Test evaluation method and system based on radar air detection function level simulation model

Abstract

The invention provides a radar-to-air detection function level simulation model-based test evaluation method and system, and relates to the technical field of aerospace, and the method comprises the steps: editing a combat scene and combat platform attributes through a simulation control module, completing the registration of a simulation model, and generating a simulation scene deployment file; the performance evaluation test module evaluates a beam detection function and a power detection function according to a radar detection result; the evaluation of the beam detection function is realized by judging whether a target azimuth angle is within a radar beam irradiation range or not; the evaluation of the power detection function is realized by judging whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio; the evaluation of the speed detection function is realized by judging whether the radial speed of the target is located in a radar zero-crossing detection blind area and a maximum relative speed range or not; the evaluation of the air-to-air target detection precision performance is realized by judging whether a radar detection target position error and a target speed error are within a radar detection precision range or not.

Description

Technical Field

[0001] The present invention relates to aerospace technology, and in particular to a test and evaluation method and system based on a radar air detection functional level simulation model. Background Art

[0002] Radar digital simulation is currently divided into two forms: signal-level simulation and function-level simulation. Signal-level simulation can more realistically reproduce the characteristics and performance of the radar system in the signal processing link through signal waveform information stimulation from the signal domain perspective. The processing flow is completely consistent with the airborne radar. However, due to the large amount of waveform information and the large amount of processing content, the PC platform cannot guarantee its real-time and accuracy due to differences in hardware performance. Summary of the invention

[0003] The embodiment of the present invention provides a test and evaluation method and system based on a radar air detection functional level simulation model, which is aimed at the verification requirements of the diversified detection functions, diversified detection targets, and refined detection performance of the radar digital model. By developing a test and evaluation system based on the radar air detection functional level simulation model, combat scenarios are flexibly constructed, simulation excitations are injected, and the detection characteristics of the radar model in a complex battlefield environment are analyzed in real time from aspects such as beam detection, power detection, speed detection, and accuracy detection. The test requirements for the air-to-air detection processing flow and detection performance of the radar model in the digital simulation stage are solved, and the air-to-air detection performance of the radar digital model is effectively evaluated and verified in the digital simulation stage, thereby shortening the radar product development cycle.

[0004] According to a first aspect of the embodiments of the present invention,

[0005] Provides a test and evaluation method based on radar air detection functional level simulation model, including:

[0006] The combat scene and combat platform attributes are edited through the simulation control module, the registration of the simulation model is completed and a simulation scene deployment file is generated; the simulation control module completes the initialization of the simulation excitation model and the radar model according to the simulation scene deployment file, issues operation instructions, and periodically drives each module of the simulation environment to operate; the simulation excitation module periodically sends the carrier flight information and the target flight information to the radar model;

[0007] The performance evaluation test module evaluates the beam detection function and the power detection function according to the radar detection results; wherein the evaluation of the beam detection function is realized by judging whether the target azimuth is within the radar beam illumination range; the evaluation of the power detection function is realized by judging whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio;

[0008] The performance evaluation test module evaluates the speed detection function and the air-to-air target detection accuracy performance according to the radar detection results; wherein, the speed detection function is evaluated by determining whether the target radial velocity is within the radar zero-crossing detection blind area and the maximum relative velocity range; the air-to-air target detection accuracy performance is evaluated by determining whether the radar detection target position error and the target velocity error are within the radar detection accuracy range.

[0009] In an optional embodiment,

[0010] The carrier aircraft flight information and target flight information include carrier aircraft position, target position, carrier aircraft speed, target speed, carrier aircraft attitude and target attitude; the radar model periodically sends radar detection results to the performance evaluation test module.

[0011] In an optional embodiment,

[0012] The method further comprises:

[0013] Receiving aircraft position information and target position information, wherein the aircraft position information includes aircraft longitude, aircraft latitude and aircraft altitude, and the target position information includes target longitude, target latitude and target altitude;

[0014] The azimuth and elevation angles of the target relative to the carrier are calculated according to the carrier position information and the target position information, wherein the calculation formula of the azimuth is as follows:

[0015] A AZ =arctan2(sin(lon2-lon1)*cos(lat2),cos(lat1)*sin(lat2)–sin(lat1)*cos(lat2)*

[0016] cos(lon2-lon1));

[0017] The pitch angle is calculated as follows:

[0018]

[0019] D=R*arccos(sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(lon2-lon1);

[0020] Among them, A AZ represents the azimuth, (lon1, lat1, h1) represent the longitude, latitude and altitude of the carrier position information, and (lon2, lat2, h2) represent the longitude, latitude and altitude of the target position information; A PIrepresents the pitch angle, D represents the distance from the radar to the target, and R represents the radius of the earth;

