CN107310755B - Adaptive laser racemization method for space junk - Google Patents
Adaptive laser racemization method for space junk Download PDFInfo
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- CN107310755B CN107310755B CN201710544639.XA CN201710544639A CN107310755B CN 107310755 B CN107310755 B CN 107310755B CN 201710544639 A CN201710544639 A CN 201710544639A CN 107310755 B CN107310755 B CN 107310755B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G4/00—Tools specially adapted for use in space
Abstract
The invention discloses a kind of adaptive laser racemization methods for space junk.This method is realized in adaptive laser racemization system.This method include fragment tracking, focusing in real time, fragment reduction of speed and racemization, translation reduction of speed assess in real time, adaptively translation reduction of speed, racemization assess in real time, seven steps of adaptive racemization.Fragment tracking realizes chip distribution analysis and determines interest fragment target；Fragment reduction of speed and racemization are carried out on the basis of auto-focusing；The adaptive translation reduction of speed of progress is assessed in real time based on translation reduction of speed；Adaptive racemization is carried out on the basis of assessing in real time based on racemization.The invention has the advantages that carrying out space junk distribution analysis in real time using picture charge pattern subsystem, and select interest fragment target；Using variable power repetition pulse LID laser and speed measured subsystem, LID effect monitoring subsystem, adaptive fragment reduction of speed and racemization are realized, to reach quick fragment racemization, improve spall-catcher ability.
Description
Technical field
The present invention relates to a kind of laser racemization System and method for, more particularly to it is a kind of using recombination laser and imaging means
Target racemization method belongs to field of photoelectric technology suitable for the racemization of Low Earth Orbit fragment.
Background technique
Space junk (Space debris) is collectively referred to as by the collection that failure object forms on Earth's orbit, also referred to as track is broken
Piece, space trash or space waste.There are 1500 large sizes are broken in Low Earth Orbit (Low Earth orbit, abbreviation LEO)
Piece (each quality is all larger than double centner), the quality summation 1900 that gross mass accounts for entire low rail fragment ram the loose soil with a stone-roller after sowing 98%.
Each satellite launch, space exploration and manned space flight may produce leaving space fragment.It is any that there is certain size
Two spaces object such as collide and will all generate new fragment.Especially when big collision (such as a space station and a certain mistake
Imitate satellite) when occurring, a large amount of fragments generated would potentially result in LEO and can not continue to use.
The orbit perturbation that space junk generates can change the aspect of orbit plane, so that collision may be sent out from any direction
It is raw.Fragment often results in high velocity impact, and speed is up to every number of seconds kilometer.It is out of control low and under the effect of space perturbative force
Rail fragment is in high speed rotation state mostly, and there are long-term nutatings for rotary shaft.This results in the relative measurement of fragment target, approaches
It faces big challenge with arresting.Therefore, for fragment target application act on, by its angular velocity of rotation reduce an order of magnitude with
On, that is, realize that significantly racemization is to implement the premise of the tasks such as close fragment, observation, capture.
Currently, international space fragment the relevant technologies include ion beam, it is aerogel foam ball, spray water, aerating ballon, electronic
Tether accelerates electric gluing method etc., these the relevant technologies have the shortcomings that at high cost, volume is big, robustness is low, is badly in need of novel broken
Chip technology is overcome.Induced with laser racemization (Laser induced derotation, abbreviation LID) is a kind of sharp based on low energy
Optical pressure mechanism and superlaser induced plasma (Laser induced plasma, abbreviation LIP) ablation of light photon momentum
The technology of plasma thrust mechanism is formed, therefore, the moment of resistance needed for LID can provide fragment racemization is one kind of fragment racemization
Feasible method.But not yet release mature LID racemization system and method.
For traditional space-based fragment technical deficiency, the present invention proposes a kind of adaptive space-based of picture control double-pulse laser
LID fragment method, has the advantages that high robust, the fragment racemization suitable for various sizes and revolving speed.
Summary of the invention
The purpose of the present invention is to provide a kind of adaptive laser racemization System and method fors of Low Earth Orbit space junk, high
Robustness can effectively expand the size velocity interval for being applicable in fragment, meet the requirement of subsequent spall-catcher.
