CN110221260A - A kind of distributed broadband microwave target simulator design method - Google Patents
A kind of distributed broadband microwave target simulator design method Download PDFInfo
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- CN110221260A CN110221260A CN201910487053.3A CN201910487053A CN110221260A CN 110221260 A CN110221260 A CN 110221260A CN 201910487053 A CN201910487053 A CN 201910487053A CN 110221260 A CN110221260 A CN 110221260A
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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
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
A kind of distributed broadband microwave target simulator design method, sextuple target satellite turntable is constructed first, 6 DOF tracking star turntable, and radar antenna and radar pointing component are placed respectively, receiver rf front-end, and use high frequency cable connection high frequency transmitting-receiving subassembly and receiver rf front-end, then by horn mouth, the signal processing unit of radar simulator, high frequency cable is arranged in target satellite turntable backboard, and avoid interference with cable, the high-frequency radio frequency cable for reaching target satellite turntable backboard is connected with the signal processing unit of radar simulator, radiofrequency signal exports the horn mouth to target satellite turntable after signal processing unit is modulated, horn mouth is according to radiofrequency signal, it generates feedback signal and is sent by high frequency cable to the pointing radar on tracking star turntable, complete the adjustment of horn mouth polarity and pointing radar, finally by pointing radar to radar The measurement data of target simulator passes to GNC computer, opens the operation of GNC Relative Navigation, assesses Relative Navigation precision.
Description
Technical field
The present invention relates to Satellite Experiment field, especially a kind of distributed broadband microwave target simulator design method.
Background technique
With the complexity of satellite task, multifarious raising, for satellite peripheral object detection demand also increasingly
Height, not only needs to measure the orientation of target, and the relative distance that be more accurately positioned between satellite completes Relative Navigation task.
Radar pointing has been widely applied to satellite fields because of the features such as its detection range is remote, and range measurement accuracy is high.
For the measurement accuracy and Relative Navigation precision of verifying satellites radar pointing, need to carry out verification experimental verification on ground.
At home during Project R&D, ground experiment is all that the mode of target quiescent is tested, and target is stationary, and radar is penetrated
Pass through horn mouth after frequency signal modulation and is reflected to radar antenna realization closed loop.This mode can modulate range information into letter
In number, and the placement of target simulator and distance by radar is closer, however the shortcomings that this mode be can not will be true
Azimuth information is measured, and the system more demanding for Relative Navigation can not just verify the working effect of radar, can not be real-time
The expected effect of ground experiment is not achieved in dynamic evaluation radar measurement accuracy and navigation accuracy.
Therefore need to design one kind can comprehensive assessment radar performance, especially be used for Relative Navigation precision test radar
Target simulator.
Summary of the invention
Technical problem solved by the present invention is for radar in current Satellite Experiment system can not full physics access closed loop
The defect of control proposes a kind of design method of radar simulator, is that the access satellite ground of the full physics of radar pointing tries
Check system provides effective target simulation source, completes the Relative Navigation test of satellite platform.
The technical solution of the invention is as follows: a kind of distributed broadband microwave target simulator design method, including as follows
Step:
(1) sextuple target satellite turntable, sextuple tracking star turntable are constructed, places radar antenna and radar on tracking star turntable
Pointing component, before installing the radio frequency reception of radar simulator used in radar target simulation on tracking star turntable backboard
End uses the high frequency transmitting-receiving subassembly and receiver rf front-end in high frequency cable connection radar pointing component, wherein before radio frequency reception
End can send the radiofrequency signal of radar；
(2) horn mouth, the signal processing unit of radar simulator, high frequency cable are arranged in target satellite turntable back
Plate, and avoid the movement interference cable of sextuple target satellite turntable, sextuple tracking star turntable；Wherein, sextuple target satellite turntable, 6 DOF
Tracking star turntable can be with relative motion；
(3) the signal processing unit phase of the high-frequency radio frequency cable and radar simulator of target satellite turntable backboard is reached
Even, radiofrequency signal exports the horn mouth to target satellite turntable after signal processing unit is modulated；
(4) horn mouth on target satellite turntable is controlled according to radiofrequency signal, is generated feedback signal and is sent by high frequency cable
To tracking star turntable on pointing radar, control target satellite turntable trunnion axis until target satellite turntable on horn mouth polarity with
Pointing radar is consistent；
(5) measurement data of the pointing radar to radar simulator is passed into GNC computer, opens GNC and leads relatively
Shipping is calculated, and Relative Navigation precision is assessed.
