CN110031810A - A kind of monopulse radar penalty coefficient automatic correction system - Google Patents
A kind of monopulse radar penalty coefficient automatic correction system Download PDFInfo
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- CN110031810A CN110031810A CN201910305335.7A CN201910305335A CN110031810A CN 110031810 A CN110031810 A CN 110031810A CN 201910305335 A CN201910305335 A CN 201910305335A CN 110031810 A CN110031810 A CN 110031810A
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
Abstract
The invention discloses a kind of monopulse radar penalty coefficient automatic correction systems, it include: tested radar (1), data collector (2), program-controlled voltage table (3), signal source (4), electromagnetic horn (5), antenna holder (6) and comprehensive control module (7), SERVO CONTROL interconnecting module (8), A/D compensating parameter correction module (9), D/A compensating parameter correction module (10), phase compensation parameter correction module (11), S curve slope correction module (12).The system generates radar signal by signal source, in conjunction with instrument remote control technology, compensating parameter correction course is carried out procedure control by program, automatically correcting for radar compensating parameter may be implemented, improve parameter correction efficiency.
Description
Technical field
The present invention relates to a kind of radar penalty coefficients to correct system, especially a kind of automatic school of monopulse radar penalty coefficient
Positive system.
Background technique
Monopulse radar system has very high angle-measurement accuracy, and realizes simply, is widely used.Monopulse radar system
Monopulse ratio system is used as unified, and antenna rotation is driven using mechanical servo, sweeps antenna beam in space
It retouches, after antenna receives target echo signal, through sum-difference network synthesis and gun parallax, trim (hereinafter referred to as with difference poor) three
Channel radio frequency signal, Radar Receiver System amplifies radiofrequency signal, output and gun parallax, trim intermediate frequency are believed after variable-frequency filtering
Number, triple channel intermediate-freuqncy signal is sampled by radar signal processor (letter), after being accumulated, being detected to digital signal,
Calculate difference with and Amplitude Ratio (difference ratio and value), and target angle is calculated by the corresponding relationship (S curve) of difference ratio and value and angle
Deviation.Due to the otherness of hardware system performance, monopulse radar is needed before factory to relevant to hardware system otherness
Parameter compensates, the parameter for needing to compensate mainly include servo and letter between modulus (A/D) and digital-to-analogue (D/A) convert
Error parameter, S curve slope and the poor triple channel phase compensation parameter of difference etc., currently used method is joined for each compensation
Number is individually tested, the corresponding a set of correcting process of each test, and needs to be updated Radar Signal Processing software, is existed
The problem of inefficiency；A possibility that data management simultaneously is chaotic, and test data needs manual record, and human factor leads to mistake
It is very high.
Summary of the invention
It is an object of that present invention to provide a kind of monopulse radar penalty coefficient automatic correction systems, solve conventional method efficiency
It is low, the degree of automation is not high, human factor influences big problem.
A kind of monopulse radar penalty coefficient automatic correction system of the invention comprising: tested radar, data acquisition
Device, program-controlled voltage table, signal source, electromagnetic horn, antenna holder and comprehensive control module, SERVO CONTROL interconnecting module, A/D
Compensating parameter correction module, D/A compensating parameter correction module, phase compensation parameter correction module, S curve slope correction module,
Wherein, it is tested between radar and comprehensive control module and is connected by bus；Comprehensive control module output end is compensated with A/D respectively joins
The input terminal connection of number correction module, D/A compensating parameter correction module, S curve slope correction module；At the signal of tested radar
Reason machine is connect with the control instruction output end of tested Radar Servo with the input terminal of SERVO CONTROL interconnecting module, servo interconnecting module
Output end connect respectively with the SERVO CONTROL command input of program-controlled voltage table and tested radar；Tested Radar Receiver System is defeated
Out and trim, three tunnel intermediate-freuqncy signal of gun parallax connect respectively with the input terminal of data collector；The output of data collector
End is connect with the input terminal of phase compensation parameter correction module, S curve slope correction module；The comprehensive control module is according to thunder
The working condition of the communication protocol control radar reached carries out work filling comprising and operating mode setting, servo angle are preset,
Read servo angle, the range information that radar returns；SERVO CONTROL interconnecting module is watched the signal processor of radar and radar
The control interface for taking control system is connected by interconnecting device；A/D compensating parameter correction module receives comprehensive control module output
Servo angle information subtracts each other with the instruction angle of comprehensive control module, and calculates error mean as A/D offset；D/A compensation
Parameter correction module receives the voltage value of program-controlled voltage table output, is changed the voltage value according to the linear relationship of voltage value and angle
It is counted as angle, and the servo frame corners instruction angle that the angle is provided with comprehensive control module is subtracted each other, error mean is calculated and makees
For D/A offset；Phase compensation parameter correction module is collected to data collector and trim, three road signal of gun parallax
It is handled, calculates phase compensation value；S curve slope correction module is collected to data collector and trim, gun parallax
Three road signals are handled, and calculate the corresponding poor ratio of different angular displacement and value, and oblique using least square fitting method calculating S curve
Rate.
