Chaff jamming multi-domain simulation system and method

Abstract

The application provides a foil jamming multi-domain simulation system and method, comprising a signal source, a noise source, a synthesis module, a switch module and an antenna array; noise spectrum output by the noise source and signal spectrum output by the signal source are superimposed in a frequency domain through the synthesis module, wherein the signal spectrum is located in a frequency band of the noise spectrum; the switch module controls opening and closing of energy of multiple channels of foil bombs in real time, time domain simulation of sequentially launching multiple foil bombs is realized according to a launching time sequence of the multiple channels of foil bombs; the antenna array controls position change of the foil jamming in space in real time, space domain simulation of sequentially launching multiple foil bombs is realized according to different angular positions of the foil bombs. The application simulates instead of field flight, thereby reducing a test cost of an anti-jamming index of a guidance control system and shortening a test time.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of guided control semi-physical simulation, in particular, to a chaff jamming multi-domain simulation system and method. Especially, the present application is suitable for simulating chaff jamming in a semi-physical simulation system, providing a realistic electromagnetic environment for a guided control system, and evaluating the anti-jamming performance of the guided control system. BACKGROUND

[0002] The basic architecture of the semi-physical simulation system is designed around the simulation verification requirements of the trial guided control system. For radio frequency guided systems of different systems, the semi-physical simulation system is required to accurately simulate the echo signal of the target according to the working mode of the radio frequency guided system. The echo signal should include the electromagnetic scattering or reflection characteristics of the target, as well as the distance and position information, etc.

[0003] With the increasing complexity of modern battlefield electronic environment, chaff jamming has the advantages of low cost and easy use, and has gradually become the most widely used radar passive jamming method. Under normal circumstances, the movement of chaff in the air can be divided into two stages: the first stage is from the launch of the chaff bomb to the arrival at the explosion point. In this stage, the motion trajectory of the chaff is relatively simple and the speed attenuation is small; the second stage is that the chaff bomb is quickly formed into a chaff cloud distributed in a certain range after being exploded in the air, and the chaff gradually becomes uniform motion in the vertical direction under the action of gravity and air lift.

[0004] In the semi-physical simulation system of radio frequency guidance, the conventional chaff jamming simulation method is to simulate chaff jamming by using random signals, which can only simulate the echo signal after the chaff jamming is completely scattered, and can only reflect part of the characteristics of chaff jamming. It cannot fully reflect the whole formation process of chaff jamming, and cannot simulate the multi-domain variation characteristics of chaff jamming such as frequency domain, time domain and space domain, and cannot reflect the real chaff jamming performance. For example, the patent document CN110850376A discloses a kind of chaff jamming simulation method and chaff jamming simulator, which generates chaff jamming filter coefficients based on chaff electromagnetic characteristics; then generates echo coefficients with chaff jamming characteristics online; and then generates chaff jamming simulation signals. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a chaff jamming multi-domain simulation system and method.

[0006] According to the chaff jamming multi-domain simulation system provided by the present application, the signal source, the noise source, the synthesis module, the switch module and the antenna array are included.

[0007] The noise spectrum output by the noise source and the signal spectrum output by the signal source are superimposed in the frequency domain by the synthesis module, wherein the signal spectrum is located in the frequency band of the noise spectrum.

[0008] The switch module controls the opening and closing of the energy of multiple channel chaffs in real time, and realizes time domain simulation of the sequential launching of multiple chaffs according to the launching time sequence of the multiple channel chaffs.

[0009] The antenna array controls the position change of the chaff jamming in space in real time, and realizes space domain simulation of the sequential launching of multiple chaffs according to different chaff angular positions.

[0010] Preferably, the noise spectrum and the signal spectrum are superimposed to form the frequency spectrum of the chaff jamming, the frequency spectrum characteristics are controlled through the noise source and the signal source according to the real-time changes of the chaff movement speed, the scattering state and the target characteristics, and the frequency domain characteristic simulation is realized.

[0011] Preferably, the frequency spectrum characteristics of the noise spectrum include a center frequency, a bandwidth and a power.

[0012] The center frequency of the noise spectrum changes in real time according to the chaff movement speed.

[0013] The bandwidth of the noise spectrum changes in real time according to the scattering state of the chaff.

[0014] The power of the noise spectrum changes in real time according to the target characteristics of the chaff.

[0015] Preferably, the signal spectrum type output by the signal source is a single spectrum line, and the frequency spectrum characteristics of the signal spectrum include a frequency and a power.

[0016] The frequency of the signal spectrum changes in real time according to the chaff movement speed.

[0017] The power of the signal spectrum changes in real time according to the radar scattering area and the relative distance of the chaff.

[0018] Preferably, the process from the launching to the complete scattering of the chaff is simulated.

[0019] According to the chaff jamming multi-domain simulation method provided by the application, a signal source, a noise source, a synthesis module, a switch module and an antenna array are arranged.

[0020] The noise spectrum output by the noise source and the signal spectrum output by the signal source are superimposed in the frequency domain through the synthesis module, wherein the signal spectrum is located in the frequency band of the noise spectrum.