The sextuple target satellite turntable, sextuple tracking star turntable all can be multiple, include three-dimensional translating turntable, three
Tie up rotating table.
The relative motion of the sextuple target satellite turntable, sextuple tracking star turntable is dynamics simulation computer control,
Realize the adjustment of two star relative angles.
The radar simulator signal processing unit be modulated to modulate the relative distance of two stars, relative velocity into
In the radiofrequency signal issued by radar.
Feedback signal is sent by high frequency cable to when tracking the pointing radar on star turntable in the step (4), is used
Amplification, filtering is adjusted in signal amplification unit, noise filter.
The output signal of the signal processing unit is sent by the interface adapted to radar.
The dynamics simulation computer can real-time display 6 DOF target satellite turntable, sextuple tracking star turntable it is opposite
Distance, relative angle, realize two astrologies adjust the distance, the adjustment of relative angle.
A kind of distributed broadband microwave target simulator, including receiver rf front-end, signal processing unit, in which:
It tracks and places radar antenna and radar pointing component on star turntable, track and radar target mould is installed on star turntable backboard
Intend the receiver rf front-end of radar simulator used, before the high frequency transmitting-receiving subassembly and radio frequency reception in radar pointing component
End is connected by high frequency cable；
Horn mouth, the signal processing unit of radar simulator, high frequency cable are arranged on target satellite turntable backboard, and six
Tie up target satellite turntable, the movement portion of sextuple tracking star turntable interferes cable；
The high-frequency radio frequency cut cable of target satellite turntable backboard is connected with the signal processing unit of radar simulator, radio frequency
Signal exports the horn mouth to target satellite turntable after signal processing unit is modulated；
Horn mouth on target satellite turntable generates feedback signal and is sent by high frequency cable to tracking star according to radiofrequency signal
Pointing radar on turntable, wherein the trunnion axis of target satellite turntable makes horn mouth polarity and pointing thunder on target satellite turntable
Up to consistent.
It further include signal processing unit host computer, signal processing unit host computer generates modulation letter input, so that radar mesh
Mark simulator signal processing unit can modulate the relative distance of two stars, relative velocity into the radiofrequency signal issued by radar
In.
It further include dynamics simulation computer, dynamics simulation computer controls sextuple target satellite turntable, 6 DOF.
The advantages of the present invention over the prior art are that:
(1) present invention improves the application scenarios of radar simulator first, decontrols and limits bell-mouthed movement, takes
It is downloaded on motion simulator, more comprehensively measures the angle and distance of target, preferably examined in the environment of full physics
The single machine performance of radar；
(2) present invention combines true in-orbit operating condition, and examination Relative Navigation precision can be gone in conjunction with radar single machine performance, and
And there is very high versatility；
(3) microwave band of the present invention can select different wave bands according to the difference of delivery outlet, including common X, Ka, Ku
Wave band, application range have very high versatility；Signal processing unit can receive GNC dynamic information in the present invention, simulation
Corresponding echo-signal out can be generated with satellite ground test platform and be associated and feature of the invention.
Detailed description of the invention
Fig. 1 is the principle connection figure of the method for the present invention correspondence system.
Specific embodiment
The present invention for radar in current Satellite Experiment system can not full physics access closed-loop control defect, propose one
The design method of kind radar simulator, the access Satellite Ground Testing System for the full physics of radar pointing provide effective mesh
Simulation source is marked, the Relative Navigation test of satellite platform is completed.The present invention is realized by the following technical solution:
(1) a set of distributed design layout is designed, by the receiver rf front-end and signal processing of radar simulator
Unit separates.The input of receiver rf front-end is the radiofrequency signal of radar output, receiver rf front-end and radar high frequency transmitting-receiving group
Part design placement is closely located, guarantees the synchronism of signal and facilitates the input of reference signal.And radar simulator signal
Processing unit is separated with Radar Design, and modulated radiofrequency signal directly can be transmitted to horn mouth by processing unit, is put in this way
Bell-mouthed movement limitation has been opened, horn mouth has been placed on a moveable platform, so that it may realize the opposite of simulation source
Movement.
(2) a set of signal maintenance system is devised, because distance is farther out between radiofrequency signal input and feedback signal, in order to
True in-orbit operating condition is simulated, the two distance may need to reach tens of meters of distance, due to the decaying of signal, it is necessary to pass in signal
Signal maintenance system, addition signal amplification appropriate, the tools such as noise filter are added in passing.