[0021] In an optional embodiment,

[0022] The evaluation of the beam detection function is achieved by determining whether the target azimuth is within the radar beam illumination range, including:

[0023] receiving radar beam parameters, the radar beam parameters including a radar scanning azimuth center, a radar scanning elevation center, a radar scanning azimuth width, and a radar scanning elevation range; comparing the azimuth angle with the radar scanning azimuth center and the radar scanning azimuth width, and comparing the elevation angle with the radar scanning elevation center and the radar scanning elevation range, to determine whether the target is within the radar beam illumination range;

[0024] The radar beam detection function is evaluated according to whether the target is within the radar beam illumination range and the radar detection result, wherein:

[0025] When the target is within the irradiation range of the radar beam and the radar detection result shows that the target is output normally, it is determined to be qualified; when the target is not within the irradiation range of the radar beam and the radar detection result shows that the target is not output and the return beam detection fails, it is determined to be qualified;

[0026] When the target is within the irradiation range of the radar beam and the radar detection result shows that the target is not output, it is judged as unqualified; when the target is not within the irradiation range of the radar beam and the radar detection result shows that the target is output, it is judged as unqualified.

[0027] In an optional embodiment,

[0028] The power detection function is evaluated by determining whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio, including:

[0029] Receive radar received signal power calculation parameters, and calculate the radar received signal power according to the radar received signal power calculation parameters. The calculation formula of the radar received signal power is:

[0030]

[0031] Among them, P r is the radar received signal power, P t is the average radiated power of the radar, G t is the transmitting antenna gain, λ is the radar wavelength, σ t is the target cross-sectional area, and D is the distance from the radar to the target;

[0032] A target signal-to-noise ratio calculation parameter is received, and a target signal-to-noise ratio is calculated according to the radar received signal power and the target signal-to-noise ratio calculation parameter. The calculation formula of the target signal-to-noise ratio is:

[0033]

[0034] Among them, SNR is the target signal-to-noise ratio, P av is the average radiation power, M is the number of accumulation points, J is the pulse pressure gain, L Σ is the total loss of the radar system, k is the Boltzmann constant, T0 is the standard noise temperature, B d is the Doppler filter bandwidth, F n is the noise factor, C is the clutter power;

[0035] The radar power detection function is evaluated by comparing the target signal-to-noise ratio with the minimum detectable signal-to-noise ratio in the radar configuration parameter table, where:

[0036] When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model outputs the target normally, it is determined to be qualified; when the target signal-to-noise ratio is less than or equal to the minimum detectable signal-to-noise ratio and the radar model does not output the target and the return power detection fails, it is determined to be qualified;

[0037] When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model does not output the target, it is determined to be unqualified; when the target signal-to-noise ratio is less than or equal to the minimum detectable signal-to-noise ratio and the radar model outputs the target, it is determined to be unqualified.

[0038] In an optional embodiment,

[0039] The evaluation of the speed detection function is achieved by judging whether the target radial speed is within the radar zero-crossing detection blind area and the maximum relative speed range, including:

[0040] Receive aircraft position parameters and aircraft speed parameters, the aircraft position parameters include aircraft longitude, aircraft latitude, and aircraft altitude, and the aircraft speed parameters include aircraft north speed, aircraft east speed, and aircraft celestial speed; receive target position parameters and target speed parameters, the target position parameters include target longitude, target latitude, and target altitude, and the target speed parameters include target north speed, target east speed, and target celestial speed;

[0041] According to the position parameters of the carrier aircraft and the position parameters of the target, the coordinates of the carrier aircraft and the target in the geodetic coordinate system are calculated, and the calculation formula is:

[0042]

[0043] Where R is the radius of the earth, E is the curvature of the earth, (lon1, lat1, h1) represent the longitude, latitude and altitude of the carrier position information, and (lon2, lat2, h2) represent the longitude, latitude and altitude of the target position information;

[0044] According to the carrier speed parameter, the target speed parameter and the earth coordinate system coordinate, the relative speed vector and the relative position vector between the carrier and the target are calculated through the coordinate conversion matrix; the radial approach speed is calculated according to the relative speed vector and the relative position vector, and the calculation formula of the radial approach speed is:

[0045]

[0046] Among them, V a is the radial approach speed, V x 、V y 、V z is the relative velocity vector component, dx, dy, dz are the relative position vector components, and D is the distance between the carrier and the target;

[0047] The radial approach speed is compared with a preset zero-crossing detection blind zone speed range and a maximum relative speed range to evaluate the radar speed detection function, wherein:

[0048] When the radial approach speed is within the maximum relative speed range and is not within the zero-crossing detection blind zone speed range, if the radar model outputs target information normally, it is determined to be qualified, otherwise it is determined to be unqualified;

[0049] When the radial approach speed is within the speed range of the zero-crossing detection blind zone, if the radar model cannot output target information and the reason for the output failure is that the target is within the zero-crossing detection blind zone, it is determined to be qualified, otherwise it is determined to be unqualified;

[0050] When the radial approach speed exceeds the maximum relative speed range, if the radar model cannot output target information and the reason for the output failure is that the target is outside the maximum relative speed range, it is determined to be qualified, otherwise it is determined to be unqualified.