The present invention is achieved like this:
Adaptive laser racemization system proposed by the present invention is made of electrical turntable and fuselage main body, is contained in fuselage main body
Picture charge pattern subsystem, follow-up analysis subsystem, ranging and range rate Laser emission subsystem, echo reception subsystem, LID subsystem
System, LID effect monitoring analyzing subsystem, adapted local cosine transform subsystem and main control analyzer；
The instruction tape that wherein electrical turntable is subjected to main control analyzer moves fuselage main body work three-dimensional and rotates at any angle；
Picture charge pattern subsystem is made of wide-angle lens and imaging detector；Follow-up analysis subsystem by imaging controller with
Imaging analysis device composition；Imaging controller and imaging detector are communicated by signal wire, and imaging controller is to start and control
The imaging of imaging detector, and receive its image data；Imaging analysis device is by high speed GPU (note: Graphics Processing
Unit, graphics processing unit) composition, to carry out high speed analysis in real time to image；
It realizes and racemization is carried out to space junk, fragment tracking is the first step.Picture charge pattern subsystem is using photograph in real time
Method fragment is tracked, obtain the distribution of fragment in imaging viewing field, and analyzed in real time by imaging analysis device, look for
It to space interest fragment target and approaches, its image is analyzed in real time again, obtains its geometrical characteristic and kinematics characteristic, with
For LID subsystem high efficiency racemization；
LID subsystem is made of LID laser, optical power amplifier, beam expanding lens；LID effect monitoring analyzing subsystem by
CCD planar array detector and LID image dissector composition；The nanosecond Gao Zhongying high energy laser that LID laser issues is through light function
Rate amplifier carries out power amplification, then expands through beam expanding lens, then persistently strikes space interest fragment mesh by cassette telescope
Mark provides it constant resistance and the moment of resistance, carries out reduction of speed and racemization；
Ranging and range rate Laser emission subsystem is expanded by ranging and range rate laser, waveform and phase-modulator, ranging and range rate
Microscope group at；
Echo reception subsystem is made of PIN photodiode, ranging and range rate demodulator circuit；
The continuous laser that ranging and range rate laser issues is expanded after waveform and phase modulator modulation by ranging and range rate
Mirror expands, then by cassette telescope irradiate space interest fragment target, echo pass through cassette telescope after by PIN photoelectricity two
Pole pipe sensing is converted into electric signal, then after the demodulation of ranging and range rate demodulator circuit, is calculated based on phase method and Doppler effect
To the distance and velocity information of space interest fragment target, can the effect to laser reduction of speed assessed in real time；
LID effect monitoring analyzing subsystem is made of CCD planar array detector and LID image dissector；Space interest fragment
Target is imaged on CCD planar array detector by cassette telescope, then is carried out image procossing by LID image dissector and divided
Analysis, assesses the effect of racemization in real time；
Adapted local cosine transform subsystem is made of cassette telescope and secondary mirror controller；Cassette telescope is by secondary mirror, primary mirror group
At primary mirror is provided with centre bore；Secondary mirror controller can drive secondary mirror to translate along primary optical axis, realize zoom and focusing；
Main control analyzer can carry out switch control to LID laser, ranging and range rate laser；Controllable LID laser
The energy of output laser pulse and repetition；Command displacement instruction is sent to secondary mirror controller；To start imaging analysis device, ranging
Test the speed demodulator circuit and LID image dissector, and receives their analysis result；
There are five optical axises altogether for adaptive laser racemization system: primary optical axis, ranging and range rate receive optical axis, effect monitoring optical axis,
Ranging and range rate optical axis and picture charge pattern optical axis, this five optical axises are generally aligned in the same plane, and primary optical axis, picture charge pattern optical axis, effect
Monitoring optical axis three is parallel to each other, and ranging and range rate receives optical axis and is parallel to each other with ranging and range rate optical axis, primary optical axis and ranging and range rate
Optical axis is vertical；
Adaptive laser racemization system proposed by the present invention carries out the racemization of space junk according to the following steps:
(1) fragment is tracked
Main control analyzer issues instruction starting imaging analysis device, and imaging analysis device starts imaging by imaging controller and visits
Device is surveyed, imaging detector obtains the space junk distributed image in wide-angle lens field range, and is passed through imaging controller
It send to imaging analysis device and carries out high speed analysis in real time；Imaging analysis device isolates space interest fragment target from image, in real time
