CN113176545A - Gun position reconnaissance and calibration radar training simulation system and method - Google Patents
Gun position reconnaissance and calibration radar training simulation system and method Download PDFInfo
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- CN113176545A CN113176545A CN202110718849.2A CN202110718849A CN113176545A CN 113176545 A CN113176545 A CN 113176545A CN 202110718849 A CN202110718849 A CN 202110718849A CN 113176545 A CN113176545 A CN 113176545A
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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 relates to a training simulation system and a method for a radar for gun position reconnaissance and calibration, wherein the system comprises a broadband radio frequency module, a signal processor module, a control module and a receiving and transmitting antenna module; the broadband radio frequency module is used for receiving radio frequency signals sent by the receiving and sending antenna module during receiving to form an intermediate frequency signal sending signal processor module; during transmission, the intermediate frequency interference signal from the signal processor module is subjected to up-conversion, filtering and amplification and then is sent to the receiving and transmitting antenna module; the signal processor module is used for detecting the intermediate frequency signal, measuring parameters of the signal, extracting a sample, performing time sequence control and interference modulation on the signal, and sending an interference signal generated by simulation and an echo simulation signal to the control module and the broadband radio frequency module; the control module is used for carrying out data processing on the interference signal and the echo simulation signal sent by the signal processor module. The method and the device can directly simulate the change of parameters such as the target of the projectile, the RCS of the effective reflecting surface of the target and the like, and simulate the motion track of the projectile.
Description
Technical Field
The invention belongs to the technical field of microwave radio frequency, and particularly relates to a training simulation system for a radar for gun position reconnaissance and calibration.
Background
The gun position reconnaissance radar is important electronic equipment in a battlefield. The method has the functions of determining the accurate parameters of the gun position of the shooting party and providing basis for the counterattack of artillery by detecting the parameters such as RCS (radar cross section), Doppler frequency and the like of the effective reflection surface of the echo of the shot of the shooting party with more than 2 points and calculating the speed and the motion trail of the echo.
Under the condition of non-live-ammunition shooting, as the target environment cannot meet the tactical use requirement of the gun position reconnaissance and correction radar, no matter how to check the radar searching, verifying and tracking performances, judge the radar working state and implement the radar reconnaissance and correction operation training in the production debugging stage or the combat training process, the method is always a difficult problem in the development and use of the gun position reconnaissance and correction radar of various countries in the world. The development and development of an air feed target generation system, namely a training simulator of the artillery reconnaissance and calibration radar, which can comprehensively test and verify the performance of the gun position reconnaissance and calibration radar, judge whether the radar fails or not and simplify the radar training mode are important ways for solving the problems.
Disclosure of Invention
In order to solve the technical problems, the invention provides a training simulation system for a gun position reconnaissance and calibration radar, which can directly simulate the change of parameters such as the angle, the distance, the speed and the RCS (radar cross section) of an effective target reflecting surface of a projectile target, simulate the motion trail of the projectile and provide conditions for the performance detection and training of the gun position reconnaissance and calibration radar.
The invention relates to a training simulation system for a gun position reconnaissance and calibration radar, which comprises a broadband radio frequency module, a signal processor module, a control module and a receiving and transmitting antenna module; wherein the content of the first and second substances,
the broadband radio frequency module is used for receiving radio frequency signals sent by the transceiving antenna module during receiving, and performing filtering amplification and down-conversion on the radio frequency signals to form intermediate frequency signals which are sent to the signal processor module; during transmission, the intermediate frequency interference signal from the signal processor module is subjected to up-conversion, filtering and amplification and then is sent to the receiving and transmitting antenna module; meanwhile, providing a dot frequency source signal for the system;
the signal processor module is used for detecting the intermediate frequency signal, performing parameter measurement on the detected signal, extracting a signal sample, performing time sequence control and interference modulation on the signal, simulating to generate an interference signal and sending the echo simulation signal to the control module and the broadband radio frequency module;
the control module is used for carrying out data processing on the interference signal and the echo simulation signal sent by the signal processor module, and has the functions of system control, comprehensive display and human-computer interaction.