[0051] In an optional embodiment,

[0052] The air-to-air target detection accuracy performance is evaluated by determining whether the radar detection target position error and target speed error are within the radar detection accuracy range, including:

[0053] Acquire radar detection target location parameters, the radar detection target location parameters include radar detection target latitude, radar detection target longitude and radar detection target altitude; acquire target real location parameters, the target real location parameters include target real latitude, target real longitude and target real altitude; calculate radar detection target distance error according to the radar detection target location parameters and the target real location parameters;

[0054] Acquire radar detection target speed parameters, wherein the radar detection target speed parameters include the radar detection target north speed, the radar detection target sky speed, and the radar detection target east speed; acquire target real speed parameters, wherein the target real speed parameters include the target real north speed, the target real sky speed, and the target real east speed; calculate the radar detection target speed error according to the radar detection target speed parameters and the target real speed parameters;

[0055] The radar target detection distance error is compared with a preset radar detection distance accuracy threshold, and the radar target detection speed error is compared with a preset radar detection speed accuracy threshold. When the radar target detection distance error is less than the radar detection distance accuracy threshold and the radar target detection speed error is less than the radar detection speed accuracy threshold, the radar air-to-air target detection accuracy performance is judged to be qualified, otherwise it is judged to be unqualified.

[0056] According to a second aspect of the embodiments of the present invention,

[0057] Provide a test and evaluation system based on the radar air detection functional level simulation model, including: simulation excitation module, simulation control module and performance evaluation test module;

[0058] The simulation excitation module is used to provide the radar digital simulation model with aircraft flight data excitation and flight data and detection performance parameters of the detected target;

[0059] The simulation control module is used to initialize the scene deployment of the combat scene and control the driving simulation environment to run the deduction;

[0060] The performance evaluation module is used to visualize the radar detection performance according to the results output by the radar performance simulation model, intuitively present the radar data processing process and data change trend, and analyze and evaluate the detection performance of the radar model.

[0061] According to a third aspect of the embodiments of the present invention,

[0062] An electronic device is provided, comprising:

[0063] processor;

[0064] a memory for storing processor-executable instructions;

[0065] The processor is configured to call the instructions stored in the memory to execute the aforementioned method.

[0066] A fourth aspect of the embodiments of the present invention is:

[0067] A computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the aforementioned method is implemented.

[0068] The beneficial effects of this application are as follows:

[0069] The problem of lack of means to verify the air-to-air detection performance of radar models in the digital simulation verification stage is solved. By constructing complex simulation scenarios and typical targets, the air-to-air detection performance of the radar digital model is analyzed from multiple dimensions, which shortens the radar model verification cycle and improves the efficiency of radar simulation verification. This helps researchers evaluate the radar air-to-air detection performance. The method is applicable to engineering practice and is effective and feasible. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a flow chart of a test and evaluation method based on a radar air detection function level simulation model according to an embodiment of the present invention;

[0071] Figure 2 It is a schematic diagram of the architecture of a test and evaluation system based on a radar air detection functional level simulation model according to an embodiment of the present invention;

[0072] Figure 3 It is a structural schematic diagram of a test and evaluation system based on a radar air detection functional level simulation model according to an embodiment of the present invention. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0075] Figure 1 FIG. 1 is a flow chart of a test and evaluation method based on a radar air detection function level simulation model according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0076] S101. Edit the combat scenario and combat platform attributes through the simulation control module, complete the registration of the simulation model and generate a simulation scenario deployment file; the simulation control module completes the initialization of the simulation excitation model and the radar model according to the simulation scenario deployment file, issues an operation instruction, and periodically drives each module of the simulation environment to run; the simulation excitation module periodically sends the carrier flight information and the target flight information to the radar model;

[0077] S102. The performance evaluation test module evaluates the beam detection function and the power detection function according to the radar detection result; wherein the evaluation of the beam detection function is realized by judging whether the target azimuth is within the radar beam illumination range; the evaluation of the power detection function is realized by judging whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio;

[0078] S103. The performance evaluation test module evaluates the speed detection function and the air-to-air target detection accuracy performance according to the radar detection results; wherein, the speed detection function is evaluated by determining whether the target radial velocity is within the radar zero-crossing detection blind spot and the maximum relative velocity range; the air-to-air target detection accuracy performance is evaluated by determining whether the radar detection target position error and target velocity error are within the radar detection accuracy range.