Angular deviation of its center from primary optical axis is calculated, and the angu-lar deviation is transmitted to main control analyzer；Main control analyzer
After receiving the angu-lar deviation, issue control instruction to electrical turntable, electrical turntable drive fuselage main body go to primary optical axis with
The intersection of space interest fragment target's center；
(2) focusing in real time
Main control analyzer sends control instruction to secondary mirror controller and secondary mirror is driven constantly to translate along primary optical axis, at this point, empty
Between interest fragment target visible light radiation along primary optical axis pass sequentially through primary mirror, secondary mirror reflection, pass through centre bore, it is anti-through Multicolour mirror
It penetrates, then after light splitting piece reflects, goes to effect monitoring optical axis, received by CCD planar array detector, form space interest fragment target
Visible images；Main control analyzer starting LID image dissector analyzes the image in real time, calculates the high-frequency information of image, directly
It is at this time focusing state to high fdrequency component maximum, main control analyzer sends to secondary mirror controller and instructs, and stops the shifting of secondary mirror
It is dynamic；
(3) fragment reduction of speed and racemization
Main control analyzer issues instruction starting LID laser, issues pulse laser by the pulse energy of default and repetition,
Power amplification is carried out through optical power amplifier, is then expanded through beam expanding lens, sequentially passes through dichroic mirror, polychrome along key light axis direction
After mirror, centre bore, after secondary mirror reflection, primary mirror reflection, position is focused to, laser pulse, which is persistently hit, provides resistance and resistance
Square plays the role of deceleration and racemization；
(4) translation reduction of speed is assessed in real time
Position is overlapped with space interest fragment target's center at this time, and the resistance arm of laser pulse is 0；LID laser at this time
Pulse only provides drag braking fragment, and while striking progress, the translation reduction of speed for carrying out racemization effect is assessed in real time, main control
Analyzer issues instruction starting ranging and range rate laser, and the continuous laser that ranging and range rate laser issues is through waveform and phase-modulation
It is expanded after device modulation by ranging and range rate beam expanding lens, is transmitted along ranging and range rate optical axis, passed through through dichroic mirror transmitting, along primary optical axis more
After Look mirror, centre bore, after secondary mirror reflection, primary mirror reflection, position is focused to, echo-signal is successively led to along backpropagation
Primary mirror, secondary mirror reflection are crossed, centre bore is passed through, is reflected through Multicolour mirror, after being then passed through light splitting piece, optical axis is received along ranging and range rate and passes
It is defeated, electric signal is converted by PIN photodiode sensing, then after the demodulation of ranging and range rate demodulator circuit, based on phase method and more
General Le calculation of effect obtains the distance of space interest fragment target and the real-time translational velocity information along primary optical axis；
(5) be adaptively translatable reduction of speed
Main control analyzer issues the pulse energy and repetition of instruction adaptively changing LID laser, and principle is that reduction of speed is fast,
It is appropriate to reduce energy and repetition；Reduction of speed is slow, then suitably increases energy and repetition, constantly progress step (2) to (4), until space
The real-time translational velocity of interest fragment target is reduced to zero；
(6) racemization is assessed in real time
Space interest fragment target translational velocity is reduced to after zero, is only left Fixed-point Motion of A speed, at this point, space interest is broken
The radiation of piece target visible light passes sequentially through primary mirror, secondary mirror reflection along primary optical axis, passes through centre bore, reflects through Multicolour mirror, then through dividing
After mating plate reflection, effect monitoring optical axis is gone to, the visible images to be formed are received by CCD planar array detector, by LID image analysis
Device is analyzed in real time, is analyzed by the image sequence of different moments, can be calculated space interest fragment target and rotate speed in real time
Degree and in real time maximum resistance arm position；
(7) adaptive racemization
Main control analyzer issues instructions to electrical turntable, and it is emerging with space that electrical turntable drives fuselage main body to go to primary optical axis
The interesting real-time maximum resistance arm position of fragment target is overlapped；Step (2) and step (6) are repeated, until space junk target is determined
Point velocity of rotation is 0, and space interest fragment target is zero relative to the speed of adaptive laser racemization system at this time；It can be by fragment
Capture device easily captures.
