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

Abstract

The application provides a test evaluation method and system based on a radar air detection function level simulation model, relates to the technical field of aerospace, and comprises the following steps: editing a combat scene and combat platform attributes through a simulation control module, completing registration of a simulation model and generating a simulation scene deployment file; a 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 located in a radar beam irradiation range; the evaluation of the power detection function is realized by judging whether a target signal-to-noise ratio is greater than a minimum detectable signal-to-noise ratio; the evaluation of a speed detection function is realized by judging whether a target radial speed is located in a radar zero-crossing detection blind area and a maximum relative speed range; and the evaluation of air-to-air target detection precision performance is realized by judging whether a radar detected target position error and a target speed error are within a radar detection precision range.

Description

TECHNICAL FIELD

[0001] The present application relates to aerospace technology, and in particular to a method and system for testing and evaluating a radar air detection function level simulation model. BACKGROUND

[0002] Radar digital simulation currently mainly includes signal level simulation and function level simulation, the signal level simulation stimulates through signal waveform information from the signal domain, can more realistically reproduce the characteristics and performance of the radar system in the signal processing link, the processing flow is completely consistent with the airborne radar, but due to the large amount of waveform information and the multiple processing contents, the PC platform cannot guarantee the real-time performance and accuracy due to the hardware performance difference. SUMMARY

[0003] The embodiment of the present application provides a method and system for testing and evaluating a radar air detection function level simulation model, aiming at the verification requirements of diversified radar digital model detection functions, diversified detection targets and refined detection performance, by developing a testing and evaluation system based on the radar air detection function level simulation model, flexibly constructing a combat scene, injecting simulation excitation, and analyzing the detection characteristics of the radar model in a complex battlefield environment from the aspects of beam detection, power detection, speed detection and precision detection, the testing requirements of the radar model air detection processing flow and detection performance in the digital simulation stage are solved, the air detection performance of the radar digital model in the digital simulation stage is effectively evaluated and verified, and the radar product development cycle is shortened.

[0004] A first aspect of the embodiment of the present application,

[0005] The method for testing and evaluating a radar air detection function level simulation model is provided, comprising:

[0006] The simulation control module edits the combat scene and the combat platform attributes, completes the registration of the simulation model and generates a simulation scene deployment file, the simulation control module initializes the simulation excitation model and the radar model according to the simulation scene deployment file, issues a running instruction, and periodically drives the simulation environment modules to run, and the simulation excitation module periodically sends the target 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 result, wherein the evaluation of the beam detection function is realized by judging whether the target azimuth is located in the radar beam illumination range or not, and 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 or not;

[0008] The performance evaluation test module evaluates the speed detection function and the air-to-air target detection precision performance according to the radar detection result; wherein the evaluation of the speed detection function is realized by judging whether the target radial velocity is located in the radar zero-crossing detection blind area and the maximum relative velocity range; and the evaluation of the air-to-air target detection precision performance is realized by judging whether the radar detection target position error and the target speed error are within the radar detection precision range.

[0009] In an alternative embodiment,

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

[0011] In an alternative 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 height, and the target position information includes target longitude, target latitude and target height;

[0014] Calculating the azimuth angle and the pitch angle of the target relative to the aircraft according to the aircraft position information and the target position information, wherein the calculation formula of the azimuth angle 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 calculation formula of the pitch angle is as follows:

[0018]

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

[0020] Wherein, A AZ represents the azimuth angle, (lon1, lat1, h1) represents the longitude, latitude and height of the aircraft position information respectively, and (lon2, lat2, h2) represents the longitude, latitude and height of the target position information; A PIwhere D represents the distance from the radar to the target, and R represents the radius of the earth;

[0021] In an alternative embodiment,

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

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

[0024] evaluating the radar beam detection function 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 radar beam illumination range and the radar detection result shows that a target is normally output, it is determined to be qualified; when the target is not within the radar beam illumination range and the radar detection result shows that a target is not output and the return beam detection fails, it is determined to be qualified;

[0026] when the target is within the radar beam illumination range and the radar detection result shows that a target is not output, it is determined to be unqualified; when the target is not within the radar beam illumination range and the radar detection result shows that a target is output, it is determined to be unqualified.