Wherein, the A/D compensating parameter correction module receives the servo angle information of comprehensive control module output, with synthesis
The instruction angle of control module is subtracted each other, and calculating error mean as A/D offset includes: that comprehensive control module provides tested radar
Angle command, the pitching of control radar servo and orientation frame corners are from negative extreme angles to positive limit angle stepping；A/D compensation
Parameter correction module reads the servo actual angle that mixing console 7 provides；Actual angle is subtracted with instruction angle, is obtained current
Angular error under angle；All angles are traversed, are averaged to all angular deviations, as A/D compensating parameter.
Wherein, the voltage value for receiving the output of program-controlled voltage table, will according to the linear relationship of voltage value and servo angle
The voltage value is converted into measurement angle, and the servo frame corners instruction angle provided with comprehensive control module is subtracted each other, and error is calculated
Mean value includes: that comprehensive control module provides tested radar angular instruction, the pitching of control radar servo and side as D/A offset
Position frame corners are from negative extreme angles to positive limit angle stepping；D/A compensating parameter correction module records program-controlled electric during stepping
Meter reading is pressed, the voltage data of reading is converted into measurement angle according to the linear relationship of voltage and angle；Subtracted with instruction angle
Measurement angle is gone, the angular error under current angular is obtained；All angles are traversed, are averaged to all angular errors, are made
For D/A compensating parameter.
Wherein, the phase compensation parameter correction module is collected to data collector and trim, three tunnel of gun parallax
Signal is handled, and calculating phase compensation value includes: adjustment electromagnetic horn position, so that the beam center of electromagnetic horn and tested
The antenna beam center of radar is overlapped；Comprehensive control module control radar servo azimuth and pitch angle are respectively φ, θ, φ, θ
Value should meet φ ∈ [φ3dB/4,φ3dB/ 2], θ ∈ [θ3dB/4,θ3dB/ 2], φ3dB、θ3dBRespectively indicate tested radar antenna edge
Orientation and pitching to 3dB beam angle；Signal source exports continuous wave signal, the signal frequency and radar working signal frequency
Unanimously, which guarantees that radar works normally；Data collector acquires tested radar and trim, gun parallax triple channel
IF output signal, and by acquisition data export to phase compensation parameter correction module；Phase compensation parameter correction module point
Baseband signal will not be carried out just with trim, gun parallax triple channel intermediate-freuqncy signal Digital Down Convert to base band, signal processor
It hands over demodulation to obtain I, the Q component of Three-channel data, uses IΣ、QΣ； It respectively indicates and gun parallax and pitching
I, the Q component of difference；Phase compensation parameter correction module calculates compensation phaseGun parallax and trim channel and the channel and afterwards
I, the inner product of Q component, such as formula (1), (2), wherein
Phase compensation parameter correction module calculates so that ai>'s 0 is allAverage valueAs gun parallax channel
Phase compensation value；Similarly, phase compensation parameter correction module calculates so that bi>'s 0 is allAverage valueAs
The phase compensation value in trim channel.