Furthermore, the receiving and transmitting antenna module comprises a front end unit, a power amplification unit and a receiving and transmitting antenna device, wherein radio frequency signals input by the receiving antenna device realize amplitude limiting, amplification, frequency mixing, filtering and AGC control through the front end unit, and the converted signals are sent to a receiving channel; the power amplification unit amplifies the power of the output signal, and the output signal is sent to the transmitting antenna device after reaching the transmitting power required by the system.
Further, the broadband radio frequency module comprises a downlink receiving channel, and the downlink receiving channel outputs the radio frequency signal input by the receiving front-end unit to the signal processor module after performing two-stage filtering amplification on the radio frequency signal;
the uplink transmission channel is used for carrying out frequency conversion amplification on the uplink interference signal output by the signal processor module and then outputting the uplink interference signal to the power amplification unit;
the frequency synthesizer is used for generating coherent local oscillator signals required by frequency mixing of the downlink receiving channel and the signal processing module, and simultaneously providing clock signals required by A/D and D/A for the whole system.
Furthermore, the signal processor module comprises a signal processing board consisting of an FPGA chip and a DSP processor, controls all switches and local oscillators of an uplink receiving channel and a downlink receiving channel, analyzes time domain and frequency domain parameters of a received signal, and simulates a radar echo signal and an interference signal; and the radar echo signal and the interference signal are directly simulated and generated according to the received instruction.
As a preferred embodiment of the present application, the transceiver antenna module is a small linear array radiating antenna unit.
As a preferred embodiment of the present application, the control module comprises a data processing unit, and the data processing unit implements system-wide working mode control, data processing, system state management and communication with the display control terminal by a central control single board computer containing a POWER PC chip;
the wireless unit is used for completing the wireless communication functions of the data processing unit and the display control terminal;
the system also comprises a display and control terminal, wherein the display and control terminal is used for realizing human-computer interface interaction.
The application also provides a training simulation method for the gun position reconnaissance and calibration radar, which comprises the following steps:
step one, a receiving antenna receives a radio frequency signal and sends the radio frequency signal to a broadband radio frequency module;
step two, the broadband radio frequency module carries out filtering amplification and down-conversion on the radio frequency signal to form an intermediate frequency signal and sends the intermediate frequency signal to the signal processor module;
step three, the signal processor module detects the intermediate frequency signal, measures parameters, extracts samples, controls time sequence and modulates interference, simulates and generates a radar echo signal and an interference signal, and sends the radar echo signal and the interference signal to the control module and the broadband radio frequency module;
fourthly, the broadband radio frequency module carries out up-conversion and filtering amplification on the radar echo signals and the interference signals from the signal processor module and then sends the radar echo signals and the interference signals to a transmitting antenna;
and fifthly, the control module performs trace point calculation, speed and track simulation description data processing on the radar signal parameters sent by the signal processor module.
Further, the generation of the target real track is described by using a 6-degree-of-freedom rigid body trajectory model in the outer ballistic theory, and the trajectory differential equation set is as follows:
the system of ballistic differential equations satisfies the following relationship:
in the formula
、
、
The velocity component of the target velocity in the detection rectangular coordinate system is taken as the velocity component;
、
、
is the local wind speed component;
、
、
aerodynamic drag, lift and magnus forces;
is the target mass;
is the target relative velocity;
is a pitch angle;
is a yaw angle;
and
respectively by angle of attack
Induced static and martensitic moments;
is the roll angular velocity;
is the included angle between the x-axis of the ballistic coordinate system and the x-axis of the velocity coordinate system;
representing the included angle between the x axis of the speed coordinate system and the bullet axis;
the included angle between the projection vector of the x axis of the elastic axis coordinate system in the plane of the speed coordinate system xoz and the x axis;
and
respectively representing an equatorial damping moment and a polar damping moment; a and C represent the equatorial moment of inertia and the polar moment of inertia, respectively;
the tail wing guide torque;
the rotation angle of the elastic axis coordinate system and the relative speed coordinate system is obtained;
is the rotation angle of the second elastic axis coordinate system; wherein the subscriptTRepresenting the target.
