CN115166659A - A three-coordinate radar array element-level flexible trajectory target simulator - Google Patents

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

A three-coordinate radar array element-level flexible trajectory target simulator

technical field

The invention relates to the technical field of radar simulator simulation.

Background technique

Radar simulator is indispensable in the process of radar development and joint debugging and testing with surrounding electronic equipment. The previous radar simulator has a single function and can only simulate one radar signal. The use is very limited, and the simulated target style Single, the target running route is simple, and the target authenticity is not high.

The invention comprehensively considers the advantages and disadvantages of the previous radar simulator design, analyzes the requirements of the joint debugging and joint testing of the radar and related electronic equipment, and also considers the ease of use and maintenance of the product, and designs the radar based on this. The simulator greatly simplifies the difficulty of joint debugging, training, and training of radar and related electronic equipment, improves work efficiency, and saves manpower and material resources.

SUMMARY OF THE INVENTION

The invention provides a three-coordinate radar array element-level flexible trajectory target simulator. The operator can choose various types of radar simulations, and can also set parameters according to requirements to customize the simulation, and can use real target radar echoes and clutter noises. Interference and other data simulate air-sea targets, gun-fired water columns, low-altitude helicopters, drone swarms and other targets, and simulate various target running trajectories to solve the debugging, training, use and training of multi-type radar and other equipment that requires radar data, etc. need.

The invention proposes a target simulator with a three-coordinate radar array element-level flexible trajectory, and the technical scheme includes:

It includes a hardware part and a software part; the hardware part includes a cabinet, and the cabinet is equipped with a display screen, a switch, a switch, a display and control computer, and a radar signal generation and processing computer; the display and control computer is used for radar interface display and control; the The radar signal generation and processing computer is used to generate and process radar echo signals. It is equipped with Pcie board and external interface board, and has the functions of inputting optical fiber data, outputting optical fiber, digital differential signal, and analog signal; the software part includes signal generation. unit, signal processing unit, data processing unit, display control unit, and external interface unit; the signal generation unit simulates and generates radar array element-level echo signals, and generates radar echoes according to different types of radar parameters and real radar echo signal models The signal data and the echo characteristics of different targets, clutter and interference simulate the target echo signal, and then the radar signal processing unit performs radar signal processing on the simulated radar echo; the data processing unit performs data processing on the data after the signal processing. At the same time, image processing is performed on the fire control window, and the motion characteristics and spectral characteristics of the target are identified, and the processed data is sent to the display and control unit for processing; the display and control unit is used for human-computer interaction and displays radar echoes , send a processing command to generate a flexible target trajectory file; the external interface unit is used to output radar video data to other devices.

Further, the signal generating unit simulates and generates echo signals of various types of radars, superimposes the array element-level echo data of various types of real targets, clutter, and interference collected and processed in advance, and estimates the target, clutter, and interference. Wave, interference RCS and motion state, to simulate the intensity and fluctuation of the echo signal; the signal processing unit, according to the selected simulated radar model and the control command to perform corresponding signal processing on the radar echo signal; the display and control unit, Select multiple types of radars for simulation, the parameters of each type of radar are written in the program in advance or obtained by reading files, and parameters can also be set on the display and control interface according to requirements to customize the simulation; simulate multiple types of targets, and the real echo data of the target Obtained by reading a file; simulating a variety of target motion trajectories, reading the trajectory file or moving according to the operator's mouse running trajectory; the data processing unit processes the data after signal processing, generates target point trajectory, and opens fire control High-resolution imaging is performed on the window data, and identification is made according to the micro-Doppler characteristics of the target.

The beneficial effects of the present invention are:

The present invention can use one radar simulator to simulate various types of radars, and can also simulate radars with customized parameters; use real echo data to simulate the array element-level radar echo signals of various different targets, and simulate the fidelity and richness. High; it can simulate the flexible trajectory of the target, meet a variety of use requirements, simplify the joint debugging, training, and training difficulty of radar and related electronic equipment, improve work efficiency, and save manpower and material resources. Great savings in manpower and material resources, with a certain economic efficiency.

Description of drawings

Figure 1 shows the working principle of the radar simulator.

