an array feeding system, a RF jammer simulator, a real-installed RF jammer, and a high-power attenuator;

[0059] The array feeding system is equipped with a signal receiving unit and an antenna array, wherein the signal receiving unit is used to receive a signal from the seeker under test and output the signal to a radio frequency interference simulator;

[0060] The radio frequency interference simulator is connected to the installed radio frequency jammer and is used to modulate the delay, Doppler and power of the input signal and then output it to the installed radio frequency jammer;

[0061] The installed radio frequency jammer detects and sorts the received signal, generates and outputs an interference signal according to the interference strategy, and the interference signal output by the installed radio frequency jammer is adjusted to a suitable power by a high-power attenuator and then output to the array feeding system;

[0062] The array feeding system radiates the interference signal to the darkroom space through the antenna array, and the test seeker is sensitive to the interference signal, completing the simulation of the real confrontation process between the guided weapon and the actual installed radio frequency jammer.

[0063] The signal receiving unit receives the signal transmitted by the test seeker through the receiving antenna on the antenna array, and the signal receiving unit processes the received signal and outputs it to the radio frequency interference simulator as its excitation signal.

[0064] The radio frequency interference simulator receives an excitation signal from a signal detection unit, and performs delay modulation, Doppler modulation and power modulation on the received excitation signal;

[0065] The delay modulation is used to realize the delay caused by the radial distance between the simulated installed radio frequency jammer and the tested seeker;

[0066] The Doppler modulation is used to realize the Doppler frequency deviation caused by the radial velocity of the simulated installed radio frequency jammer and the tested seeker;

[0067] The power modulation is used to simulate the power of the signal transmitted by the test seeker received by the jammer in an actual field environment.

[0068] Among them, the power value of the input signal of the array feeding system is much smaller than the power value of the output signal of the installed RF jammer. The high-power signal output by the installed RF jammer is attenuated to a suitable power through a high-power attenuator and then output to the array feeding system.

[0069] The array feeding system simulates the power of the signal transmitted by the installed RF jammer received by the test seeker by controlling the output power of the installed RF jammer, and simulates the spatial angle between the installed RF jammer and the test seeker by angle control.

[0070] Wherein, when the RF interference simulator is externally connected to the actual RF jammer, it is necessary to simulate the radial distance and radial speed between the actual RF jammer and the test seeker, as well as the power of the signal transmitted by the test seeker received by the actual RF jammer;

[0071] The simulation of the radial distance between the simulated jammer and the test seeker is achieved by delaying the input signal:

[0072]

[0073] Where τ is the distance delay, R is the radial distance between the installed RF jammer and the seeker under test, and C is the speed of light;

[0074] The Doppler frequency deviation of the simulated jammer and the test seeker is simulated by Doppler modulation of the input signal:

[0075]

[0076] In the formula, f d is the Doppler frequency, v is the radial velocity between the jammer and the seeker under test, and λ is the wavelength of the signal transmitted by the seeker under test;

[0077] By controlling the power of the output signal of the RF interference simulator, the power of the signal transmitted by the test seeker received by the jammer in the actual field environment can be simulated:

[0078]

[0079] Where P rj is the transmit power of the test seeker received by the jammer, P t is the transmitting power of the test seeker, G tis the antenna gain of the test seeker, G r is the jammer receiving antenna gain, λ is the wavelength of the signal transmitted by the test seeker, and R is the radial distance between the jammer and the test seeker.

[0080] The array feeding system is used to simulate the transmission power of the signal transmitted by the installed RF jammer to the antenna aperture of the test seeker, and modulate the power of the input signal:

[0081]

[0082] Where P r is the received signal power of the antenna aperture of the tested seeker, P tj is the jammer transmission power, G r is the jammer receiving antenna gain, λ is the wavelength of the signal transmitted by the test seeker, and R is the radial distance between the jammer and the test seeker.

[0083] A semi-physical simulation test method for connecting a real-installed radio frequency jammer to a darkroom, the test method is implemented based on a semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom, and comprises the following steps:

[0084] Step 1: Connect the simulation device and the test product;

[0085] Step 2: The test master control system binds the conventional test parameters and the working parameters required by the external installed RF jammer;

[0086] Step 3: After the test begins, the RF interference simulator calculates and controls the signal based on the radial distance, radial velocity and spatial angle relationship between the jammer and the test seeker given by the test master control system, and realizes the simulation of the relative time delay between the jammer output signal and the test seeker transmission signal, the Doppler frequency deviation of the jammer output signal relative to the test seeker transmission, and the power of the test seeker transmission signal received by the jammer through calculation and signal control;

[0087] Step 4: The array feed system channel connected to the installed RF jammer calculates and modulates the power of the input signal to simulate the signal power output from the jammer to the antenna aperture of the test seeker according to the radial distance and spatial angle relationship between the jammer and the test seeker given by the test master control system;

[0088] Step 5: The installed RF jammer detects and sorts the received signals, selects the corresponding jamming strategy and outputs the jamming signal to complete the assessment and verification of the anti-jamming performance of the radar-guided weapon.

[0089] Among them, the conventional test parameters bound by the test master control system in step 2 include: working parameters of the test seeker, simulated target parameters, clutter parameters, and interference parameters.