The invention has the advantages that a kind of adaptive laser racemization System and method for is provided, using picture charge pattern
System carries out space junk distribution analysis in real time, and selects interest fragment target；Using variable power repetition pulse LID laser
With speed measured subsystem, LID effect monitoring subsystem, adaptive fragment reduction of speed and racemization are realized, to reach quickly broken
Piece racemization improves spall-catcher ability.
Detailed description of the invention
Fig. 1 is present system structural schematic diagram, in figure: 1 --- space interest fragment target；2 --- position；
3 --- secondary mirror；4 --- cassette telescope；5 --- picture charge pattern subsystem；6 --- follow-up analysis subsystem；7 --- echo connects
Receive subsystem；8 --- light splitting piece；9 --- CCD planar array detector；10 --- LID effect monitoring analyzing subsystem；11 --- it is main
Control analyzer；12 --- LID subsystem；13 --- LID laser；14 --- optical power amplifier；15 --- beam expanding lens；
16 --- primary mirror；17 --- primary optical axis；18 --- ranging and range rate receives optical axis；19 --- effect monitoring optical axis；20 --- it is double-colored
Mirror；21 --- ranging and range rate Laser emission subsystem；22 --- ranging and range rate laser；23 --- waveform and phase-modulator；
24 --- ranging and range rate beam expanding lens；25 --- ranging and range rate optical axis；26 --- Multicolour mirror；27 --- centre bore；28 --- secondary mirror
Controller；29 --- adapted local cosine transform subsystem；30 --- picture charge pattern optical axis；31 --- wide-angle lens；32 --- imaging is visited
Survey device；33 --- signal wire；34 --- imaging controller；35 --- imaging analysis device；36 --- electrical turntable；37 --- fuselage
Main body；38 --- PIN photodiode；39 --- ranging and range rate demodulator circuit；40 --- LID image dissector.
Note: CCD, charge-coupled device；PIN, i.e., between the PN junction or semiconductor and metal between two kinds of semiconductors
Knot adjacent domain, between the area P and the area N generate I type floor.
Specific embodiment
The specific embodiment of the invention is as shown in Figure 1.
Adaptive laser racemization system proposed by the present invention is made of electrical turntable 36 and fuselage main body 37, fuselage main body 37
It is interior to contain picture charge pattern subsystem 5, follow-up analysis subsystem 6, ranging and range rate Laser emission subsystem 21, echo reception subsystem
7, LID subsystem 12, LID effect monitoring analyzing subsystem 10, adapted local cosine transform subsystem 29 and main control analyzer 11；
The instruction tape that wherein electrical turntable 36 is subjected to main control analyzer 11 moves fuselage main body 37 and makees three-dimensional any angle
Rotation；
Picture charge pattern subsystem 5 is made of wide-angle lens 31 and imaging detector 32；Follow-up analysis subsystem 6 is controlled by imaging
Device 34 processed is formed with imaging analysis device 35；Imaging controller 34 is communicated with imaging detector 32 by signal wire 33, imaging control
Device 34 receives its image data to start the imaging with control imaging detector 32；Imaging analysis device 35 is by high speed GPU
(note: Graphics Processing Unit, graphics processing unit) composition, to carry out high speed analysis in real time to image；
It realizes and racemization is carried out to space junk, fragment tracking is the first step.Picture charge pattern subsystem 5 is using photograph in real time
Method fragment is tracked, obtain the distribution of fragment in imaging viewing field, and analyzed in real time by imaging analysis device 35,
It finds space interest fragment target 1 and approaches, its image is analyzed in real time again, show that its geometrical characteristic and kinematics are special
Property, for the 12 high efficiency racemization of LID subsystem；
LID subsystem 12 is made of LID laser 13, optical power amplifier 14, beam expanding lens 15；The analysis of LID effect monitoring
Subsystem 10 is made of CCD planar array detector 9 and LID image dissector 40；The 1064nm wavelength that LID laser 13 issues is received
Second grade Gao Zhongying high energy laser carries out power amplification through optical power amplifier 14, then expands through beam expanding lens 14, then pass through card
Formula telescope 4 persistently strikes space interest fragment target 1, provides it constant resistance and the moment of resistance, carries out reduction of speed and racemization；