Wherein, the S curve slope correction module is collected to data collector 2 and trim, three road of gun parallax are believed
It number is handled, calculates the corresponding difference ratio of different angular displacement and value, and using least square fitting method calculating S curve slope packet
It includes: adjustment electromagnetic horn position, so that the beam center of electromagnetic horn is overlapped with the antenna beam center of tested radar；Signal source
Continuous wave signal is exported, signal frequency is consistent with radar working signal frequency, and signal power guarantees that radar works normally；Comprehensive control
7 control radar servo orientation frame corners of molding block are from-φ3dBWith 0.01 ° of stepping to φ3dBVariation；Data collector acquisition is tested
The IF output signal of radar and trim, gun parallax triple channel, and acquisition data are exported to S curve slope correction module；
S curve slope correction module respectively will with trim, gun parallax triple channel intermediate-freuqncy signal Digital Down Convert to base band, extract and
Trim, the I of gun parallax Three-channel data, Q component calculate difference ratio and value, formula are as follows:
S curve slope correction module automatically records and saves all frame corners and its corresponding difference ratio and value, passes through minimum
The proportionality coefficient at two multiplication algorithm Computational frame angles and difference ratio and value, as tested radar bearing to S curve slope；It can similarly calculate
Pitching is to S curve slope.
The present invention generates radar signal by signal source, in conjunction with instrument remote control technology, by compensating parameter correction course
Procedure control is carried out by program, automatically correcting for radar compensating parameter may be implemented, improves parameter correction efficiency.
Detailed description of the invention
Fig. 1 is the structural block diagram of monopulse radar penalty coefficient automatic correction system of the present invention.
1. 5. electromagnetic horn of tested 2. data collector of radar 3. program-controlled voltage table, 4. signal source, 6. antenna holder 7. is comprehensive
8. SERVO CONTROL interconnecting module 9.A/D compensating parameter correction module 10.D/A compensating parameter correction module of control module, 11. phase
Compensating parameter correction module 12.S slope of curve correction module
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with attached drawing.
A kind of monopulse radar penalty coefficient automatic correction system proposed by the present invention includes: tested radar 1, data acquisition
Device 2, program-controlled voltage table 3, signal source 4, electromagnetic horn 5, antenna holder 6 and comprehensive control module 7, SERVO CONTROL switching model
Block 8, A/D compensating parameter correction module 9, D/A compensating parameter correction module 10, phase compensation parameter correction module 11, S curve are oblique
Rate correction module 12.
Wherein, it is tested between radar 1 and comprehensive control module 7 and is connected by bus；7 output end of comprehensive control module difference
It is connect with the input terminal of A/D compensating parameter correction module 9, D/A compensating parameter correction module 10, S curve slope correction module 12；
The input of the control instruction output end and SERVO CONTROL interconnecting module 8 of the signal processor and tested 1 servo of radar of tested radar 1
End connection, the output end of the servo interconnecting module 8 SERVO CONTROL command input with program-controlled voltage table 3 and tested radar 1 respectively
Connection；It is defeated with data collector 2 respectively that tested radar 1 receives that system exports and trim, three tunnel intermediate-freuqncy signal of gun parallax
Enter end connection；The output end of data collector 2 and phase compensation parameter correction module 11, S curve slope correction module 12 it is defeated
Enter end connection；The comprehensive control module 7 carries out work filling according to the working condition of the communication protocol control radar of radar 1,
It include operating mode setting, servo angle it is preset, read radar 1 return servo angle, range information.
SERVO CONTROL interconnecting module 8 leads to the signal processor of radar 1 and the control interface of the servo-control system of radar 1
Cross interconnecting device connection.
A/D compensating parameter correction module 9 receives the servo angle information that comprehensive control module 7 exports, with comprehensively control mould
The instruction angle of block 7 is subtracted each other, and calculates error mean as A/D offset.Specifically, comprehensive control module 7 provides tested thunder
Up to 1 angle command, the pitching of control radar servo and orientation frame corners are from negative extreme angles to positive limit angle stepping；A/D
Compensating parameter correction module 9 reads the servo actual angle that mixing console 7 provides；Actual angle is subtracted with instruction angle, is obtained
Obtain the angular error under current angular；All angles are traversed, are averaged to all angular deviations, as A/D compensating parameter.