[0027] In an alternative embodiment,

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

[0029] receiving radar received signal power calculation parameters, calculating the radar received signal power according to the radar received signal power calculation parameters, and the calculation formula of the radar received signal power is:

[0030]

[0031] where P is the radar received signal power, P is the radar average radiation power, G is the transmitting antenna gain, λ is the radar wavelength, σ is the target cross-sectional area, and D is the distance from the radar to the target. r t t t

[0032] ​​​​receiving a target signal-to-noise ratio calculation parameter, calculating a target signal-to-noise ratio 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 being:

[0033]

[0034] wherein SNR is the target signal-to-noise ratio, P av is the average radiation power, M is the accumulation point number, J is the pulse compression 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 figure, and C is the clutter power.

[0035] comparing the target signal-to-noise ratio with a minimum detectable signal-to-noise ratio in a radar configuration parameter table to evaluate the radar power detection function, wherein,

[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 normally outputs the target, 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 velocity is located in the radar zero-crossing detection blind area and the maximum relative velocity range, comprising:

[0040] receiving a carrier position parameter and a carrier speed parameter, the carrier position parameter comprising carrier longitude, carrier latitude and carrier altitude, and the carrier speed parameter comprising carrier northward speed, carrier eastward speed and carrier skyward speed; receiving a target position parameter and a target speed parameter, the target position parameter comprising target longitude, target latitude and target altitude, and the target speed parameter comprising target northward speed, target eastward speed and target skyward speed;

[0041] calculating the coordinates of the carrier and the target in the geodetic coordinate system according to the carrier position parameter and the target position parameter, the calculation formula being:

[0042]

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

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

[0045]

[0046] Wherein, V a is the radial approach speed, V x , V y , V z are relative speed vector components, dx, dy and dz are relative position vector components, and D is the distance between the aircraft and the target.

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

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

[0049] When the radial approach speed is located in the zero-crossing detection blind area speed range, if the radar model cannot output the target information and the output failure reason is that the target is in the zero-crossing detection blind area, 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 the target information and the output failure reason 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 implementation,

[0052] The evaluation of the air-to-air target detection accuracy performance is realized by judging whether the radar detected target position error and target speed error are in the radar detection accuracy range, and includes:

[0053] acquire radar detection target position parameters, the radar detection target position parameters including radar detection target latitude, radar detection target longitude and radar detection target height; acquire target real position parameters, the target real position parameters including target real latitude, target real longitude and target real height; calculate radar detection target distance error according to the radar detection target position parameters and the target real position parameters;

[0054] acquire radar detection target speed parameters, the radar detection target speed parameters including radar detection target northward speed, radar detection target skyward speed and radar detection target eastward speed; acquire target real speed parameters, the target real speed parameters including target real northward speed, target real skyward speed and target real eastward speed; calculate radar detection target speed error according to the radar detection target speed parameters and the target real speed parameters;

[0055] compare the radar detection target distance error with a preset radar detection distance precision threshold value, compare the radar detection target speed error with a preset radar detection speed precision threshold value, when the radar detection target distance error is less than the radar detection distance precision threshold value and the radar detection target speed error is less than the radar detection speed precision threshold value, determine that radar air-to-air target detection precision performance is qualified, otherwise, determine that it is unqualified.

[0056] a second aspect of the embodiment of the application,

[0057] provide a test evaluation system based on a radar air detection function level simulation model, comprising: a simulation excitation module, a simulation control module and a performance evaluation test module;

[0058] the simulation excitation module is used for providing aircraft flight data excitation and flight data and detection performance parameters of the detection target for the radar digital simulation model;

[0059] the simulation control module is used for initializing scene deployment on the combat scene and controlling driving simulation environment to run deduction;

[0060] the performance evaluation module is used for visually displaying radar detection performance according to the result output by the radar performance simulation model, intuitively presenting radar data processing process and data change trend, and analyzing and evaluating the detection performance of the radar model.

[0061] a third aspect of the embodiment of the application,

[0062] provide an electronic device, comprising:

[0063] a processor;

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

[0065] The processor is configured to invoke instructions stored in the memory to perform the method described above.