Ranging and range rate Laser emission subsystem 21 is surveyed by ranging and range rate laser 22, waveform and phase-modulator 23, ranging
Fast beam expanding lens 24 forms；
Echo reception subsystem 7 is made of PIN photodiode 38, ranging and range rate demodulator circuit 39；
The 1550nm continuous laser that ranging and range rate laser 22 issues passes through survey after waveform and phase-modulator 23 are modulated
Away from testing the speed, beam expanding lens 24 is expanded, then irradiates space interest fragment target 1 by cassette telescope 4, and echo is looked in the distance by cassette
Electric signal is converted by the sensing of PIN photodiode 38 after mirror 4, then after the demodulation of ranging and range rate demodulator circuit 39, is based on phase
The distance and velocity information of space interest fragment target 1 is calculated in method and Doppler effect, can effect to laser reduction of speed into
Row assessment in real time；
LID effect monitoring analyzing subsystem 10 is made of CCD planar array detector 9 and LID image dissector 40；Space interest
Fragment target 1 is imaged on CCD planar array detector 9 by cassette telescope 4, then carries out image by LID image dissector 40
Processing and analysis, assess the effect of racemization in real time；
Adapted local cosine transform subsystem 29 is made of cassette telescope 4 and secondary mirror controller 28；Cassette telescope 4 by secondary mirror 3,
Primary mirror 16 forms, and primary mirror 16 is provided with centre bore 27；Secondary mirror controller 28 can drive secondary mirror 3 to translate along primary optical axis 17, realize zoom
And focusing；
Main control analyzer 11 can carry out switch control to LID laser 13, ranging and range rate laser 22；Controllable LID
The energy of 13 output laser pulse of laser and repetition；Command displacement instruction is sent to secondary mirror controller 28；To start imaging
Analyzer 35, ranging and range rate demodulator circuit 39 and LID image dissector 40, and receive their analysis result；
There are five optical axises altogether for adaptive laser racemization system: primary optical axis 17, ranging and range rate receive optical axis 18, effect monitoring light
Axis 19, ranging and range rate optical axis 25 and picture charge pattern optical axis 30, this five optical axises are generally aligned in the same plane, and primary optical axis 17, image chase after
Track optical axis 30,19 three of effect monitoring optical axis are parallel to each other, and ranging and range rate receives optical axis 18 and ranging and range rate optical axis 25 is mutually flat
Row, primary optical axis 17 are vertical with ranging and range rate optical axis 25；
Adaptive laser racemization system proposed by the present invention carries out the racemization of space junk according to the following steps:
(1) fragment is tracked
Main control analyzer 11 issues instruction starting imaging analysis device 35, and imaging analysis device 35 is opened by imaging controller 34
Dynamic imaging detector 32, imaging detector 32 obtain the space junk distributed image in 31 field range of wide-angle lens, and by its
It is sent by imaging controller 34 to imaging analysis device 35 and carries out high speed analysis in real time；Imaging analysis device 35 isolates sky from image
Between interest fragment target 1, calculate angular deviation of its center from primary optical axis 17 in real time, and the angu-lar deviation is transmitted to master control
Analyzer 11 processed；After main control analyzer 11 receives the angu-lar deviation, control instruction is issued to electrical turntable 36, electric rotating
The drive of platform 36 fuselage main body 37 goes to primary optical axis 17 and intersects with 1 center of space interest fragment target；
(2) focusing in real time
Main control analyzer 11 sends control instruction to secondary mirror controller 28 and secondary mirror 3 is driven constantly to translate along primary optical axis 17,
At this point, interest fragment target 1 visible optical radiation in space passes sequentially through primary mirror 16 along primary optical axis 17, secondary mirror 3 reflects, centre bore is passed through
27, it is reflected through Multicolour mirror 26, then after the reflection of light splitting piece 8, go to effect monitoring optical axis 19, received by CCD planar array detector 9,