[0021] The switch module controls the opening and closing of the energy of multiple channel chaffs in real time, and realizes time domain simulation of the sequential launching of multiple chaffs according to the launching time sequence of the multiple channel chaffs.

[0022] The antenna array controls the position change of the chaff jamming in space in real time, and realizes space domain simulation of the sequential launching of multiple chaffs according to different chaff angular positions.

[0023] Preferably, the noise spectrum and the signal spectrum are superimposed to form a spectrum of the chaff interference, and the spectrum characteristics are controlled by the noise source and the signal source according to real-time changes of the chaff movement speed, the scattering state and the target characteristics, so as to realize the frequency domain characteristic simulation.

[0024] Preferably, the spectrum characteristics of the noise spectrum include a center frequency, a bandwidth and a power.

[0025] The center frequency of the noise spectrum changes in real time according to the chaff movement speed.

[0026] The bandwidth of the noise spectrum changes in real time according to the scattering state of the chaff.

[0027] The power of the noise spectrum changes in real time according to the target characteristics of the chaff.

[0028] Preferably, the signal spectrum output by the signal source is a single spectrum line, and the spectrum characteristics of the signal spectrum include a frequency and a power.

[0029] The frequency of the signal spectrum changes in real time according to the chaff movement speed.

[0030] The power of the signal spectrum changes in real time according to the radar scattering area and the relative distance of the chaff.

[0031] Preferably, the process from the launching to the complete scattering of the chaff bomb is simulated.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] 1. The present application aims to realize the multi-domain simulation of the chaff interference in the radio frequency guidance semi-physical simulation test, and can completely simulate the process from the launching to the complete scattering of a single chaff bomb, and can also realize the simulation of the frequency domain change, the time sequence change and the spatial position change of the launching process of multiple chaff bombs.

[0034] 2. The present application has the ability to simulate the multi-domain characteristics of any chaff interference in the frequency domain, the time domain and the spatial domain, and provides a realistic interference signal for the anti-interference performance verification of the guidance control system.

[0035] 3. The present application simulates instead of the field flight, thereby reducing the test cost of the anti-interference index of the guidance control system and shortening the test time, greatly reducing the cost of the actual flight and the cost of the field test. DETAILED DESCRIPTION

[0036] Other characteristics, objects and advantages of the present application will become more apparent through reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 A principle schematic diagram of a chaff interference multi-domain simulation system provided by the present application. Detailed Implementation

[0038] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0039] This invention provides a multi-domain simulation system for chaff interference, capable of simulating the frequency, spatial, and temporal characteristics of chaff interference from deployment to complete dispersion. The spectrum of chaff interference consists of a superposition of noise and signal spectra. Based on the real-time changes in chaff velocity, dispersion state, and target characteristics calculated by the chaff interference model, frequency domain characteristics are simulated through spectral characteristic control using noise and signal sources. Temporal domain characteristics are simulated by controlling the on / off state of chaff energy using a switching module and calculating different chaff deployment sequences. Spatial domain characteristics are simulated by radiating energy at different spatial locations using an antenna array and calculating the angular positions of different chaff projectiles based on the model.

[0040] This invention provides a multi-domain simulation system for foil interference, such as... Figure 1 As shown, the system includes: a signal source, a noise source, a synthesis module, a switching module, and an antenna array; the noise source outputs a noise spectrum, and the signal source outputs a signal spectrum. After the two are passed through the synthesis module, they are superimposed in the frequency domain, and the signal spectrum is located within the frequency band of the noise spectrum; the noise spectrum type output by the noise source can be frequency-modulated noise, smart noise, etc.

[0041] The spectral characteristics of the noise spectrum include center frequency, bandwidth, and power; among them, the center frequency of the noise spectrum changes in real time according to the motion speed calculated by the chaff interference model, the bandwidth of the noise spectrum changes in real time according to the chaff scattering state calculated by the chaff interference model, and the power of the noise spectrum changes in real time according to the target characteristics calculated by the chaff interference model.

[0042] The signal spectrum output by the signal source is a single spectral line, and the spectral characteristics of the signal spectrum include frequency and power. The frequency of the signal spectrum changes in real time according to the moving speed calculated by the chaff interference model, and the power of the signal spectrum changes in real time according to the radar scattering area and relative distance calculated by the chaff interference model.

[0043] The switch module is used to control the opening and closing of the energy of multiple channels of chaff in real time. Based on the multi-channel chaff deployment sequence calculated by the chaff interference model, the time-domain simulation of the sequential deployment of multiple chaff is realized.

[0044] The antenna array is used to control the spatial position changes of chaff interference in real time. Based on the different chaff bullet angle positions calculated by the chaff interference model, the spatial simulation of multiple chaff bullets being deployed sequentially is realized.

[0045] From the above technical solutions, the chaff jamming echo simulation system for guiding and controlling semi-physical simulation test is provided, so that the actual flight is simulated to reduce the test cost of the anti-jamming index of the guiding and controlling system and shorten the test time, greatly reducing the cost of actual flight, the chaff jamming echo signal is generated according to the related parameters (initial speed, simulated maximum RCS area) of the chaff jamming, the change characteristics of the chaff jamming from the launching to the stable dispersion in the frequency domain, time domain and space domain can be simulated, unlimited chaff jamming can be simulated by using limited semi-physical simulation channels, and the utilization rate of semi-physical simulation resources is greatly improved. The electromagnetic environment required for the simulation of the anti-jamming performance of the guiding and controlling system is realistic, and the cost of the field test is greatly reduced.