Furthermore, the method uses the received radar signals for storage and transformation, and extracts radiation again for receiving the radar signals under the action of the simulated ballistic signals to form echo data of the simulated projectile.
Has the advantages that:
the gun position reconnaissance and correction radar training simulation system and the gun position reconnaissance and correction radar training simulation method are designed according to the technical requirements of gun position reconnaissance and correction radar training; generating ballistic target data by using a typical ballistic model, and generating a target echo signal in a response mode to realize simulation of angle change, distance change, speed and RCS change of a projectile target; the echo signal of the ballistic target transmitted by the system has similarity and deception with the transmitted signal of the radar, so that the target signal of the projectile has real-time property and authenticity, the angle change of the target of the projectile is realized by controlling the small linear array radiation unit, and the real motion track of the ballistic target is simulated. And finally, various conventional cannon trajectory echo signals such as 82mm mortars, 122mm howitzer shells, 122mm rocket cannons, 130 cannons, 152 cannons and the like can be simulated and realized.
The gun position reconnaissance and correction radar training simulator aims at constructing a real battlefield electromagnetic environment, and can participate in the multiple weapons synthesis real soldier exercise drilling under the field environment condition, verify the equipment performance and the operation application method and collect battlefield electromagnetic environment data by constructing semi-physical radar reconnaissance, target echo simulation and simulation radar software and hardware platforms; the daily scientific research training system can be set up, electromagnetic environment data of various radar equipment under various interference conditions and target echo characteristics can be simulated by taking collected exercise drilling site electromagnetic environment data as basic input through a simulation means, an operation platform is provided for battlefield frequency spectrum management and equipment combat application research, and conditions are provided for development and production of other electronic equipment.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1 is a schematic block diagram of a training simulation system for a gun position reconnaissance and calibration radar according to the present application;
FIG. 2 is a schematic block diagram of a radio frequency transmit receive channel;
FIG. 3 is a schematic block diagram of a frequency source;
fig. 4 is a diagram of a system control architecture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment is a training simulation system for a gun position reconnaissance and calibration radar, which comprises a broadband radio frequency module, a signal processor module, a control module and a receiving and transmitting antenna module; wherein the content of the first and second substances,
the broadband radio frequency module is used for receiving radio frequency signals sent by the transceiving antenna module during receiving, and performing filtering amplification and down-conversion on the radio frequency signals to form intermediate frequency signals which are sent to the signal processor module; during transmission, the intermediate frequency interference signal from the signal processor module is subjected to up-conversion, filtering and amplification and then is sent to the receiving and transmitting antenna module; meanwhile, providing a dot frequency source signal for the system;
the signal processor module is used for detecting the intermediate frequency signal, performing parameter measurement on the detected signal, extracting a signal sample, performing time sequence control and interference modulation on the signal, simulating to generate an interference signal and sending the echo simulation signal to the control module and the broadband radio frequency module;
the control module is used for carrying out data processing on the interference signal and the echo simulation signal sent by the signal processor module, and has the functions of system control, comprehensive display and human-computer interaction.
A training simulation system for a gun position reconnaissance and correction radar can directly simulate the change of parameters such as the angle, the distance, the speed and the RCS (radar cross section) of a target of a projectile, simulate the motion trail of the projectile, provide conditions for performance detection and training of the gun position reconnaissance and correction radar, and can also be used for battlefield confrontation, carry out interference and deception on the gun position reconnaissance radar of an enemy party and shield the tactical intention of the enemy party.
2. Composition and function of each part
The gun position reconnaissance and calibration radar training simulation system is essentially a flight projectile simulation signal source and mainly comprises a ballistic trajectory response signal source extension, an outfield target angle motion generation extension, a control extension, system software and the like.