Form 1 visible images of space interest fragment target；Main control analyzer 11 starts LID image dissector 40 and analyzes the figure in real time
Picture calculates the high-frequency information of image, until high fdrequency component is maximum, it is at this time focusing state, main control analyzer 11 gives secondary mirror control
Device 28 processed sends instruction, stops the movement of secondary mirror；
(3) fragment reduction of speed and racemization
Main control analyzer 11 issues instruction starting LID laser 13, issues pulse by the pulse energy of default and repetition
Laser carries out power amplification through optical power amplifier 14, then expands through beam expanding lens 15, sequentially passes through along 17 direction of primary optical axis double
After Look mirror 20, Multicolour mirror 26, centre bore 27, after the reflection of secondary mirror 3, primary mirror 16 reflect, position 2 is focused to, laser pulse is held
Continuous strike provides resistance and the moment of resistance, plays the role of deceleration and racemization；
(4) translation reduction of speed is assessed in real time
Position 2 is overlapped with 1 center of space interest fragment target at this time, and the resistance arm of laser pulse is 0；LID swashs at this time
Light pulse only provides drag braking fragment, and while striking progress, the translation reduction of speed for carrying out racemization effect is assessed in real time, master control
Analyzer 11 processed issues instruction starting ranging and range rate laser 22, the 1550nm continuous laser warp that ranging and range rate laser 22 issues
Waveform and phase-modulator 23 are expanded after modulating by ranging and range rate beam expanding lens 24, are transmitted along ranging and range rate optical axis 25, through double-colored
The transmitting of mirror 20 passes through Multicolour mirror 26 along primary optical axis 17, after centre bore 27, after the reflection of secondary mirror 3, primary mirror 16 reflect, focuses to work
With point 2, echo-signal passes sequentially through primary mirror 16, the reflection of secondary mirror 3, passes through centre bore 27 along backpropagation, anti-through Multicolour mirror 26
It penetrates, after being then passed through light splitting piece 8, receives optical axis 18 along ranging and range rate and transmit, telecommunications is converted by the sensing of PIN photodiode 38
Number, then after the demodulation of ranging and range rate demodulator circuit 39, space interest fragment mesh is calculated based on phase method and Doppler effect
The distance and real-time translational velocity information along primary optical axis 17 of mark 1；
(5) be adaptively translatable reduction of speed
Main control analyzer 11 issues the pulse energy and repetition of instruction adaptively changing LID laser 13, and principle is drop
It is fast fast, it is appropriate to reduce energy and repetition；Reduction of speed is slow, then suitably increases energy and repetition, constantly progress step (2) to (4), until
The real-time translational velocity of space interest fragment target 1 is reduced to zero；
(6) racemization is assessed in real time
Interest fragment target 1 translational velocity in space is reduced to after zero, is only left Fixed-point Motion of A speed, at this point, space interest
1 visible optical radiation of fragment target passes sequentially through primary mirror 16 along primary optical axis 17, secondary mirror 3 reflects, and centre bore 27 is passed through, through Multicolour mirror 26
Reflection, then after the reflection of light splitting piece 8, effect monitoring optical axis 19 is gone to, the visible light figure formed is received by CCD planar array detector 9
Picture is analyzed in real time by LID image dissector 40, is analyzed by the image sequence of different moments, can be calculated space interest
The real-time velocity of rotation of fragment target 1 and real-time maximum resistance arm position；
(7) adaptive racemization
Main control analyzer 11 issues instructions to electrical turntable 36, and electrical turntable 36 drives fuselage main body 37 to go to primary optical axis
17 are overlapped with the real-time maximum resistance arm position of space interest fragment target 1；Step (2) and step (6) are repeated, until space is broken
The Fixed-point Motion of A speed of piece target 1 is 0, at this time speed of the space interest fragment target 1 relative to adaptive laser racemization system
It is zero；It can easily be captured by spall-catcher device.