[0079] In an optional embodiment,

[0080] The carrier aircraft flight information and target flight information include carrier aircraft position, target position, carrier aircraft speed, target speed, carrier aircraft attitude and target attitude; the radar model periodically sends radar detection results to the performance evaluation test module.

[0081] In an optional embodiment,

[0082] The method further comprises:

[0083] Receiving aircraft position information and target position information, wherein the aircraft position information includes aircraft longitude, aircraft latitude and aircraft altitude, and the target position information includes target longitude, target latitude and target altitude;

[0084] The azimuth and elevation angles of the target relative to the carrier are calculated according to the carrier position information and the target position information, wherein the calculation formula of the azimuth is as follows:

[0085] A AZ =arctan2(sin(lon2-lon1)*cos(lat2),cos(lat1)*sin(lat2)–sin(lat1)*cos(lat2)*

[0086] cos(lon2-lon1));

[0087] The pitch angle is calculated as follows:

[0088]

[0089] D=R*arccos(sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(lon2-lon1);

[0090] Among them, A AZ represents the azimuth, (lon1, lat1, h1) represent the longitude, latitude and altitude of the carrier position information, and (lon2, lat2, h2) represent the longitude, latitude and altitude of the target position information; A PI represents the pitch angle, D represents the distance from the radar to the target, and R represents the radius of the earth;

[0091] In an optional embodiment,

[0092] The evaluation of the beam detection function is achieved by determining whether the target azimuth is within the radar beam illumination range, including:

[0093] receiving radar beam parameters, the radar beam parameters including a radar scanning azimuth center, a radar scanning elevation center, a radar scanning azimuth width, and a radar scanning elevation range; comparing the azimuth angle with the radar scanning azimuth center and the radar scanning azimuth width, and comparing the elevation angle with the radar scanning elevation center and the radar scanning elevation range, to determine whether the target is within the radar beam illumination range;

[0094] The radar beam detection function is evaluated according to whether the target is within the radar beam illumination range and the radar detection result, wherein:

[0095] When the target is within the irradiation range of the radar beam and the radar detection result shows that the target is output normally, it is determined to be qualified; when the target is not within the irradiation range of the radar beam and the radar detection result shows that the target is not output and the return beam detection fails, it is determined to be qualified;

[0096] When the target is within the irradiation range of the radar beam and the radar detection result shows that the target is not output, it is judged as unqualified; when the target is not within the irradiation range of the radar beam and the radar detection result shows that the target is output, it is judged as unqualified.

[0097] In an optional embodiment,

[0098] The power detection function is evaluated by determining whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio, including:

[0099] Receive radar received signal power calculation parameters, and calculate the radar received signal power according to the radar received signal power calculation parameters. The calculation formula of the radar received signal power is:

[0100]

[0101] Among them, P r is the radar received signal power, P t is the average radiated power of the radar, G t is the transmitting antenna gain, λ is the radar wavelength, σ t is the target cross-sectional area, and D is the distance from the radar to the target;

[0102] A target signal-to-noise ratio calculation parameter is received, and a target signal-to-noise ratio is calculated according to the radar received signal power and the target signal-to-noise ratio calculation parameter. The calculation formula of the target signal-to-noise ratio is:

[0103]

[0104] Among them, SNR is the target signal-to-noise ratio, P av is the average radiation power, M is the number of accumulation points, J is the pulse pressure gain, L Σ is the total loss of the radar system, k is the Boltzmann constant, T0 is the standard noise temperature, B d is the Doppler filter bandwidth, F n is the noise factor, C is the clutter power;

[0105] The radar power detection function is evaluated by comparing the target signal-to-noise ratio with the minimum detectable signal-to-noise ratio in the radar configuration parameter table, where:

[0106] When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model outputs the target normally, it is determined to be qualified; when the target signal-to-noise ratio is less than or equal to the minimum detectable signal-to-noise ratio and the radar model does not output the target and the return power detection fails, it is determined to be qualified;

[0107] When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model does not output the target, it is determined to be unqualified; when the target signal-to-noise ratio is less than or equal to the minimum detectable signal-to-noise ratio and the radar model outputs the target, it is determined to be unqualified.

