CN115166659A - Three-coordinate radar array element-level flexible track target simulator - Google Patents
Three-coordinate radar array element-level flexible track target simulator Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
The invention is applied to the field of radar target simulation and discloses a three-coordinate radar array element-level flexible track target simulator. The method considers various external environments and use scenes, sets parameters according to requirements, utilizes real target radar echoes to simulate air and sea targets, gun-shot water columns, low-altitude helicopters, unmanned plane swarms, sea clutters and meteorological clutters, simulates movement tracks of various targets, reads track files or realizes flexible tracks according to movement of an operator mouse movement track, and meets the requirements of debugging, training, using, training and the like of multi-type radars and other equipment needing radar data. The invention can improve the debugging, training, using and training efficiency of the radar and other equipment needing radar data, saves manpower and material resources, improves the stability of the equipment and has higher economic benefit.
Description
Technical Field
The invention relates to the technical field of radar simulator simulation.
Background
The radar simulator is indispensable in the radar development and the joint debugging joint test process with peripheral electronic equipment, and the radar simulator in the past has single function, can simulate only a radar signal, and the use limitation is very big, and the target pattern of simulation is single moreover, and the target operation route is simple, and the target truth is not high.
The invention comprehensively considers the advantages and the disadvantages of the design of the traditional radar simulator, analyzes the requirements of the joint debugging joint test of the radar and the related electronic equipment, and also considers the aspects of the usability and the maintainability of the product, so as to design the radar simulator based on the advantages, greatly simplify the joint debugging joint test, the training and the training difficulty of the radar and the related electronic equipment, improve the working efficiency and save manpower and material resources.
Disclosure of Invention
The invention provides a three-coordinate radar array element-level flexible track target simulator, an operator can select various types of radar simulation, can set parameters according to requirements, can perform custom simulation, can simulate targets such as air and sea targets, gun-shot water columns, low-altitude helicopters, unmanned aerial vehicle swarms and the like by using data such as real target radar echoes, clutter noise, interference and the like, and simulate running tracks of various targets so as to meet the requirements of debugging, training, using, training and the like of various types of radars and other equipment needing radar data.
The invention provides a target simulator of three-coordinate radar array element-level flexible tracks, which adopts the technical scheme that:
comprises a hardware part and a software part; the hardware part comprises a cabinet, wherein a display screen, a switch, a switcher, a display control computer and a radar signal generating and processing computer are loaded in the cabinet; the display control computer is used for radar interface display control; the radar signal generating and processing computer is used for generating and processing radar echo signals, is internally provided with a Pdie board card and an external interface board card, and has the functions of inputting optical fiber data, outputting optical fibers, digital differential signals and analog signals; the software part comprises a signal generating unit, a signal processing unit, a data processing unit, a display control unit and an external interface unit; the signal generating unit simulates and generates radar array element level echo signals, radar echo signal data are generated according to radar parameters of different models and a real radar echo signal model, target echo signals are simulated according to echo characteristics of different targets, clutters and interferences, and then the radar signal processing unit carries out radar signal processing on the simulated radar echoes; the data processing unit processes data after signal processing, performs image processing on the fire control windowing, performs target identification on the motion characteristics and spectral characteristics of a target, and sends the processed data to the display control unit for processing; the display control unit is used for man-machine interaction, displaying radar echoes, sending processing commands and generating flexible target track files; and the external interface unit is used for outputting radar video data to other equipment.
Furthermore, the signal generating unit simulates and generates echo signals of radars of various types, superposes array element-level echo data of various real targets, clutter and interference which are collected and processed in advance, and predicts RCS (Radar Cross section) and motion states of the targets, the clutter and the interference to simulate the intensity and fluctuation of the echo signals; the signal processing unit is used for carrying out corresponding signal processing on the radar echo signal according to the selected analog radar model and the control command; the display control unit selects multiple types of radars to simulate, parameters of various types of radars are written in a program in advance or are obtained by reading files, and parameters can be set on a display control interface according to requirements to perform custom simulation; simulating various targets, and acquiring real echo data of the targets by reading a file; simulating various target motion tracks, reading track files or moving according to the mouse motion track of an operator; and the data processing unit processes the data after signal processing to generate a target point flight path, performs high-resolution imaging on the fire control windowing data, and identifies according to the target micro Doppler characteristics.