[0066] A fourth aspect of the embodiments of the present application,

[0067] A computer readable storage medium is provided, and computer program instructions are stored on the computer readable storage medium, and the computer program instructions are executed by a processor to implement the method described above.

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

[0069] The problem of lacking radar model air-to-air detection performance verification means in the digital simulation verification stage is solved, the air-to-air detection performance of the radar digital model is analyzed from multiple dimensions by constructing a complex simulation scene and typical targets, the radar model verification period is shortened, the radar simulation verification efficiency is improved, which is helpful for researchers to evaluate the radar air-to-air detection performance, and is suitable for engineering practice, and the method is effective and feasible. BRIEF DESCRIPTION OF DRAWINGS

[0070] Figure 1 A flowchart of a test and evaluation method for a radar air-to-air detection function level simulation model based on the embodiments of the present application is shown in the figure.

[0071] Figure 2 A schematic diagram of the architecture of a test and evaluation system for a radar air-to-air detection function level simulation model based on the embodiments of the present application is shown in the figure.

[0072] Figure 3 A schematic diagram of the structure of a test and evaluation system for a radar air-to-air detection function level simulation model based on the embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0073] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

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

[0075] Figure 1 A flowchart of a test and evaluation method for a radar air-to-air detection function level simulation model based on the embodiments of the present application is shown in the figure, Figure 1 as shown. The method comprises:

[0076] S101. The combat scene and combat platform attributes are edited by a simulation control module, the simulation model is registered and a simulation scene deployment file is generated; the simulation control module initializes the simulation excitation model and the radar model according to the simulation scene deployment file, issues a running instruction, and periodically drives each module of the simulation environment to run; the simulation excitation module periodically sends the aircraft 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 located in 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 result; wherein the evaluation of the speed detection function is realized by judging whether the target radial velocity is located in the radar zero-crossing detection blind area and the maximum relative velocity range; the evaluation of the air-to-air target detection accuracy performance is realized by judging whether the radar detection target position error and the target speed error are within the radar detection accuracy range.

[0079] In an optional implementation,

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

[0081] In an optional implementation,

[0082] The method further includes:

[0083] Receiving aircraft position information and target position information, the aircraft position information including aircraft longitude, aircraft latitude, and aircraft height, and the target position information including target longitude, target latitude, and target height;

[0084] Calculating the target azimuth relative to the aircraft and the target pitch angle according to the aircraft 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) * cos (lon2-lon1))

[0086] cos(lon2-lon1)) ;

[0087] The calculation formula of the pitch angle is as follows:

[0088]

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

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

[0091] In an alternative embodiment,

[0092] The evaluation of the beam detection function is achieved by judging whether the target azimuth angle is located in the radar beam illumination range, comprising:

[0093] receiving radar beam parameters, the radar beam parameters including a radar scanning azimuth center, a radar scanning pitch center, a radar scanning azimuth width and a radar scanning pitch range; comparing the azimuth angle with the radar scanning azimuth center and the radar scanning azimuth width, comparing the pitch angle with the radar scanning pitch center and the radar scanning pitch range, and judging whether the target is located in the radar beam illumination range;

[0094] According to whether the target is located in the radar beam illumination range and the radar detection result, the radar beam detection function is evaluated, wherein,

[0095] when the target is located in the radar beam illumination range and the radar detection result shows that the normal output target, it is determined to be qualified; when the target is not located in the radar beam illumination range 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 located in the radar beam illumination range and the radar detection result shows that the target is not output, it is determined to be unqualified; when the target is not located in the radar beam illumination range and the radar detection result shows that the target is output, it is determined to be unqualified.

[0097] In an alternative embodiment,

[0098] The evaluation of the power detection function is achieved by judging whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio, and comprises:

[0099] Receiving a radar received signal power calculation parameter, calculating the radar received signal power according to the radar received signal power calculation parameter, and the calculation formula of the radar received signal power is:

[0100]

[0101] Wherein, P r is the radar received signal power, P t is the average radar radiation power, 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] Receiving a target signal-to-noise ratio calculation parameter, calculating the target signal-to-noise ratio according to the radar received signal power and the target signal-to-noise ratio calculation parameter, and the calculation formula of the target signal-to-noise ratio is:

[0103]

[0104] Wherein, SNR is the target signal-to-noise ratio, P av is the average radiation power, M is the accumulation point number, J is the pulse compression 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, and C is the clutter power.