(3) a set of radar simulator signal modulation host computer is designed, this host computer is as radar simulator
The modulation of signal processing unit inputs.Its function includes:
(31) there is visual interface, modulated range information can be monitored in real time.
(32) there is distance correction function, because radar surveying distance was measured by the back wave time of feedback,
Because the transmission of radiofrequency signal must affect the time of feedback wave, however measurement error brought by this delay is fixed inclined
Difference, if it is possible to be narrowed down to error within accuracy rating by way of software correction, so that it may avoid such error.
(33) there is external input control interface, Satellite Experiment simulation space environment is often simulated with dynamics simulation
, two astrologies of simulation are adjusted the distance, and are matched in real time with entire experimental enviroment, are needed host computer that simulated range information is issued thunder
Up to target simulator signal processing unit.
(4) wave band designed meets each band requirement, in order to enable the simulator can be widely applied to each frequency range
Radar Products, improve versatility.
For using radar simulator on Relative Navigation double six degree-of-freedom test platform, implementation process, phase are provided
Be made of to navigation double six degree-of-freedom test two 6 DOF (three-dimensional translating adds Three dimensional rotation) turntables (becomes target separately below
Star turntable, tracking star turntable), turntable table top can place horn mouth or radar antenna (for radar pointing), it is desirable that comprehensively
Examination radar measurement accuracy simultaneously verifies Relative Navigation precision.System connection figure is as shown in Figure 1.First tracking star turntable on mesh
It marks and places radar antenna and horn mouth on star turntable, then be transmitted to the radiofrequency signal of radar from star-pursuing turntable turntable by cable
On target satellite turntable horn mouth.Star turntable is tracked by dynamics Controlling again and target satellite turntable does two star relative motions, radar mesh
Mark simulator signal processing unit two astrologies in dynamics are adjusted the distance modulate into the radiofrequency signal issued by radar and by
Horn mouth is reflected to radar antenna.The relative angle of such two star is completed by the relative motion of two turntables, and distance is by radar mesh
It marks simulator modulation to complete, realizes radar access system closed loop.
Specific embodiment is as follows:
1, radar antenna and radar pointing other assemblies are placed on tracking star turntable first, on tracking star turntable backboard
The radio-frequency front-end for installing radar target simulation connects the high frequency transmitting-receiving subassembly and receiving front-end of radar pointing by high frequency cable.
Receiving front-end passes through matching criteria signal, and after time synchronization, the radiofrequency signal of radar is spread out of.
2, then the high frequency cable of transmitting signal by walking the movement guide chain of Relative Navigation double six degree-of-freedom test platform
Cable is wired to target satellite turntable backboard by wire laying mode, in this way can be to avoid interference of the movement to cable of sextuple turntable.
3, reach the radio-frequency cable of the backboard of target satellite turntable at the radar simulator signal that is placed on backboard
Unit R F1 mouthful of reason is connected, radiofrequency signal after ovennodulation (mainly in Doppler modulation method), output signal is defeated from Ka mouthfuls
(radar used is Ka wave band) out.It is connected by cable with the horn mouth being placed on target satellite turntable.
4, it is mounted with signal maintenance equipment between target satellite turntable and tracking star turntable cable, mainly by signal amplification unit
It constitutes, amplification coefficient can be adjusted.
5, radar simulator signal processing unit has network communication mouth, can receive signal processing unit host computer
Required modulation information.
6, after Satellite Experiment system connects, radar measured data passes to GNC computer, and dynamics simulation machine will be
The location information of rail operating condition guides turntable to do relative motion to Relative Navigation double six degree-of-freedom test platform, has used wait ratios here
The method of example scaling.It is upper that two astrologies of dynamics simulation adjust the distance, relative velocity by network passes to signal processing unit
Machine, and radar simulator signal processing unit is transmitted to by it.