[0046] Those skilled in the art know that, in addition to the system, device and each module thereof provided by the software part of the present application in the form of pure computer readable program code, the same program can be realized in the form of logic gate, switch, special integrated circuit, programmable logic controller and embedded microcontroller by logically programming the method steps. Therefore, the system, device and each module thereof provided by the present application can be considered as a hardware component, and the modules included therein for realizing various programs can also be considered as structures in the hardware component; the modules for realizing various functions can also be considered as both software programs for realizing the method and structures in the hardware component.

[0047] The present application also provides a chaff jamming multi-domain simulation method, comprising: setting a signal source, a noise source, a synthesis module, a switch module and an antenna array; the noise spectrum output by the noise source and the signal spectrum output by the signal source are superimposed in the frequency domain by the synthesis module, wherein the signal spectrum is located in the frequency band of the noise spectrum; the switch module is used to control the opening and closing of the energy of multiple channel chaff projectiles in real time, and the time domain simulation of the sequential launching of multiple chaff projectiles is realized according to the launching time sequence of the multiple channel chaff projectiles; and the antenna array is used to control the position change of the chaff jamming in space in real time, and the space domain simulation of the sequential launching of multiple chaff projectiles is realized according to the angle positions of different chaff projectiles.

[0048] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A foil strip decoy multi-domain analog system, characterized by, It comprises: a signal source, a noise source, a synthesis module, a switch module, and an antenna array; a noise spectrum output by the noise source and a signal spectrum output by the signal source are superimposed in a frequency domain by the synthesis module, wherein the signal spectrum is located in a frequency band of the noise spectrum; the switch module controls opening and closing of energy of multiple channels of chaff in real time, and time domain simulation of sequentially launching multiple chaffs is realized according to a launching time sequence of the multiple channels of chaff; the antenna array controls position change of the chaff in space in real time, and space domain simulation of sequentially launching multiple chaffs is realized according to different angular positions of the multiple chaffs; spectrum characteristics of the noise spectrum include a center frequency, a bandwidth, and power; the center frequency of the noise spectrum changes in real time according to a chaff movement speed; the bandwidth of the noise spectrum changes in real time according to a chaff scattering state; the power of the noise spectrum changes in real time according to a chaff target characteristic; a signal spectrum type output by the signal source is a single spectrum line, and spectrum characteristics of the signal spectrum include a frequency and power; the frequency of the signal spectrum changes in real time according to the chaff movement speed; the power of the signal spectrum changes in real time according to a chaff radar scattering area and a relative distance; multi-domain simulation of chaff jamming is realized in a radio frequency guidance semi-physical simulation test.

2. The foil strip disruptor multi-domain analog system of claim 1, wherein, The noise spectrum and the signal spectrum are superimposed to form a spectrum of chaff jamming, spectrum characteristics are controlled by the noise source and the signal source according to real-time changes of the chaff movement speed, the chaff scattering state, and the target characteristic, and frequency domain characteristic simulation is realized.

3. The foil strip decoy multi-domain analog system of claim 1, wherein, A process of the chaff from launching to complete scattering is simulated.

4. A method of foil strip jamming multi-domain simulation, characterized in that, It comprises: a signal source, a noise source, a synthesis module, a switch module, and an antenna array; a noise spectrum output by the noise source and a signal spectrum output by the signal source are superimposed in a frequency domain by the synthesis module, wherein the signal spectrum is located in a frequency band of the noise spectrum; the switch module controls opening and closing of energy of multiple channels of chaff in real time, and time domain simulation of sequentially launching multiple chaffs is realized according to a launching time sequence of the multiple channels of chaff; the antenna array controls position change of the chaff in space in real time, and space domain simulation of sequentially launching multiple chaffs is realized according to different angular positions of the multiple chaffs; spectrum characteristics of the noise spectrum include a center frequency, a bandwidth, and power; the center frequency of the noise spectrum changes in real time according to a chaff movement speed; the bandwidth of the noise spectrum changes in real time according to a chaff scattering state; the power of the noise spectrum changes in real time according to a chaff target characteristic; a signal spectrum type output by the signal source is a single spectrum line, and spectrum characteristics of the signal spectrum include a frequency and power; the frequency of the signal spectrum changes in real time according to the chaff movement speed; the power of the signal spectrum changes in real time according to a chaff radar scattering area and a relative distance.

5. The foil strip jamming multi-domain analog method of claim 4, wherein, The noise spectrum and the signal spectrum are superimposed to form a spectrum of chaff jamming, spectrum characteristics are controlled by the noise source and the signal source according to real-time changes of the chaff movement speed, the chaff scattering state, and the target characteristic, and frequency domain characteristic simulation is realized.

6. The foil strip jamming multi-domain analog method of claim 4, wherein, A process of the chaff from launching to complete scattering is simulated.

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