[0105] According to the comparison between the target signal-to-noise ratio and the minimum detectable signal-to-noise ratio in the radar configuration parameter table, the radar power detection function is evaluated, wherein,

[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 normally outputs the target, 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 implementation,

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

[0110] receiving carrier position parameters and carrier velocity parameters, the carrier position parameters including carrier longitude, carrier latitude, carrier height, and the carrier velocity parameters including carrier northward velocity, carrier eastward velocity, and carrier skyward velocity; receiving target position parameters and target velocity parameters, the target position parameters including target longitude, target latitude, and target height, and the target velocity parameters including target northward velocity, target eastward velocity, and target skyward velocity;

[0111] calculating, according to the carrier position parameters and the target position parameters, geodetic coordinate system coordinates of the carrier and the target, with a calculation formula being:

[0112]

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

[0114] calculating, according to the carrier velocity parameters, the target velocity parameters and the geodetic coordinate system coordinates, a relative velocity vector and a relative position vector of the carrier and the target through a coordinate conversion matrix; and calculating a radial approach velocity according to the relative velocity vector and the relative position vector, with a calculation formula of the radial approach velocity being:

[0115]

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

[0117] comparing the radial approach velocity with a preset zero-crossing detection blind area velocity range and a maximum relative velocity range, and evaluating the radar velocity detection function, wherein,

[0118] when the radial approach velocity is located in the maximum relative velocity range and not in the zero-crossing detection blind area velocity range, if the radar model normally outputs target information, it is determined to be qualified, otherwise it is determined to be unqualified;

[0119] when the radial approach velocity is located in the zero-crossing detection blind area velocity range, if the radar model cannot output target information and the output failure reason is that the target is in the zero-crossing detection blind area, 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 output failure reason 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 evaluation of the air-to-air target detection accuracy performance is achieved by judging whether the radar detected target position error and target speed error are within the radar detection accuracy range, comprising:

[0123] Obtaining radar detected target position parameters, the radar detected target position parameters comprising radar detected target latitude, radar detected target longitude and radar detected target height; obtaining target real position parameters, the target real position parameters comprising target real latitude, target real longitude and target real height; calculating radar detected target distance error according to the radar detected target position parameters and the target real position parameters;

[0124] Obtaining radar detected target speed parameters, the radar detected target speed parameters comprising radar detected target northward speed, radar detected target skyward speed and radar detected target eastward speed; obtaining target real speed parameters, the target real speed parameters comprising target real northward speed, target real skyward speed and target real eastward speed; calculating radar detected target speed error according to the radar detected target speed parameters and the target real speed parameters;

[0125] Comparing the radar detected target distance error with a preset radar detected distance accuracy threshold value, comparing the radar detected target speed error with a preset radar detected speed accuracy threshold value, when the radar detected target distance error is less than the radar detected distance accuracy threshold value and the radar detected target speed error is less than the radar detected speed accuracy threshold value, determining that the radar air-to-air target detection accuracy performance is qualified, otherwise determining that it is 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 evaluation system based on a radar air detection function level simulation model, as shown in Figure 2As shown, it is mainly divided into three parts: simulation excitation module, simulation control module and performance evaluation module. The simulation excitation module mainly provides flight data excitation of the carrier aircraft and flight data and detection performance parameters of the detected target for the radar digital simulation model. 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 visually display the radar detection performance according to the results output by the radar performance simulation model, intuitively present the radar data processing process and data trend, and analyze and evaluate the detection performance of the radar model.

[0128] In view of the verification requirements of 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 function level simulation model, a combat scene is flexibly constructed, simulation excitation is injected, and the detection characteristics of the radar model in complex battlefield environment are analyzed in real time from the aspects of beam detection, power detection, speed detection and precision detection, so as to solve the test requirements of the radar model in the digital simulation stage in terms of air detection processing flow and detection performance, effectively evaluate and verify the air detection performance of the radar digital model in the digital simulation stage, and shorten the radar product development cycle.