D/A compensating parameter correction module 10 receives the voltage value that program-controlled voltage table 3 exports, according to the line of voltage value and angle
The voltage value is converted and is at an angle of by sexual intercourse, and the servo frame corners that the angle and comprehensive control module 7 are provided instruct angle
Subtract each other, calculates error mean as D/A offset.Specifically, comprehensive control module 7 provides tested radar angular instruction, control
The pitching of Radar Servo and orientation frame corners are from negative extreme angles to positive limit angle stepping；D/A compensating parameter correction module 10
Program-controlled voltage table 3 is read during recording stepping, and the voltage data of reading is converted into according to the linear relationship of voltage and angle
Measurement angle；Measurement angle is subtracted with instruction angle, obtains the angular error under current angular；All angles are traversed, to institute
Some angular errors are averaged, as D/A compensating parameter.
Phase compensation parameter correction module 11 is collected to data collector 2 and trim, three road signal of gun parallax into
Row processing, calculates phase compensation value.Specifically, adjustment 5 position of electromagnetic horn, so that the beam center of electromagnetic horn 5 and tested
The antenna beam center of radar 1 is overlapped；7 control radar servo azimuth of comprehensive control module and pitch angle are respectively φ, θ, φ,
θ value should meet φ ∈ [φ3dB/4,φ3dB/ 2], θ ∈ [θ3dB/4,θ3dB/ 2], φ3dB、θ3dBRespectively indicate tested radar antenna
Along orientation and pitching to 3dB beam angle；Signal source exports continuous wave signal, the signal frequency and radar working signal frequency
Rate is consistent, which guarantees that radar works normally；Data collector acquires tested radar and trim, gun parallax threeway
The IF output signal in road, and acquisition data are exported to phase compensation parameter correction module；Phase compensation parameter correction module
Baseband signal will be carried out with trim, gun parallax triple channel intermediate-freuqncy signal Digital Down Convert to base band, signal processor respectively
Quadrature demodulation obtains I, the Q component of Three-channel data, uses IΣ、QΣ； It respectively indicates and gun parallax and bows
Face upward I, the Q component of difference；Phase compensation parameter correction module 11 calculates compensation phaseRear gun parallax and trim channel with and
The inner product of channel I, Q component, such as formula (1), (2), wherein
Phase compensation parameter correction module 11 calculates so that ai>'s 0 is allAverage valueIt is logical as gun parallax
The phase compensation value in road；Similarly, phase compensation parameter correction module 11 calculates so that bi>'s 0 is allAverage valueMake
For the phase compensation value in trim channel.
S curve slope correction module 12 is collected to data collector 2 and trim, three road signal of gun parallax carry out
Processing calculates the corresponding poor ratio of different angular displacement and value, and calculates S curve slope using least square fitting method.Specifically, adjusting
Whole electromagnetic horn position, so that the beam center of electromagnetic horn is overlapped with the antenna beam center of tested radar；Signal source output
Continuous wave signal, signal frequency is consistent with radar working signal frequency, and signal power guarantees that radar works normally；Comprehensively control mould
7 control radar servo orientation frame corners of block are from-φ3dBWith 0.01 ° of stepping to φ3dBVariation；Data collector 2 acquires tested radar
With the IF output signal of trim, gun parallax triple channel, and by acquisition data export to S curve slope correction module；S is bent
Line slope correction module will extract and bow with trim, gun parallax triple channel intermediate-freuqncy signal Digital Down Convert to base band respectively
Poor, gun parallax Three-channel data I, Q component are faced upward, difference ratio is calculated and value, formula is as follows:
S curve slope correction module 12 automatically records and saves all frame corners and its corresponding difference ratio and value, by most
The proportionality coefficient at small two multiplication algorithms Computational frame angle and difference ratio and value, as tested radar bearing to S curve slope；It can similarly count
Pitching is calculated to S curve slope.The present invention generates radar signal by signal source, and in conjunction with instrument remote control technology, compensation is joined
Number correction course carries out procedure control by program, and automatically correcting for radar compensating parameter may be implemented, and improves parameter correction
Efficiency.