The hardware of the training simulation system for the gun position reconnaissance and calibration radar mainly comprises an antenna frame, an IO acquisition board, a control module, a frequency synthesizer and other subsystem circuits, and is mainly used for simulating shot target echo signals of various types, different speeds and incoming directions and adapting to various gun position reconnaissance and calibration radars; the signal source is realized by adopting an advanced microwave synthesis technology and a relatively mature direct digital frequency synthesis (DDS) technology, and has strong feasibility; the signal source covers S, X, Ku three main frequency bands, and covers the working frequency band range of the typical gun position reconnaissance and calibration radar.
The gun position reconnaissance and calibration radar training simulation system mainly comprises an array antenna, a target simulation host, an amplification module, a triangular support, a storage box and the like. The working principle block diagram of the gun position reconnaissance and calibration radar training simulator is shown in fig. 1, and when the gun position reconnaissance and calibration radar training simulator works, the array antenna is hung on a three-leg frame rod and is connected to a host through a cable. The remote control software runs on a gun position reconnaissance and correction radar training simulator control terminal (or an independent computer) and is communicated with the host through an RS485 interface, a human-computer interface for operating the radio frequency echo simulator is provided when the remote control software runs, an operator can set working parameters such as working frequency and working mode of the radio frequency echo simulator through a keyboard and a mouse, a group of trajectory echo data to be simulated is generated by calling trajectory echo data generation software, the remote control software sends the parameters and the data to the host through a wired communication cable, the host carries out corresponding signal processing on received radar signals according to the parameters and the data to form simulated echo signals and sends the simulated echo signals out, and the radar can analyze the trajectory information after receiving the echo signals to complete the function of simulated training.
The gun position reconnaissance and calibration radar training simulation system is realized based on the technologies of broadband radio frequency transceiving, broadband digital receiver, digital radio frequency storage (DRFM), full digital interference source and the like, mainly comprises equipment such as a broadband transceiving antenna, a broadband radio frequency module, a signal processing unit, a control terminal and the like, and is shown in a schematic block diagram of fig. 1
The receiving and transmitting antenna adopts a broadband area array antenna, the frequency covers 2-18GHz, and the receiving and transmitting functions of radio frequency signals are mainly completed.
The broadband radio frequency module comprises a solid power amplifier, a down-conversion channel and an up-conversion channel, and is mainly used for finishing filtering amplification and down-conversion of radio frequency signals during receiving to form intermediate frequency signals and sending the intermediate frequency signals to the signal processing unit; during transmission, the intermediate frequency interference signal from the signal processing unit is subjected to up-conversion, filtering and amplification and then sent to the transmitter unit; meanwhile, point frequency source signals such as a reference clock, a sampling clock and the like are provided for the system.
The signal processing unit integrates a high-speed ADC, a high-speed DAC, a large-scale FPGA and the like, and mainly completes the functions of signal detection, parameter measurement, sample extraction, time sequence control, interference modulation, a communication interface and the like.
The terminal control adopts a portable computer and mainly completes the functions of data processing, system control, comprehensive display, man-machine interaction and the like.
The equipment mainly comprises the following modules:
1) the receiving and transmitting front end module comprises a front end module and a power amplification part, realizes the amplitude limiting, the amplification, the frequency mixing, the filtering and the AGC control of the radio frequency signal output by the receiving antenna, sends the processed signal to a receiver, and the power amplifier amplifies the power of the output signal to send the signal to the transmitting antenna after the transmitting power required by the system is reached.
2) Receiver frequency conversion module: the downlink receiving channel performs two-stage filtering amplification on the radio-frequency signal input by the receiving front end and outputs the radio-frequency signal to the signal processor; the uplink receiving channel outputs the interference uplink signal input by the signal processor to the transmitter after frequency conversion and amplification; the frequency synthesizer generates a dot frequency local oscillator required by the frequency mixing of the receiving subsystem and the interference intermediate frequency module, and simultaneously provides clock signals required by AD and DA for the signal processing subsystem.