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

[0130]

[0131] Step two: According to the simulation scene deployment file in step one, the simulation control module completes the initialization of the carrier aircraft (including the radar digital model) and the models of five target aircraft in the simulation excitation module, issues a running instruction, and periodically drives the running of each module of the simulation environment;

[0132] Step three: According to the driving instruction in step two, the simulation excitation module periodically sends the carrier aircraft flight information and 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, skyward speed, eastward speed, ground speed), carrier / target attitude (azimuth angle, pitch angle, roll angle), and the radar performance simulation model periodically sends the radar detection results to the performance evaluation test module;

[0133] Step four: according to the radar model output detection result of step three, the beam detection function of the radar performance simulation model is evaluated (the radar detection beam performance of the embodiment is azimuth angle ±60°, and elevation angle ±60°), and experiments show that, with simulation advancing, the relative azimuth angle of target 1 to the aircraft gradually increases, when the relative azimuth angle of target 1 is less than ±60°, the radar can output the target, when the relative azimuth angle of target 1 is greater than ±60°, the radar cannot output the target and the failure reason is beam detection failure, and it is determined to be qualified; the relative elevation angle of target 2 to the aircraft 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 target 1 is greater than ±60°, the radar cannot output the target and the failure reason is beam detection failure, and it is determined to be qualified;

[0134] Step five: according to the radar detection output result of step four, the power detection function of the performance simulation model is evaluated (the radar detection range of the embodiment is that the detection distance of 5 square meters is not less than 300 km), and experiments show that, with simulation advancing, the distance of target 5 to the aircraft gradually decreases, when the distance is greater than 300 km, the radar model cannot output the target and returns the failure reason of power detection failure, when the distance is less than 300 km, the radar can normally output the target, and it is determined to be qualified.

[0135] Step six: according to the radar model output detection result of step three, the speed detection function of the performance simulation model is evaluated by setting different relative flight speeds of the aircraft and the target (the zero-crossing detection blind area of the radar filtering detection of the embodiment is (-25 m / s, +25 m / s), and the speed blind area is (-∞, -380 m / s) ∪ (1000 m / s, +∞)), and experiments show that, with simulation advancing, the speed of target 3 relative to the aircraft is less than 25 m / s, the radar model cannot always output the information of target 3 and returns the failure reason that the target is in the zero-crossing detection blind area; the speed of target 4 relative to the aircraft is less than -380 m / s, the radar model cannot always output the information of target 4 and returns the failure reason that the target is outside the maximum relative speed range, and it is determined to be qualified;

[0136] Step seven: according to the radar model output detection result of step three, the air-to-air target detection accuracy performance of the performance simulation model is evaluated by setting different combat scenes (in the embodiment, the distance accuracy error is not higher than 30 m, and the speed accuracy error is not higher than 2 m / s), and experiments show that, with simulation advancing, when the radar successfully detects target 5, the average error of the accuracy is not higher than 30 m / s, and the average error of the speed is not higher than 2 m / s, and it is determined to be qualified.

[0137] Figure 3 The structure diagram of the test and evaluation system of the radar air detection function level simulation model based on the embodiment of the application is shown in Figure 3As shown, the system comprises: 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 the flight data excitation of an aircraft and the flight data and detection performance parameters of a detected target.

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

[0140] The performance evaluation module is used to visually display the radar detection performance according to the result 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] A third aspect of the embodiment of the application,

[0142] An electronic device is provided, comprising:

[0143] A processor;

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

[0145] The processor is configured to invoke the instructions stored in the memory to execute the method described above.

[0146] A fourth aspect of the embodiment of the application,

[0147] A computer-readable storage medium is provided, which stores computer program instructions, and the computer program instructions are executed by a processor to implement the method described above.

[0148] The present application can be a method, device, system and / or computer program product. The computer program product can include a computer readable storage medium having computer readable program instructions stored therein, which are used to perform various aspects of the present application.