[0108] In an optional embodiment,

[0109] The evaluation of the speed detection function is achieved by judging whether the target radial speed is within the radar zero-crossing detection blind area and the maximum relative speed range, including:

[0110] Receive aircraft position parameters and aircraft speed parameters, the aircraft position parameters include aircraft longitude, aircraft latitude, and aircraft altitude, and the aircraft speed parameters include aircraft north speed, aircraft east speed, and aircraft celestial speed; receive target position parameters and target speed parameters, the target position parameters include target longitude, target latitude, and target altitude, and the target speed parameters include target north speed, target east speed, and target celestial speed;

[0111] According to the position parameters of the carrier aircraft and the position parameters of the target, the coordinates of the carrier aircraft and the target in the geodetic coordinate system are calculated, and the calculation formula is:

[0112]

[0113] Where R is the radius of the earth, E is the curvature of the earth, (lon1, lat1, h1) represent the longitude, latitude and altitude of the carrier position information, and (lon2, lat2, h2) represent the longitude, latitude and altitude of the target position information;

[0114] According to the carrier speed parameter, the target speed parameter and the earth coordinate system coordinate, the relative speed vector and the relative position vector between the carrier and the target are calculated through the coordinate conversion matrix; the radial approach speed is calculated according to the relative speed vector and the relative position vector, and the calculation formula of the radial approach speed is:

[0115]

[0116] Among them, V a is the radial approach speed, V x 、V y 、V z is the relative velocity vector component, dx, dy, dz are the relative position vector components, and D is the distance between the carrier and the target;

[0117] The radial approach speed is compared with a preset zero-crossing detection blind zone speed range and a maximum relative speed range to evaluate the radar speed detection function, wherein:

[0118] When the radial approach speed is within the maximum relative speed range and is not within the zero-crossing detection blind zone speed range, if the radar model outputs target information normally, it is determined to be qualified, otherwise it is determined to be unqualified;

[0119] When the radial approach speed is within the speed range of the zero-crossing detection blind zone, if the radar model cannot output target information and the reason for the output failure is that the target is within the zero-crossing detection blind zone, it is determined to be qualified, otherwise it is determined to be unqualified;

[0120] When the radial approach speed exceeds the maximum relative speed range, if the radar model cannot output target information and the reason for the output failure is that the target is outside the maximum relative speed range, it is determined to be qualified, otherwise it is determined to be unqualified.

[0121] In an optional embodiment,

[0122] The air-to-air target detection accuracy performance is evaluated by determining whether the radar detection target position error and target speed error are within the radar detection accuracy range, including:

[0123] Acquire radar detection target location parameters, the radar detection target location parameters include radar detection target latitude, radar detection target longitude and radar detection target altitude; acquire target real location parameters, the target real location parameters include target real latitude, target real longitude and target real altitude; calculate radar detection target distance error according to the radar detection target location parameters and the target real location parameters;

[0124] Acquire radar detection target speed parameters, wherein the radar detection target speed parameters include the radar detection target north speed, the radar detection target sky speed, and the radar detection target east speed; acquire target real speed parameters, wherein the target real speed parameters include the target real north speed, the target real sky speed, and the target real east speed; calculate the radar detection target speed error according to the radar detection target speed parameters and the target real speed parameters;

[0125] The radar target detection distance error is compared with a preset radar detection distance accuracy threshold, and the radar target detection speed error is compared with a preset radar detection speed accuracy threshold. When the radar target detection distance error is less than the radar detection distance accuracy threshold and the radar target detection speed error is less than the radar detection speed accuracy threshold, the radar air-to-air target detection accuracy performance is judged to be qualified, otherwise it is judged to be unqualified.

[0126] Another embodiment of the present application is as follows:

[0127] The present application also provides a schematic diagram of the architecture of a test and evaluation system based on a radar air detection functional level simulation model, such as Figure 2As shown in the figure, it is mainly divided into three parts: simulation excitation module, simulation control module and performance evaluation module. The simulation excitation module mainly provides the radar digital simulation model with aircraft flight data excitation, flight data of the detected target and detection performance parameters; the simulation control module can initialize the scene deployment of the combat scene and control the driving simulation environment to run the deduction; the performance evaluation module can visualize the radar detection performance according to the output results of the radar performance simulation model, intuitively present the radar data processing process and data change trend, and analyze and evaluate the detection performance of the radar model.

[0128] In response to the verification needs of diversified detection functions, diversified detection targets, and refined detection performance of radar digital models, by developing a test and evaluation system based on the radar air detection functional-level simulation model, flexible construction of combat scenarios, injection of simulation excitation, real-time analysis of the radar model's detection characteristics in complex battlefield environments from aspects such as beam detection, power detection, speed detection, and accuracy detection, the test needs for the radar model's air-to-air detection processing flow and detection performance in the digital simulation stage are met, the air-to-air detection performance of the radar digital model is effectively evaluated and verified in the digital simulation stage, and the radar product development cycle is shortened.