The invention has the beneficial effects that:
the invention can use a radar simulator to simulate radars of various models and can also customize the simulated radar of parameters; array element level radar echo signals of various different targets are simulated by using real echo data, so that the simulation fidelity and richness are high; the target flexible track can be simulated, various use requirements can be met, the difficulty of joint debugging, training and training of the radar and related electronic equipment is simplified, the working efficiency is improved, and manpower and material resources are saved. Greatly saves manpower and material resources and has certain economic efficiency.
Drawings
Fig. 1 is a working schematic diagram of a radar simulator.
Fig. 2 is a hardware diagram of a radar simulator.
The signals of fig. 3 produce a simulated target logic diagram.
Detailed Description
The invention is further explained below with reference to the figures and examples.
The invention provides a three-coordinate radar array element level flexible track target simulator, which comprises the following preferred embodiments:
the working principle of the simulator is shown in fig. 1, a target simulation process is initiated by a display control unit, an operator can select a radar model and a working mode to be simulated on a display control interface, a target state (such as a static point target and a moving point target), a target type (such as a ship, a helicopter, a civil aircraft, a fighter plane and a rotor unmanned plane), a target moving line (such as radial flight, tangential flight and flying according to a mouse marking track) option, display control software stores or reads a file mode in advance to obtain radar parameters, target state parameters, target real echo data and target running line data, display control software calculates primary reference information and copied target information according to radar antenna beam scanning characteristics and target moving tracks and each antenna rotating cycle, calculates the reference target position of the next antenna rotating cycle according to the moving characteristics of the target, calculates the position, distance, elevation angle, doppler, amplitude and other information of the reference target of the next antenna rotating cycle before the reference target position arrives, and sends the radar model, the target real echo data, the reference target parameter information, the copied target information and other information to a signal generation unit before the updated message position of the signal generation unit.
The signal generation unit is used for generating radar scanning directions and generating radar echo simulation array element level signals corresponding to the number of channels according to the display control command, wherein radar echo data of a simulation target can be real target radar echo array element level signals corresponding to radar models collected in advance or pure simulation radar echo array element level signals. And signal generation software loaded in the FPGA on the Pceie board card generates azimuth information corresponding to the rotation period of the antenna according to parameters such as the radar model, the working mode and the like. After initialization, generating a simulation direction matched with the working mode according to the rotating speed control code, and generating a period counter according to the current repetition period. The program updates the target parameters according to the target type, generates a reference target, calculates the copy target information on the distance and the direction, and generates a copy target. The target generation logic is as shown in fig. 3, when a target command is received, it is determined whether to update the target parameters of each circle, when the current position is equal to the updated position, the target parameters of the current circle are updated, otherwise, the parameters are maintained to the next circle to update the position. When the current pulse is finished, updating the parameters of the next pulse; otherwise, wait for the end of the pulse. Judging whether the target on the azimuth is generated completely, and when the azimuth target counter is equal to the number of the azimuth targets, judging that the current azimuth is equal to the next target azimuth, calculating the next azimuth target parameter; when the current position is judged to be larger than the next target position, judging whether the target on the distance is generated completely, and when the distance target counter is equal to the distance target number, judging that the current distance is equal to the next target distance, calculating the parameter information of the next target distance; when the current distance is judged to be larger than the next target distance, generating target data, and carrying out amplitude coefficient weighting on the generated target data; when the distance target counter is greater than the distance target number, the current pulse distance target generation is finished; and when the azimuth target counter is greater than the number of the azimuth targets, stopping generating the azimuth target.