7, after system building completion, pass through the amplification coefficient of adjustment signal amplifying unit first, be adjusted to radar reception
To echo-signal, it is then rotated further by the trunnion axis of target satellite turntable, until horn mouth polarity is consistent with radar antenna, that is, is received back
Wave signal is maximum.Kinetic model is run at this time, and synchronous with Relative Navigation double six degree-of-freedom test platform, it is opposite to open GNC
Navigation operations assess Relative Navigation precision.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (10)
1. a kind of distributed broadband microwave target simulator design method, it is characterised in that include the following steps:
(1) sextuple target satellite turntable, sextuple tracking star turntable are constructed, places radar antenna and radar pointing on tracking star turntable
Component is installed the receiver rf front-end of radar simulator used in radar target simulation on tracking star turntable backboard, is made
With the high frequency transmitting-receiving subassembly and receiver rf front-end in high frequency cable connection radar pointing component, wherein receiver rf front-end energy
Enough send the radiofrequency signal of radar；
(2) horn mouth, the signal processing unit of radar simulator, high frequency cable are arranged in target satellite turntable backboard, and
Avoid the movement interference cable of sextuple target satellite turntable, sextuple tracking star turntable；Wherein, sextuple target satellite turntable, sextuple tracking
Star turntable can be with relative motion；
(3) the high-frequency radio frequency cable for reaching target satellite turntable backboard is connected with the signal processing unit of radar simulator, penetrates
Frequency signal exports the horn mouth to target satellite turntable after signal processing unit is modulated；
(4) horn mouth on target satellite turntable is controlled according to radiofrequency signal, generates feedback signal and is sent by high frequency cable to chasing after
Pointing radar on track star turntable controls the trunnion axis of target satellite turntable up to the horn mouth polarity and pointing on target satellite turntable
Radar is consistent；
(5) measurement data of the pointing radar to radar simulator is passed into GNC computer, opens GNC Relative Navigation fortune
It calculates, assesses Relative Navigation precision.
2. a kind of distributed broadband microwave target simulator design method according to claim 1, it is characterised in that: described
Sextuple target satellite turntable, sextuple tracking star turntable all can be multiple, include three-dimensional translating turntable, Three dimensional rotation turntable.
3. a kind of distributed broadband microwave target simulator design method according to claim 1, it is characterised in that: described
The relative motion of sextuple target satellite turntable, sextuple tracking star turntable be that dynamics simulation computer controls, two stars of realization are opposite
The adjustment of angle.
4. a kind of distributed broadband microwave target simulator design method according to claim 3, it is characterised in that: described
Radar simulator signal processing unit be modulated to modulate the relative distance of two stars, relative velocity into being issued by radar
In radiofrequency signal.
5. a kind of distributed broadband microwave target simulator design method according to claim 4, it is characterised in that: described
The step of (4) in feedback signal by high frequency cable send to tracking star turntable on pointing radar when, using signal amplification unit,
Amplification, filtering is adjusted in noise filter.
6. a kind of distributed broadband microwave target simulator design method according to claim 5, it is characterised in that: described
The output signal of signal processing unit sent by the interface that is adapted to radar.
7. a kind of distributed broadband microwave target simulator design method according to claim 6, it is characterised in that: described
Dynamics simulation computer being capable of real-time display 6 DOF target satellite turntable, the relative distance of sextuple tracking star turntable, relative angle
Degree, realize two astrologies adjust the distance, the adjustment of relative angle.
8. a kind of distributed broadband microwave target simulator, it is characterised in that including receiver rf front-end, signal processing unit,
In:
It tracks and places radar antenna and radar pointing component on star turntable, track and radar target simulation institute is installed on star turntable backboard
The receiver rf front-end of radar simulator, the high frequency transmitting-receiving subassembly and receiver rf front-end in radar pointing component are logical
Cross high frequency cable connection；
Horn mouth, the signal processing unit of radar simulator, high frequency cable are arranged on target satellite turntable backboard, sextuple mesh
Mark star turntable, the movement portion of sextuple tracking star turntable interferes cable；
The high-frequency radio frequency cut cable of target satellite turntable backboard is connected with the signal processing unit of radar simulator, radiofrequency signal
It exports after signal processing unit is modulated to the horn mouth on target satellite turntable；
Horn mouth on target satellite turntable generates feedback signal and is sent by high frequency cable to tracking star turntable according to radiofrequency signal
On pointing radar, wherein the trunnion axis of target satellite turntable makes horn mouth polarity on target satellite turntable and pointing radar one
It causes.
9. a kind of distributed broadband microwave target simulator according to claim 8, it is characterised in that: further include at signal
Unit host computer is managed, signal processing unit host computer generates modulation letter input, so that radar simulator signal processing unit
The relative distance of two stars, relative velocity can be modulated into the radiofrequency signal issued by radar.
10. a kind of distributed broadband microwave target simulator design method according to claim 8, it is characterised in that: also
Including dynamics simulation computer, dynamics simulation computer controls sextuple target satellite turntable, 6 DOF.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110861791A (en) * | 2019-11-07 | 2020-03-06 | 上海航天控制技术研究所 | Rotating target super-short-range relative navigation ground closed-loop test method |
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Application publication date: 20190910 |