[0129] Step 1: The simulation control module edits the scene and combat platform attributes, sets the initialization scene to 1V5 radar detection, completes the model registration of the carrier and target aircraft, and generates the simulation scene deployment file. The initialization information of each platform is as follows:

[0130]

[0131] Step 2: According to the simulation scenario deployment file in step 1, the simulation control module completes the initialization of the carrier aircraft (including the radar digital model) and the five target aircraft models in the simulation excitation module, issues operation instructions, and periodically drives the operation of each module in the simulation environment;

[0132] Step 3: According to the driving instruction of step 2, the simulation excitation module periodically sends the carrier flight information and the target flight information to the radar performance digital simulation model. The flight information should include the carrier / target position (longitude, latitude, altitude), carrier / target speed (northward speed, celestial speed, eastward speed, ground speed), carrier / target attitude (azimuth, pitch angle, roll angle), and the radar performance simulation model periodically sends the radar detection results to the performance evaluation test module;

[0133] Step 4: According to the detection result output by the radar model in step 3, the beam detection function of the radar performance simulation model is evaluated (the radar detection beam performance of this embodiment is ±60° in azimuth and ±60° in elevation). The test shows that as the simulation progresses, the azimuth of target 1 relative to the carrier gradually increases. When the relative azimuth of target 1 is less than ±60°, the radar can output the target. When the relative azimuth of the target is greater than ±60°, the radar cannot output the target and the reason for failure is beam detection failure, which is determined to be qualified; the elevation angle of target 2 relative to the carrier gradually increases. When the relative elevation angle of target 1 is less than ±60°, the radar can output the target. When the relative elevation angle of the target is greater than ±60°, the radar cannot output the target and the reason for failure is beam detection failure, which is determined to be qualified;

[0134] Step 5: According to the radar detection output result of step 4, the power detection function of the performance simulation model is evaluated (the radar detection range of this embodiment is not less than 300km for the detection distance of 5㎡). The test shows that as the simulation progresses, the distance of target 5 relative to the carrier aircraft gradually decreases. When the distance is greater than 300km, the radar model cannot output the target and the reason for the return failure is power detection failure. When the distance is less than 300km, the radar can output the target normally and is judged to be qualified.

[0135] Step 6: According to the detection result output by the radar model in step 3, the speed detection function of the performance simulation model is evaluated by setting different relative flight speeds between the carrier and the target (the radar filtering detection blind area in this embodiment is (-25m / s, +25m / s), and the speed blind area is (-∞, -380m / s)∪(1000m / s, +∞)). The test shows that as the simulation progresses, the speed of target 3 relative to the carrier is less than 25m / s, and the radar model cannot output the information of target 3 all the time, and the reason for the output failure is that the target is in the zero-crossing detection blind area; the speed of target 4 relative to the carrier is less than -380m / s, and the radar model cannot output the information of target 4 all the time, and the reason for the return failure is that the target is outside the maximum relative speed range, and it is judged to be qualified;

[0136] Step 7: According to the detection results output by the radar model in step 3, the air-to-air target detection accuracy performance of the performance simulation model is evaluated by setting different combat scenarios (in this embodiment, the distance accuracy error is set to be no higher than 30m, and the speed accuracy error is set to be no higher than 2m / s). The test shows that as the simulation progresses, when the radar successfully detects target 5, the average accuracy error is no higher than 30m / s, and the average speed error is no higher than 2m / s, which is judged to be qualified.

[0137] Figure 3 FIG. 1 is a schematic diagram of the structure of a test and evaluation system based on a radar air detection functional level simulation model according to an embodiment of the present invention. Figure 3As shown, the system includes: a simulation excitation module, a simulation control module and a performance evaluation test module;

[0138] The simulation excitation module is used to provide the radar digital simulation model with aircraft flight data excitation and flight data and detection performance parameters of the detected target;

[0139] The simulation control module is used to initialize the scene deployment of the combat scene and control the driving simulation environment to run the deduction;

[0140] The performance evaluation module is used to visualize the radar detection performance according to the results output by the radar performance simulation model, intuitively present the radar data processing process and data change trend, and analyze and evaluate the detection performance of the radar model.

[0141] According to a third aspect of the embodiments of the present invention,

[0142] An electronic device is provided, comprising:

[0143] processor;

[0144] a memory for storing processor-executable instructions;

[0145] The processor is configured to call the instructions stored in the memory to execute the aforementioned method.

[0146] A fourth aspect of the embodiments of the present invention is:

[0147] A computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the aforementioned method is implemented.