[0149] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for testing and evaluating a function level simulation model of a radar air detection function, characterized in that, The method comprises: The simulation control module edits the combat scene and combat platform attributes, registers the simulation model, and generates a simulation scene deployment file; the simulation control module initializes the simulation excitation model and the radar model according to the simulation scene deployment file, issues a running instruction, and periodically drives each module of the simulation environment to run; the simulation excitation model periodically sends the aircraft 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 result; wherein, The target position information and the target position information are received, and the target azimuth angle and the target elevation angle relative to the aircraft are calculated according to the aircraft position information and the target position information; The evaluation of the beam detection function is realized by judging whether the target azimuth angle is located in the radar beam irradiation range, comprising: The radar beam parameters are received, the radar beam parameters comprising a radar scanning azimuth center, a radar scanning elevation center, a radar scanning azimuth width and a radar scanning elevation range; the azimuth angle is compared with the radar scanning azimuth center and the radar scanning azimuth width, and the elevation angle is compared with the radar scanning elevation center and the radar scanning elevation range, to judge whether the target is located in the radar beam irradiation range; The radar beam detection function is evaluated according to whether the target is located in the radar beam irradiation range and the radar detection result, wherein, When the target is located in the radar beam irradiation range and the radar detection result shows that the target is normally output, it is determined to be qualified; when the target is not located in the radar beam irradiation range 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 located in the radar beam irradiation range and the radar detection result shows that the target is not output, it is determined to be unqualified; when the target is not located in the radar beam irradiation range and the radar detection result shows that the target is output, it is determined to be unqualified; 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 result; wherein, the evaluation of the speed detection function is realized by judging whether the target radial velocity is located in the radar zero-crossing detection blind area and the maximum relative velocity range; the evaluation of the air-to-air target detection accuracy performance is realized by judging whether the radar detection target position error and the target speed error are within the radar detection accuracy range.

2. The method of claim 1, wherein, The aircraft flight information and the target flight information comprise the aircraft position, the target position, the aircraft speed, the target speed, the aircraft attitude and the target attitude; the radar model periodically sends the radar detection result to the performance evaluation test module.

3. The method of claim 1, wherein, The method further comprises: The aircraft position information and the target position information are received, the aircraft position information comprising the aircraft longitude, the aircraft latitude and the aircraft height, and the target position information comprising the target longitude, the target latitude and the target height; According to the carrier position information and the target position information, a target azimuth angle and a target elevation angle relative to the carrier are calculated, wherein the calculation formula of the azimuth angle is as follows: ； The calculation formula of the elevation angle is as follows: ； ）； wherein denotes an azimuth angle, , , ) denote the longitude, latitude and altitude of the carrier position information, respectively, , , ) denote the longitude, latitude and altitude of the target position information; denotes a pitch angle, D1 denotes the distance of the missile to the target, and R denotes the radius of the earth.

4. The method of claim 1, wherein, The evaluation of the power detection function is achieved by judging whether the target signal-to-noise ratio is greater than the minimum detectable signal-to-noise ratio, and includes: A radar received signal power calculation parameter is received, and radar received signal power is calculated according to the radar received signal power calculation parameter, and the calculation formula of the radar received signal power is as follows: ； wherein, is the radar received signal power, is the radar average radiated power, is the transmit antenna gain, is the radar wavelength, is the target cross-sectional area, and D1 is the radar range to the target. A target signal-to-noise ratio calculation parameter is received, and target signal-to-noise ratio is calculated according to the radar received signal power and the target signal-to-noise ratio calculation parameter, and the calculation formula of the target signal-to-noise ratio is as follows: ； wherein SNR is a target signal-to-noise ratio, is an average radiation power, M is an accumulation point number, and J is a pulse compression gain, is a total loss of a radar system, k is a Boltzmann constant, is a standard noise temperature, is a Doppler filter bandwidth, is a noise figure, and C is a clutter power; According to the comparison between the target signal-to-noise ratio and the minimum detectable signal-to-noise ratio in the radar configuration parameter table, the radar power detection function is evaluated, wherein, When the target signal-to-noise ratio is greater than or equal to the minimum detectable signal-to-noise ratio and the radar model normally outputs the target, 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 returns a power detection failure, 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.