[0090] Relatives, the working parameters required for the externally installed RF jammer in step 2 include: antenna pattern parameters and transmission power.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A semi-physical simulation test device for connecting a radio frequency jammer to a darkroom, characterized in that: include: Array feed systems, RF jammers, field-mounted RF jammers, and high-power attenuators; The array feeding system is equipped with a signal receiving unit and an antenna array, wherein the signal receiving unit is used to receive a signal from the seeker under test and output the signal to a radio frequency interference simulator; The radio frequency interference simulator is connected to the installed radio frequency jammer and is used to modulate the delay, Doppler and power of the input signal and then output it to the installed radio frequency jammer; The installed radio frequency jammer detects and sorts the received signal, generates and outputs an interference signal according to the interference strategy, and the interference signal output by the installed radio frequency jammer is adjusted to a suitable power by a high-power attenuator and then output to the array feeding system; The array feeding system radiates the interference signal to the darkroom space through the antenna array, and the test seeker is sensitive to the interference signal, completing the simulation of the real confrontation process between the guided weapon and the actual installed radio frequency jammer.

2. The semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 1, characterized in that: The signal detection unit receives the signal transmitted by the test seeker through the receiving antenna on the antenna array, and the signal detection unit processes the received signal and outputs it to the radio frequency interference simulator as its excitation signal.

3. The semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 2, characterized in that: The radio frequency interference simulator receives an excitation signal from a signal detection unit, and performs delay modulation, Doppler modulation and power modulation on the received excitation signal; The delay modulation is used to realize the delay caused by the radial distance between the simulated installed radio frequency jammer and the tested seeker; The Doppler modulation is used to realize the Doppler frequency deviation caused by the radial velocity of the simulated installed radio frequency jammer and the tested seeker; The power modulation is used to simulate the power of the signal transmitted by the test seeker received by the jammer in an actual field environment.

4. The semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 2, characterized in that: The power value of the input signal of the array feeding system is much smaller than the power value of the output signal of the installed RF jammer. The high-power signal output by the installed RF jammer is attenuated to a suitable power through a high-power attenuator and then output to the array feeding system.

5. The semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 2, characterized in that: The array feeding system simulates the power of the signal transmitted by the installed RF jammer received by the test seeker by controlling the output power of the installed RF jammer, and simulates the spatial angle between the installed RF jammer and the test seeker by angle control.

6. The semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 2, characterized in that: When the RF jammer is externally connected, the RF jammer needs to simulate the radial distance and radial speed between the RF jammer and the seeker under test, as well as the power of the signal transmitted by the seeker under test received by the RF jammer; The radial distance between the simulated jammer and the test seeker is simulated by delaying the input signal: In the formula, τ is the range delay, R is the radial distance between the installed RF jammer and the test seeker, and C is the speed of light; The Doppler frequency deviation of the simulated jammer and the test seeker is simulated by Doppler modulation of the input signal: In the formula, f d is the Doppler frequency, v is the radial velocity between the jammer and the seeker under test, and λ is the wavelength of the signal transmitted by the seeker under test; By controlling the power of the output signal of the RF interference simulator, the power of the signal transmitted by the test seeker received by the jammer in the actual field environment can be simulated: Where P rj is the transmit power of the test seeker received by the jammer, P t is the transmitting power of the test seeker, G t is the antenna gain of the test seeker, G r is the jammer receiving antenna gain, λ is the wavelength of the signal transmitted by the test seeker, and R is the radial distance between the jammer and the test seeker.

7. The semi-physical simulation test device for connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 2, characterized in that: The array feeding system is used to simulate the transmission power of the signal transmitted by the installed RF jammer to the antenna aperture of the test seeker, and modulate the power of the input signal: Where P r is the received signal power of the antenna aperture of the tested seeker, P tj is the jammer transmission power, G r is the jammer receiving antenna gain, λ is the wavelength of the signal transmitted by the test seeker, and R is the radial distance between the jammer and the test seeker.

8. A semi-physical simulation test method for connecting a real radio frequency jammer to a darkroom, characterized in that: The test method is implemented based on the test device described in claim 7, and comprises the following steps: Step 1: Connect the simulation device and the test product; Step 2: The test master control system binds the conventional test parameters and the working parameters required by the external installed RF jammer; Step 3: After the test begins, the RF interference simulator calculates and controls the signal based on the radial distance, radial velocity and spatial angle relationship between the jammer and the test seeker given by the test master control system, and realizes the simulation of the relative time delay between the jammer output signal and the test seeker transmission signal, the Doppler frequency deviation of the jammer output signal relative to the test seeker transmission, and the power of the test seeker transmission signal received by the jammer through calculation and signal control; Step 4: The array feed system channel connected to the installed RF jammer calculates and modulates the power of the input signal to simulate the signal power output from the jammer to the antenna aperture of the test seeker according to the radial distance and spatial angle relationship between the jammer and the test seeker given by the test master control system; Step 5: The installed RF jammer detects and sorts the received signals, selects the corresponding jamming strategy and outputs the jamming signal to complete the assessment and verification of the anti-jamming performance of the radar-guided weapon.

9. The semi-physical simulation test method of connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 8, characterized in that: In step 2, the test master control system binds conventional test parameters including: working parameters of the test seeker, simulated target parameters, clutter parameters, and interference parameters.

10. The semi-physical simulation test method of connecting a real-installed radio frequency jammer to a darkroom as claimed in claim 8, characterized in that: The operating parameters required for the externally installed radio frequency jammer in step 2 include: antenna pattern parameters and transmission power.

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