3) A signal processor unit: the method comprises the steps that 1 signal processing board mainly composed of an FPGA and a DSP is used for controlling all switches and local oscillators of an uplink channel and a downlink channel, time domain and frequency domain parameter measurement is carried out on received signals, simulation of radar echo signals and interference signals is simultaneously completed, and in addition, the interference signals/echo simulation signals can be directly simulated and generated according to commands received by display and control terminal software.
4) A data processing module: a central control single board computer containing a POWERPC chip is used for completing the functions of work mode control, data processing, system state management, communication with a display control terminal and the like of the whole system.
5) A wireless module: and the wireless passing function of the data processing module and the display control terminal is completed, and the data processing module and the display control terminal can be connected to the network port of the computer.
6) Displaying and controlling the terminal: the system consists of a general computer and display control software, and is communicated with a single board computer through a network cable (or a wireless module) to mainly complete the human-computer interface interaction function.
The broadband microwave receiving and dispatching channel, namely the TR component comprises a broadband radio frequency channel, a local oscillator power divider, a self-checking signal power divider and a peripheral power supply control circuit, a schematic diagram is shown in figure 2, and the working frequency range is required to be 2-18GHz, so that the high and medium frequency of 1.8GHz is realized by adopting a secondary frequency conversion mode, and harmonic wave influence caused by frequency conversion is effectively avoided.
The receiving and transmitting channels are controlled and switched through the single-pole double-throw switch, and the receiving channel comprises a limiting amplifier, a switch filter component, a frequency mixer, a filter, a DDS local vibration source and the like; the transmitting channel consists of a broadband microwave amplifier, a switch filter component, a frequency mixer, a filter, a DDS local vibration source and the like.
Because the radar transmitting power exceeds KW level, the anti-interference capability of a receiving channel needs amplitude limiting. The input end of the component is sequentially provided with an amplitude limiter, a self-checking switch, a dynamic switch and an LNA. In order to meet the requirement of the anti-burning power of the component, the electrical performance parameters of the amplitude limiter selected by the component are shown in the figure, and the figure shows that the component can meet the index requirement of the anti-burning power of 5W.
The radar interference simulator works in an ultra-wideband microwave bandwidth, so the input-output standing wave design is very important. Return loss of the input port of the component is mainly determined by the self-checking switch, the dynamic switch, the amplitude limiter and the cascade connection of standing waves of all stages of the power amplifier and the LNA. The standing-wave ratio graphs of the input ports of the components are respectively shown in the figure. The component can meet the requirement that the transmission voltage standing wave ratio is less than or equal to 3 according to the curve.
The design of the components ensures good matching of the link, and the equalizer and the attenuator are used for regulating and controlling the gain and improving the link matching. And the index requirement that the flatness of the receiving gain of the component is less than or equal to 2dB/GHz can be met through certain debugging at the later stage.
A broadband high agile frequency source.
The frequency source is a core component of the device. The composition of the single-path output frequency source is shown in fig. 3, and the frequency hopping speed and the ultra-wideband design are mainly improved in the following ways:
1) frequency doubling mode: the DDS ultra-wideband design is completed in a frequency doubling mode, and the broadband frequency hopping speed is improved
2) Parallel radar: when the DDS frequency control code is transmitted, a parallel radar is used, and the data transmission speed is improved.
3) And (3) device redundancy selection: the highest data transmission speed of the FPGA is 20ns, the frequency conversion speed of the AD9910 device is 4ns, the radio frequency transformer, the frequency multiplier and the amplifier belong to delay-free devices, the analysis frequency conversion speed should be 20ns theoretically, and the device is designed in a redundant mode.