5. The method of claim 1, wherein, The evaluation of the speed detection function is achieved by judging whether the target radial velocity is located in the radar zero-crossing detection blind area and the maximum relative velocity range, and includes: Carrier position parameters and carrier speed parameters are received, the carrier position parameters including carrier longitude, carrier latitude, carrier altitude, and the carrier speed parameters including carrier northward speed, carrier eastward speed and carrier skyward speed; target position parameters and target speed parameters are received, the target position parameters including target longitude, target latitude and target altitude, and the target speed parameters including target northward speed, target eastward speed and target skyward speed; According to the carrier position parameters and the target position parameters, the coordinates of the carrier and the target in the geodetic coordinate system are calculated, and the calculation formula is as follows: ； where R is the earth radius, E is the earth curvature, , , ) respectively represent the longitude, latitude and height of the carrier position information, , , ) represent the longitude, latitude and height of the target position information; According to the carrier speed parameters, the target speed parameters and the coordinates in the geodetic coordinate system, the relative speed vector and the relative position vector of the carrier and the target are calculated through a coordinate conversion matrix; and according to the relative speed vector and the relative position vector, the radial approach speed is calculated, and the calculation formula of the radial approach speed is as follows: ； wherein, is the radial approach velocity, , , is the relative velocity vector component, dx, dy, dz are the relative position vector components, D2 is the distance between the carrier and the target; The radial approach speed is compared with a preset zero-crossing detection blind area speed range and a maximum relative velocity range, and the radar speed detection function is evaluated, wherein, When the radial approach speed is located in the maximum relative velocity range and not in the zero-crossing detection blind area speed range, if the radar model normally outputs target information, it is determined to be qualified, otherwise it is determined to be unqualified; When the radial approach speed is located in the zero-crossing detection blind area speed range, if the radar model cannot output target information and the output failure reason is that the target is in the zero-crossing detection blind area, 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 output failure reason is that the target is outside the maximum relative speed range, it is determined to be qualified, otherwise it is determined to be unqualified.

6. The method of claim 1, wherein, The evaluation of the air-to-air target detection accuracy performance is achieved by judging whether the radar detected target position error and target speed error are within the radar detection accuracy range, comprising: obtaining radar detected target position parameters, the radar detected target position parameters including radar detected target latitude, radar detected target longitude and radar detected target height; obtaining target real position parameters, the target real position parameters including target real latitude, target real longitude and target real height; calculating radar detected target distance error according to the radar detected target position parameters and the target real position parameters; obtaining radar detected target speed parameters, the radar detected target speed parameters including radar detected target northward speed, radar detected target skyward speed and radar detected target eastward speed; obtaining target real speed parameters, the target real speed parameters including target real northward speed, target real skyward speed and target real eastward speed; calculating radar detected target speed error according to the radar detected target speed parameters and the target real speed parameters; comparing the radar detected target distance error with a preset radar detection distance accuracy threshold, comparing the radar detected target speed error with a preset radar detection speed accuracy threshold, when the radar detected target distance error is less than the radar detection distance accuracy threshold and the radar detected target speed error is less than the radar detection speed accuracy threshold, determining that the radar air-to-air target detection accuracy performance is qualified, otherwise determining that it is unqualified.

7. A test and evaluation system for radar air surveillance function level simulation models for implementing the method according to any one of the preceding claims 1 - 6, characterized in that The system comprises a simulation excitation module, a simulation control module and a performance evaluation test module; The simulation excitation module is used to provide aircraft flight data excitation and flight data and detection performance parameters of the detected target for the radar digital simulation model. The simulation control module is used to initialize scene deployment for the combat scene and control driving simulation environment to run deduction. The performance evaluation module is used to visually display 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.

8. An electronic device, comprising: comprise: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to execute the method of any one of claims 1 to 6.

9. A computer-readable storage medium having stored thereon computer program instructions, wherein, The computer program instructions are executed by the processor to implement the method of any one of claims 1 to 6. The computer program instructions are executed by the processor to implement the method of any one of claims 1 to 6.

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