Figure 2 is a schematic diagram of the radar simulator hardware.

Figure 3. Signal generation analog target logic diagram.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

The present invention proposes a three-coordinate radar array element-level flexible trajectory target simulator, and the preferred embodiment is as follows:

The working principle of the simulator is shown in Figure 1. The target simulation process is initiated by the display and control unit. The operator can select the radar model, working mode, and target state (such as stationary point target, moving point target) to be simulated on the display and control interface. , target type (such as ship, helicopter, civil airliner, fighter jet, rotary-wing drone), target motion line (such as radial flight, tangential flight, flight by mouse line) option, display and control software to store or read files in advance Obtain radar parameters, target state parameters, target real echo data, target running line data, display and control software according to radar antenna beam scanning characteristics and target motion trajectory, each antenna rotation cycle, calculate once the reference information and copy target information, through The motion characteristics of the target calculate the azimuth of the reference target in the next antenna rotation cycle, and before the arrival of the reference target azimuth, calculate the azimuth, distance, elevation angle, Doppler, amplitude and other information of the reference target in the next antenna rotation cycle, and in the Before updating the message azimuth of the signal generating unit, the radar model, target real echo data, reference target parameter information, duplicate target information, etc. are sent to the signal generating unit through a message.

The signal generation unit is used to generate the radar scanning azimuth, and generate the radar echo simulation array element-level signal corresponding to the number of channels according to the display control command. The radar echo data of the simulated target can be the real target radar echo of the corresponding radar model collected in advance. The array element level signal can also be a pure analog radar echo array element level signal. The signal generation software loaded in the FPGA on the Pcie board generates azimuth information corresponding to the rotation period of the antenna according to the radar model, working mode and other parameters. After initialization, according to the rotational speed control code, the simulated azimuth matching the working mode is generated, and the cycle counter is generated according to the current repetition cycle. The program updates the target parameters according to the target type, generates the reference target, calculates the duplicate target information on the distance and azimuth, and generates the duplicate target. The target generation logic is shown in Figure 3. When the target command is received, it is judged whether to update the target parameters of each circle. When the current orientation is equal to the updated orientation, the target parameters of the current circle are updated. Otherwise, the parameters are kept until the next circle to update the orientation. . When the current pulse ends, update the parameters of the next pulse; otherwise, wait for the end of the pulse. Judging whether the target on the azimuth has been generated, when the azimuth target counter is equal to the number of azimuth targets, when it is judged that the current azimuth is equal to the next target azimuth, calculate the parameters of the next azimuth target; when it is judged that the current azimuth is greater than the next target azimuth, judge the distance Whether the generated target is completed, when the distance target counter is equal to the distance target number, when it is judged that the current distance is equal to the next target distance, the parameter information of the next distance target is calculated; when it is judged that the current distance is greater than the next target distance, the target data is generated, The generated target data is weighted by the amplitude coefficient; when the distance target counter is greater than the distance target number, the current pulse distance target generation ends; when the azimuth target counter is greater than the azimuth target number, the azimuth target generation is stopped.

The signal processing unit completes the reception, analysis and processing of the display and control commands, and performs DBF, pulse compression, constant false alarm, MTI and other signal processing on the analog radar array element-level radar echo signals generated by the signal generation unit according to the commands and parameters sent by the display control. operation, the obtained analog radar video data is sent to the display control unit and the data processing unit.

The data processing unit receives commands and target information sent by the display and control unit through the network for data processing, such as user admission, tracking, windowing, identification, etc., and generates point track information, target recognition results and windowing image data, and sends them to the display and control unit through the network. unit.

The external interface unit receives the analog radar video data and radar scanning azimuth data sent by the signal processing unit, generates the required elevation video data and azimuth increment and other information, and outputs it to other devices in the system through optical fibers, differential lines, and radio frequency lines.

The flexible trajectory generates trajectory files according to the flight trajectory, speed, and radar reflection area of common aircraft, and stores them in the computer. When necessary, the trajectory parameters are obtained by reading the files, and the flexible trajectory of the simulated target is generated. The flexible trajectory can also be generated according to the user's mouse on the display control interface, and the simulated target will run according to the line 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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