Claims (5)
1. a kind of monopulse radar penalty coefficient automatic correction system, characterized in that it comprises: tested radar (1), data are adopted
Storage (2), program-controlled voltage table (3), signal source (4), electromagnetic horn (5), antenna holder (6) and comprehensive control module (7),
SERVO CONTROL interconnecting module (8), A/D compensating parameter correction module (9), D/A compensating parameter correction module (10), phase compensation ginseng
Number correction module (11), S curve slope correction module (12), wherein
It is connect between tested radar (1) and comprehensive control module (7) by bus；Comprehensive control module (7) output end respectively with
A/D compensating parameter correction module (9), D/A compensating parameter correction module (10), S curve slope correction module (12) input terminal
Connection；The signal processor of tested radar (1) and the control instruction output end of tested radar (1) servo and SERVO CONTROL switching model
The input terminal of block (8) connects, and the output end of servo interconnecting module (8) is watched with program-controlled voltage table (3) and tested radar (1) respectively
Take the connection of control instruction input terminal；Tested radar (1) receives dividing with trim, three tunnel intermediate-freuqncy signal of gun parallax for system output
It is not connect with the input terminal of data collector (2)；The output end and phase compensation parameter correction module of data collector (2)
(11), the input terminal connection of S curve slope correction module (12)；The comprehensive control module 7 is according to the communication protocol of radar (1)
The working condition of control radar carries out work filling comprising operating mode setting, servo angle are preset, read radar (1) and return
Return servo angle, range information；
SERVO CONTROL interconnecting module (8) is by the control interface of the signal processor of radar (1) and the servo-control system of radar (1)
It is connected by interconnecting device；
A/D compensating parameter correction module (9) receives the servo angle information of comprehensive control module (7) output, with comprehensively control mould
The instruction angle of block (7) is subtracted each other, and calculates error mean as A/D offset；
D/A compensating parameter correction module (10) receives the voltage value of program-controlled voltage table (3) output, according to the line of voltage value and angle
The voltage value is converted and is at an angle of by sexual intercourse, and the servo frame corners instruction angle that the angle and comprehensive control module (7) are provided
Degree subtracts each other, and calculates error mean as D/A offset；
Phase compensation parameter correction module (11) is collected to data collector 2 and trim, three road signal of gun parallax carry out
Processing calculates phase compensation value；
S curve slope correction module (12) is collected to data collector 2 and trim, three road signal of gun parallax at
Reason calculates the corresponding poor ratio of different angular displacement and value, and calculates S curve slope using least square fitting method.
2. monopulse radar penalty coefficient automatic correction system according to claim 1, which is characterized in that the A/D is mended
Repay the servo angle information that parameter correction module (9) receive comprehensive control module (7) output, the finger with comprehensive control module (7)
Angle is enabled to subtract each other, calculating error mean as A/D offset includes: that comprehensive control module (7) provides the angle of tested radar 1 and refers to
It enables, the pitching of control radar servo and orientation frame corners are from negative extreme angles to positive limit angle stepping；The correction of A/D compensating parameter
Module (9) reads the servo actual angle that mixing console (7) provide；Actual angle is subtracted with instruction angle, anterior angle is worked as in acquisition
Angular error under degree；All angles are traversed, are averaged to all angular deviations, as A/D compensating parameter.