The signal processing unit completes the receiving and analysis processing of the display control command, and carries out signal processing operations such as DBF, pulse compression, constant false alarm, MTI and the like on the radar array element level radar echo signal generated by the signal generating unit according to the command and parameters sent by display control, and the obtained simulated radar video data is sent to the display control unit and the data processing unit.
The data processing unit receives commands such as user recording, tracking, windowing and recognition and target information sent by the display and control unit through the network to perform data processing, generates point flight path information, target recognition results and windowed image data, and sends the point flight path information, the target recognition results and the windowed image data to the display and control unit through the network.
The external interface unit receives the analog radar video data and the radar scanning azimuth data sent by the signal processing unit, generates required information such as elevation angle video data and azimuth increment, and outputs the information to other equipment in the system through optical fibers, differential lines and radio frequency lines.
The flexible track is stored in a computer according to a track file generated by the flight track, the speed and the radar reflection area of a common aircraft, and track parameters are obtained by reading the file as required to generate the flexible track of the simulation target. The flexible track can be generated according to the fact that a user mouse draws lines on the display control interface, and the simulation target can run according to the lines drawn by the mouse.
Claims (5)
1. The utility model provides a flexible orbit target simulator of three-dimensional radar array element level which characterized in that: the target simulator comprises a hardware part and a software part; the hardware part comprises a cabinet, wherein a display screen, a switch, a switcher, a display control computer and a radar signal generating and processing computer are loaded in the cabinet; the display control computer is used for radar interface display control; the radar signal generating and processing computer is used for generating and processing radar echo signals, is internally provided with a Pdie board card and an external interface board card, and has the functions of inputting optical fiber data, outputting optical fibers, digital differential signals and analog signals; the software part comprises a signal generating unit, a signal processing unit, a data processing unit, a display control unit and an external interface unit; the signal generating unit simulates and generates radar array element level echo signals, radar echo signal data are generated according to radar parameters of different models and a real radar echo signal model, target echo signals are simulated according to echo characteristics of different targets, clutters and interferences, and then the radar signal processing unit carries out radar signal processing on the simulated radar echo signals; the data processing unit processes data after signal processing, performs image processing on the fire control windowing, performs target identification on the motion characteristics and spectral characteristics of a target, and sends the processed data to the display control unit for processing; the display control unit is used for man-machine interaction, displaying radar echoes, sending a processing command and generating a flexible target track file; and the external interface unit is used for outputting radar video data to other equipment.
2. The three-coordinate radar array element-level flexible track target simulator of claim 1, wherein: the signal generation unit is used for superposing array element level echo signal data of various real targets, clutter and interference which are collected and processed in advance on radar array element level echo signals generated in a simulation mode, and predicting RCS and motion states of the targets, the clutter and the interference to simulate the intensity and fluctuation of the echo signals.
3. The three-coordinate radar array element-level flexible track target simulator of claim 1, wherein: and the signal processing unit is used for carrying out corresponding signal processing on the radar echo signal according to the selected analog radar model and the control command.
4. The three-coordinate radar array element-level flexible track target simulator of claim 1, wherein: the display control unit selects multiple types of radars to simulate, parameters of various types of radars are written in a program in advance or are obtained by reading files, and parameters can be set on a display control interface according to requirements to perform custom simulation; simulating various targets, and acquiring real echo data of the targets by reading a file; and simulating the motion tracks of various targets, and reading track files or moving according to the motion tracks of the mouse of an operator.
5. The three-coordinate radar array element-level flexible track target simulator of claim 1, wherein: and the data processing unit processes the data after signal processing to generate a target point flight path, performs high-resolution imaging on the fire control windowing data, and identifies according to the target micro Doppler characteristics.
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Cited By (2)
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| CN116148788A (en) * | 2023-04-20 | 2023-05-23 | 成都富元辰科技有限公司 | Radar signal simulation method, device, equipment and storage medium |
| CN116755049A (en) * | 2023-08-16 | 2023-09-15 | 江西联创精密机电有限公司 | Radar target simulation training method, system, equipment and storage medium |
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