Two DDS frequency agile signal sources are adopted as local oscillators, and the technical indexes of the ultra wide band high speed frequency agile modulation signal source are as follows:
ultra wide band: 4 to 22GHz/20.2 to 23.2GHz
High-speed agility: 1us
Ultra-small volume of 130 mm 110mm 20 mm
Multiple modulation modes: agile, pulse, digital frequency modulation
Can be used in the fields of ballistic defense, agile radar, electronic countermeasure, frequency hopping radar, electronic reconnaissance and the like.
Frequency source principle as shown in fig. 3, the parameters of the frequency source are configured as follows:
frequency range: 4 to 22GHz/20.2 to 23.2GHz
Frequency stepping: 10MHz @ ≧ 100MHz
0.1MHz@≤100MHz
Output power: not less than +5dBm
Output power flatness: +/-2 dBm
Phase noise: -90dBc/Hz @1 KHz-95 dBc/Hz @100KHz
Stray suppression: less than or equal to-60 dBc
Harmonic suppression: ≦ -20 dBc (TYP)
Frequency switching time: less than or equal to 500ns (frequency precision 10MHz)
Less than or equal to 1 mu s (frequency precision 500KHz)
Pulse modulation:
pulse modulation depth: -60dB
Digital frequency modulation: (optional)
Wide radio frequency band: fout 6
The FPGA adopts a 400MHz broadband digital frequency storage transceiving board, mainly completes the functions of receiving 1 path of broadband intermediate frequency signals and generating 1 path of broadband waveform signals, and the board has the size of 3U; high-performance ADC, DAC and high-capacity FPGA are integrated, and various communication interfaces are provided, so that the high-performance digital transceiving development requirement can be met.
Receiving a link, and completing 1-path broadband intermediate-frequency signal acquisition, digital down-conversion and filtering extraction to form a baseband signal; a transmitting link for completing the generation of 1 path of broadband intermediate frequency signals (directly generating digital intermediate frequency or baseband signal interpolation); receiving, transmitting, controlling and the like corresponding FPGA processing; the external interface comprises optical fibers (10Gbps), TTL, RS422, RS232 and gigabit network/hundred mega network;
main technical indexes
Receiving indexes:
inputting an intermediate frequency: 1800MHz
Inputting intermediate frequency power: > 10dbm
Input intermediate frequency signal bandwidth: > 400MHz
ADC bit number: 12 bit
Secondly, transmitting indexes:
outputting an intermediate frequency: 1800MHz
Outputting intermediate frequency power: 15dbm >
Input intermediate frequency signal bandwidth: > 400MHz
DAC bit number: 14
3. Software control part
The main human-computer interaction interface has concise and clear design of various parameter inputs, and the software design must have the following functions:
1) radar target simulation and interference signal scene editing and setting function
2) Fault diagnosis function
3) Power-on self-checking function
4) Control protection and alarm functions
5) Spectrum storage, playback and analysis functions
Fig. 4 is a system control architecture diagram, which is designed by selecting 5C 8051F310 industrial-grade microprocessor devices, and each unit is controlled by an independent microprocessor as shown in the above figure.
The central processor and the whole machine system adopt an RS485 serial port protocol to complete power-on self-test (PUBIT), command self-test (MBIT) and automatic fault alarm.
Example 2
The application also provides a training simulation method for the gun position reconnaissance and calibration radar, which comprises the following steps:
step one, a receiving antenna receives a radio frequency signal and sends the radio frequency signal to a broadband radio frequency module;
step two, the broadband radio frequency module carries out filtering amplification and down-conversion on the radio frequency signal to form an intermediate frequency signal and sends the intermediate frequency signal to the signal processor module;
step three, the signal processor module detects the intermediate frequency signal, measures parameters, extracts samples, controls time sequence and modulates interference, simulates and generates a radar echo signal and an interference signal, and sends the radar echo signal and the interference signal to the control module and the broadband radio frequency module;
fourthly, the broadband radio frequency module carries out up-conversion and filtering amplification on the radar echo signals and the interference signals from the signal processor module and then sends the radar echo signals and the interference signals to a transmitting antenna;
and fifthly, the control module performs trace point calculation, speed and track simulation description data processing on the radar signal parameters sent by the signal processor module.