[0148] The present invention may be a method, an apparatus, a system and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for executing various aspects of the present invention.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test and evaluation method based on a radar air detection functional level simulation model, characterized in that: The method comprises: The combat scene and combat platform attributes are edited through the simulation control module, the registration of the simulation model is completed and a simulation scene deployment file is generated; the simulation control module completes the initialization of the simulation excitation model and the radar model according to the simulation scene deployment file, issues operation instructions, and periodically drives each module of the simulation environment to operate; the simulation excitation module periodically sends the carrier flight information and the target flight information to the radar model; The performance evaluation test module evaluates the beam detection function and the power detection function according to the radar detection results; wherein the evaluation of the beam detection function is realized by judging whether the target azimuth is within the radar beam illumination range; the evaluation of the power detection function is realized by judging whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio; The performance evaluation test module evaluates the speed detection function and the air-to-air target detection accuracy performance according to the radar detection results; wherein, the speed detection function is evaluated by determining whether the target radial velocity is within the radar zero-crossing detection blind area and the maximum relative velocity range; the air-to-air target detection accuracy performance is evaluated by determining whether the radar detection target position error and the target velocity error are within the radar detection accuracy range.

2. The method according to claim 1, characterized in that The carrier aircraft flight information and target flight information include carrier aircraft position, target position, carrier aircraft speed, target speed, carrier aircraft attitude and target attitude; the radar model periodically sends radar detection results to the performance evaluation test module.

3. The method according to claim 1, characterized in that: The method further comprises: Receiving aircraft position information and target position information, wherein the aircraft position information includes aircraft longitude, aircraft latitude and aircraft altitude, and the target position information includes target longitude, target latitude and target altitude; The azimuth and elevation angles of the target relative to the carrier are calculated according to the carrier position information and the target position information, wherein the calculation formula of the azimuth is as follows: TO AZ =arctan2(sin(lon2-lon1)*cos(lat2),cos(lat1)*sin(lat2)–sin(lat1)*cos(lat2)* cos(lon2-lon1)); The pitch angle is calculated as follows: D=R*arccos(sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(lon2-lon1)); Among them, A AZ represents the azimuth, (lon1, lat1, h1) represent the longitude, latitude and altitude of the carrier position information, and (lon2, lat2, h2) represent the longitude, latitude and altitude of the target position information; A PI represents the elevation angle, D represents the distance between the radar and the target, and R represents the radius of the earth.

4. The method according to claim 3, characterized in that: The evaluation of the beam detection function is achieved by determining whether the target azimuth is within the radar beam illumination range, including: receiving radar beam parameters, the radar beam parameters including a radar scanning azimuth center, a radar scanning elevation center, a radar scanning azimuth width, and a radar scanning elevation range; comparing the azimuth angle with the radar scanning azimuth center and the radar scanning azimuth width, and comparing the elevation angle with the radar scanning elevation center and the radar scanning elevation range, to determine whether the target is within the radar beam illumination range; The radar beam detection function is evaluated according to whether the target is within the radar beam illumination range and the radar detection result, wherein: When the target is within the irradiation range of the radar beam and the radar detection result shows that the target is output normally, it is determined to be qualified; when the target is not within the irradiation range of the radar beam and the radar detection result shows that the target is not output and the return beam detection fails, it is determined to be qualified; When the target is within the irradiation range of the radar beam and the radar detection result shows that the target is not output, it is judged as unqualified; when the target is not within the irradiation range of the radar beam and the radar detection result shows that the target is output, it is judged as unqualified.

5. The method according to claim 1, characterized in that The power detection function is evaluated by determining whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio, including: Receive radar received signal power calculation parameters, and calculate the radar received signal power according to the radar received signal power calculation parameters. The calculation formula of the radar received signal power is: Among them, P r is the radar received signal power, P t is the average radiated power of the radar, G t is the transmitting antenna gain, λ is the radar wavelength, σ t is the target cross-sectional area, and D is the distance from the radar to the target; A target signal-to-noise ratio calculation parameter is received, and a target signal-to-noise ratio is calculated according to the radar received signal power and the target signal-to-noise ratio calculation parameter. The calculation formula of the target signal-to-noise ratio is: Among them, SNR is the target signal-to-noise ratio, P av is the average radiation power, M is the number of accumulation points, J is the pulse pressure gain, L Σ is the total loss of the radar system, k is the Boltzmann constant, T0 is the standard noise temperature, B d is the Doppler filter bandwidth, F n is the noise factor, C is the clutter power; The radar power detection function is evaluated by comparing the target signal-to-noise ratio with the minimum detectable signal-to-noise ratio in the radar configuration parameter table, where: When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model outputs the target normally, it is determined to be qualified; when the target signal-to-noise ratio is less than or equal to the minimum detectable signal-to-noise ratio and the radar model does not output the target and the return power detection fails, it is determined to be qualified; When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model does not output the target, it is determined to be unqualified; when the target signal-to-noise ratio is less than or equal to the minimum detectable signal-to-noise ratio and the radar model outputs the target, it is determined to be unqualified.