3. monopulse radar penalty coefficient automatic correction system according to claim 1, which is characterized in that the reception journey
The voltage value is converted into measurement angle according to the linear relationship of voltage value and servo angle by the voltage value for controlling voltmeter (3) output
Degree, and the servo frame corners instruction angle provided with comprehensive control module (7) is subtracted each other, and calculates error mean as D/A offset
It include: that comprehensive control module (7) provides the instruction of tested radar angular, the pitching of control radar servo and orientation frame corners are from cathode
Angle is limited to positive limit angle stepping；Program-controlled voltage table (3) is read during D/A compensating parameter correction module (10) records stepping
Number, is converted into measurement angle according to the linear relationship of voltage and angle for the voltage data of reading；Measurement is subtracted with instruction angle
Angle obtains the angular error under current angular；All angles are traversed, are averaged to all angular errors, are mended as D/A
Repay parameter.
4. monopulse radar penalty coefficient automatic correction system according to claim 2, which is characterized in that the phase is mended
It repays that parameter correction module (11) is collected to data collector (2) and trim, three road signal of gun parallax are handled, counts
Calculating phase compensation value includes: adjustment electromagnetic horn (5) position, so that the beam center of electromagnetic horn (5) and tested radar (1)
Antenna beam center is overlapped；Comprehensive control module (7) control radar servo azimuth and pitch angle are respectively φ, θ, φ, θ value
φ ∈ [φ should be met3dB/4,φ3dB/ 2], θ ∈ [θ3dB/4,θ3dB/ 2], φ3dB、θ3dBTested radar antenna is respectively indicated along orientation
To and pitching to 3dB beam angle；Signal source exports continuous wave signal, the signal frequency and radar working signal frequency one
It causes, which guarantees that radar works normally；Data collector acquires tested radar and trim, gun parallax triple channel
IF output signal, and acquisition data are exported to phase compensation parameter correction module；Phase compensation parameter correction module difference
Baseband signal will be carried out orthogonal with trim, gun parallax triple channel intermediate-freuqncy signal Digital Down Convert to base band, signal processor
Demodulation obtains I, the Q component of Three-channel data, uses IΣ、QΣ；It respectively indicates and gun parallax and pitching
I, the Q component of difference；Phase compensation parameter correction module (11) calculates compensation phaseRear gun parallax and trim channel with and
The inner product of channel I, Q component, such as formula (1), (2), wherein
Phase compensation parameter correction module (11) calculates so that ai>'s 0 is allAverage valueAs gun parallax channel
Phase compensation value；Similarly, phase compensation parameter correction module (11) calculates so that bi>'s 0 is allAverage valueMake
For the phase compensation value in trim channel.
5. monopulse radar penalty coefficient automatic correction system according to claim 4, which is characterized in that
The S curve slope correction module (12) is collected to data collector 2 and trim, three road signal of gun parallax into
Row processing calculates the corresponding poor ratio of different angular displacement and value, and calculating S curve slope using least square fitting method includes: to adjust
Whole electromagnetic horn position, so that the beam center of electromagnetic horn is overlapped with the antenna beam center of tested radar；Signal source output
Continuous wave signal, signal frequency is consistent with radar working signal frequency, and signal power guarantees that radar works normally；Comprehensively control mould
7 control radar servo orientation frame corners of block are from-φ3dBWith 0.01 ° of stepping to φ3dBVariation；Data collector (2) acquires tested thunder
It exports up to the IF output signal with trim, gun parallax triple channel, and by acquisition data to S curve slope correction module；S
Slope of curve correction module respectively will with trim, gun parallax triple channel intermediate-freuqncy signal Digital Down Convert to base band, extract and
Trim, the I of gun parallax Three-channel data, Q component calculate difference ratio and value, formula are as follows:
S curve slope correction module 12 automatically records and saves all frame corners and its corresponding difference ratio and value, passes through minimum two
The proportionality coefficient at multiplication algorithm Computational frame angle and difference ratio and value, as tested radar bearing to S curve slope；It can similarly calculate and bow
It faces upward to S curve slope.
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| CN110824449A (en) * | 2019-12-16 | 2020-02-21 | 西安电子工程研究所 | Automatic calibration test method for multi-frequency-point radar seeker |
| CN111722194A (en) * | 2020-06-12 | 2020-09-29 | 零八一电子集团有限公司 | Error real-time compensation system for searching radar azimuth system |
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