Further, the generation of the target real track is described by using a 6-degree-of-freedom rigid body trajectory model in the outer ballistic theory, and the trajectory differential equation set is as follows:
the system of ballistic differential equations satisfies the following relationship:
in the formula
、
、
The velocity component of the target velocity in the detection rectangular coordinate system is taken as the velocity component;
、
、
is the local wind speed component;
、
、
aerodynamic drag, lift and magnus forces;
is the target mass;
is the target relative velocity;
is a pitch angle;
is a yaw angle;
and
respectively by angle of attack
Induced static and martensitic moments;
is the roll angular velocity;
is the included angle between the x-axis of the ballistic coordinate system and the x-axis of the velocity coordinate system;
representing the included angle between the x axis of the speed coordinate system and the bullet axis;
the included angle between the projection vector of the x axis of the elastic axis coordinate system in the plane of the speed coordinate system xoz and the x axis;
and
respectively representing an equatorial damping moment and a polar damping moment; a and C represent the equatorial moment of inertia and the polar moment of inertia, respectively;
the tail wing guide torque;
the rotation angle of the elastic axis coordinate system and the relative speed coordinate system is obtained;
is the rotation angle of the second elastic axis coordinate system; wherein the subscriptTRepresenting the target.
Furthermore, the method uses the received radar signals for storage and transformation, and extracts radiation again for receiving the radar signals under the action of the simulated ballistic signals to form echo data of the simulated projectile.
The gun position reconnaissance and correction radar training simulation method takes the construction of a real battlefield electromagnetic environment as a target, and can participate in the multiple weapons synthesis real soldier exercise drilling under the field environment condition, verify the equipment performance and the operation application method and collect battlefield electromagnetic environment data by constructing a semi-physical radar reconnaissance, target echo simulation and simulation radar software and hardware platform; the daily scientific research training system can be set up, electromagnetic environment data of various radar equipment under various interference conditions and target echo characteristics can be simulated by taking collected exercise drilling site electromagnetic environment data as basic input through a simulation means, an operation platform is provided for battlefield frequency spectrum management and equipment combat application research, and conditions are provided for development and production of other electronic equipment.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A training simulation system for a gun position reconnaissance and calibration radar is characterized by comprising a broadband radio frequency module, a signal processor module, a control module and a transmitting and receiving antenna module; wherein the content of the first and second substances,
the broadband radio frequency module is used for receiving radio frequency signals sent by the transceiving antenna module during receiving, and performing filtering amplification and down-conversion on the radio frequency signals to form intermediate frequency signals which are sent to the signal processor module; during transmission, the intermediate frequency interference signal from the signal processor module is subjected to up-conversion, filtering and amplification and then is sent to the receiving and transmitting antenna module; meanwhile, providing a dot frequency source signal for the system;
the signal processor module is used for detecting the intermediate frequency signal, performing parameter measurement on the detected signal, extracting a signal sample, performing time sequence control and interference modulation on the signal, simulating to generate an interference signal and sending the echo simulation signal to the control module and the broadband radio frequency module;
the control module is used for carrying out data processing on the interference signal and the echo simulation signal sent by the signal processor module, and has the functions of system control, comprehensive display and human-computer interaction.
2. The system of claim 1, wherein the transceiver antenna module comprises a front-end unit, a power amplification unit, and a transceiver antenna device, and the front-end unit performs amplitude limiting, amplification, frequency mixing, filtering, and AGC control on the rf signal input by the transceiver antenna device, and sends the converted signal to the receiving channel; the power amplification unit amplifies the power of the output signal, and the output signal is sent to the transmitting antenna device after reaching the transmitting power required by the system.