6. The method according to claim 1, characterized in that The evaluation of the speed detection function is achieved by judging whether the target radial speed is within the radar zero-crossing detection blind area and the maximum relative speed range, including: Receive aircraft position parameters and aircraft speed parameters, the aircraft position parameters include aircraft longitude, aircraft latitude, and aircraft altitude, and the aircraft speed parameters include aircraft north speed, aircraft east speed, and aircraft celestial speed; receive target position parameters and target speed parameters, the target position parameters include target longitude, target latitude, and target altitude, and the target speed parameters include target north speed, target east speed, and target celestial speed; According to the position parameters of the carrier aircraft and the position parameters of the target, the coordinates of the carrier aircraft and the target in the geodetic coordinate system are calculated, and the calculation formula is: Where R is the radius of the earth, E is the curvature of the earth, (lon1, lat1, h1) represent the longitude, latitude and altitude of the carrier position information, and (lon2, lat2, h2) represent the longitude, latitude and altitude of the target position information; According to the carrier speed parameter, the target speed parameter and the earth coordinate system coordinate, the relative speed vector and the relative position vector between the carrier and the target are calculated through the coordinate conversion matrix; the radial approach speed is calculated according to the relative speed vector and the relative position vector, and the calculation formula of the radial approach speed is: Among them, V a is the radial approach speed, V x 、V y 、V z is the relative velocity vector component, dx, dy, dz are the relative position vector components, and D is the distance between the carrier and the target; The radial approach speed is compared with a preset zero-crossing detection blind zone speed range and a maximum relative speed range to evaluate the radar speed detection function, wherein: When the radial approach speed is within the maximum relative speed range and is not within the zero-crossing detection blind zone speed range, if the radar model outputs target information normally, it is determined to be qualified, otherwise it is determined to be unqualified; When the radial approach speed is within the speed range of the zero-crossing detection blind zone, if the radar model cannot output target information and the reason for the output failure is that the target is within the zero-crossing detection blind zone, it is determined to be qualified, otherwise it is determined to be unqualified; When the radial approach speed exceeds the maximum relative speed range, if the radar model cannot output target information and the reason for the output failure is that the target is outside the maximum relative speed range, it is determined to be qualified, otherwise it is determined to be unqualified.

7. The method according to claim 1, characterized in that The air-to-air target detection accuracy performance is evaluated by determining whether the radar detection target position error and target speed error are within the radar detection accuracy range, including: Acquire radar detection target location parameters, the radar detection target location parameters include radar detection target latitude, radar detection target longitude and radar detection target altitude; acquire target real location parameters, the target real location parameters include target real latitude, target real longitude and target real altitude; calculate radar detection target distance error according to the radar detection target location parameters and the target real location parameters; Acquire radar detection target speed parameters, wherein the radar detection target speed parameters include the radar detection target north speed, the radar detection target sky speed, and the radar detection target east speed; acquire target real speed parameters, wherein the target real speed parameters include the target real north speed, the target real sky speed, and the target real east speed; calculate the radar detection target speed error according to the radar detection target speed parameters and the target real speed parameters; The radar target detection distance error is compared with a preset radar detection distance accuracy threshold, and the radar target detection speed error is compared with a preset radar detection speed accuracy threshold. When the radar target detection distance error is less than the radar detection distance accuracy threshold and the radar target detection speed error is less than the radar detection speed accuracy threshold, the radar air-to-air target detection accuracy performance is judged to be qualified, otherwise it is judged to be unqualified.

8. A test and evaluation system based on a radar air detection functional level simulation model, used to implement the method described in any one of claims 1 to 7, characterized in that: The system includes a simulation excitation module, a simulation control module and a performance evaluation test module; The simulation excitation module is used to provide the radar digital simulation model with aircraft flight data excitation and flight data and detection performance parameters of the detected target; The simulation control module is used to initialize the scene deployment of the combat scene and control the driving simulation environment to run the deduction; The performance evaluation module is used to visualize the radar detection performance according to the results output by the radar performance simulation model, intuitively present the radar data processing process and data change trend, and analyze and evaluate the detection performance of the radar model.

9. An electronic device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to call the instructions stored in the memory to execute the method described in any one of claims 1 to 7.

10. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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