3. The training simulation system of a gun position reconnaissance and calibration radar as claimed in claim 1, wherein the broadband radio frequency module comprises a downlink receiving channel, and the downlink receiving channel performs two-stage filtering and amplification on a radio frequency signal input by the receiving front-end unit and outputs the radio frequency signal to the signal processor module;
the uplink transmission channel is used for carrying out frequency conversion amplification on the uplink interference signal output by the signal processor module and then outputting the uplink interference signal to the power amplification unit;
the frequency synthesizer is used for generating coherent local oscillator signals required by frequency mixing of the downlink receiving channel and the signal processing module, and simultaneously providing clock signals required by A/D and D/A for the whole system.
4. The system of claim 1, wherein the signal processor module comprises a signal processing board comprising an FPGA chip and a DSP processor, and is configured to control all switches and local oscillators of uplink and downlink receiving channels, analyze time domain and frequency domain parameters of the received signals, and simulate radar echo signals and interference signals; and the radar echo signal and the interference signal are directly simulated and generated according to the received instruction.
5. The system for simulating gun position reconnaissance and calibration radar training as claimed in any one of claims 1 to 4, wherein the transceiver antenna module is a small linear array radiating antenna unit.
6. The gun position reconnaissance and calibration radar training simulation system of claim 5, wherein the control module comprises a data processing unit, and the data processing unit is used for realizing system-wide work mode control, data processing, system state management and communication with a display and control terminal by a central control single board computer containing a POWERPC chip;
the wireless unit is used for completing the wireless communication functions of the data processing unit and the display control terminal;
the system also comprises a display and control terminal, wherein the display and control terminal is used for realizing human-computer interface interaction.
7. A training simulation method for a gun position reconnaissance and calibration radar is characterized by comprising the following steps:
step one, a receiving antenna receives a radio frequency signal and sends the radio frequency signal to a broadband radio frequency module;
step two, the broadband radio frequency module carries out filtering amplification and down-conversion on the radio frequency signal to form an intermediate frequency signal and sends the intermediate frequency signal to the signal processor module;
step three, the signal processor module detects the intermediate frequency signal, measures parameters, extracts samples, controls time sequence and modulates interference, simulates and generates a radar echo signal and an interference signal, and sends the radar echo signal and the interference signal to the control module and the broadband radio frequency module;
fourthly, the broadband radio frequency module carries out up-conversion and filtering amplification on the radar echo signals and the interference signals from the signal processor module and then sends the radar echo signals and the interference signals to a transmitting antenna;
and fifthly, the control module performs trace point calculation, speed and track simulation description data processing on the radar signal parameters sent by the signal processor module.
8. The method of claim 7, wherein the target true trajectory generation is described by a 6-degree-of-freedom rigid body trajectory model in epidocology, and the trajectory differential equations are as follows:
the system of ballistic differential equations satisfies the following relationship:
in the formula
、
、
The velocity component of the target velocity in the detection rectangular coordinate system is taken as the velocity component;
、
、
is the local wind speed component;
、
、
aerodynamic drag, lift and magnus forces;
is the target mass;
is the target relative velocity;
is a pitch angle;
is a yaw angle;
and
respectively by angle of attack
Induced static and martensitic moments;
is the roll angular velocity;
is the included angle between the x-axis of the ballistic coordinate system and the x-axis of the velocity coordinate system;
representing the included angle between the x axis of the speed coordinate system and the bullet axis;
the included angle between the projection vector of the x axis of the elastic axis coordinate system in the plane of the speed coordinate system xoz and the x axis;
and
respectively representing an equatorial damping moment and a polar damping moment; a and C represent the equatorial moment of inertia and the polar moment of inertia, respectively;
the tail wing guide torque;
the rotation angle of the elastic axis coordinate system and the relative speed coordinate system is obtained;
is the rotation angle of the second elastic axis coordinate system; wherein the subscriptTRepresenting the target.
9. The method of claim 7, wherein the received radar signals are used for storage and transformation, and under the action of the simulated ballistic signals, the radiation is extracted again for reception by the radar signals, so as to form echo data of the simulated projectile.
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