Claims (1)
1. a kind of adaptive laser racemization method for space junk, which is in one kind for sky
Between fragment adaptive laser racemization system on realize, the adaptive laser racemization system for space junk is by scheming
As tracing subsystem (5), follow-up analysis subsystem (6), ranging and range rate Laser emission subsystem (21), echo reception subsystem
(7), LID subsystem (12), LID effect monitoring analyzing subsystem (10), adapted local cosine transform subsystem (29) and main control analysis
Device (11) composition, it is characterised in that adaptive laser racemization method the following steps are included:
1) fragment is tracked
Main control analyzer issues instruction starting imaging analysis device, and imaging analysis device starts imaging detection by imaging controller
Device, imaging detector obtains the space junk distributed image in wide-angle lens field range, and it is sent by imaging controller
High speed analysis in real time is carried out to imaging analysis device；Imaging analysis device isolates space interest fragment target from image, counts in real time
Angular deviation of its center from primary optical axis is calculated, and the angu-lar deviation is transmitted to main control analyzer；Main control analyzer connects
After receiving the angu-lar deviation, control instruction is issued to electrical turntable, electrical turntable drives fuselage main body to go to primary optical axis and sky
Between interest fragment target's center intersect；
2) focusing in real time
Main control analyzer sends control instruction to secondary mirror controller and secondary mirror is driven constantly to translate along primary optical axis, at this point, space is emerging
Interesting fragment target visible light radiation passes sequentially through primary mirror, secondary mirror reflection along primary optical axis, passes through centre bore, reflects through Multicolour mirror, then
After light splitting piece reflects, effect monitoring optical axis is gone to, is received by CCD planar array detector, it is visible to form space interest fragment target
Light image；Main control analyzer starting LID image dissector analyzes the image in real time, calculates the high-frequency information of image, until high
Frequency component is maximum, is at this time focusing state, and main control analyzer sends to secondary mirror controller and instructs, and stops the movement of secondary mirror；
3) fragment reduction of speed and racemization
Main control analyzer issues instruction starting LID laser, pulse laser is issued by the pulse energy of default and repetition, through light
Power amplifier carry out power amplification, then expanded through beam expanding lens, along key light axis direction sequentially pass through dichroic mirror, Multicolour mirror, in
Behind heart hole, after secondary mirror reflection, primary mirror reflection, position is focused to, laser pulse, which is persistently hit, provides resistance and the moment of resistance, rises
To the effect slowed down with racemization；
4) translation reduction of speed is assessed in real time
Position is overlapped with space interest fragment target's center at this time, and the resistance arm of laser pulse is 0；LID laser pulse at this time
Drag braking fragment is only provided, while striking progress, the translation reduction of speed for carrying out racemization effect is assessed in real time, main control analysis
Device issues instruction starting ranging and range rate laser, and the continuous laser that ranging and range rate laser issues is through waveform and phase-modulator tune
It is expanded after system by ranging and range rate beam expanding lens, is transmitted along ranging and range rate optical axis, pass through polychrome through dichroic mirror transmitting, along primary optical axis
After mirror, centre bore, after secondary mirror reflection, primary mirror reflection, position is focused to, echo-signal is passed sequentially through along backpropagation
Primary mirror, secondary mirror reflection, pass through centre bore, reflect through Multicolour mirror, after being then passed through light splitting piece, receive optical axis transmission along ranging and range rate,
Electric signal is converted by PIN photodiode sensing, then after the demodulation of ranging and range rate demodulator circuit, is based on phase method and Doppler
Calculation of effect obtains the distance of space interest fragment target and the real-time translational velocity information along primary optical axis；
5) be adaptively translatable reduction of speed
Main control analyzer issues the pulse energy and repetition of instruction adaptively changing LID laser, and principle is that reduction of speed is fast, suitably
Reduce energy and repetition；Reduction of speed is slow, then suitably increases energy and repetition, constantly carries out step 2) to 4), until space interest is broken
The real-time translational velocity of piece target is reduced to zero；
6) racemization is assessed in real time
Space interest fragment target translational velocity is reduced to after zero, is only left Fixed-point Motion of A speed, at this point, space interest fragment mesh
Mark visible optical radiation passes sequentially through primary mirror, secondary mirror reflection along primary optical axis, passes through centre bore, reflects through Multicolour mirror, then through light splitting piece
After reflection, go to effect monitoring optical axis, the visible images to be formed received by CCD planar array detector, by LID image dissector into
Row analysis in real time, is analyzed by the image sequences of different moments, can calculate the real-time velocity of rotation of space interest fragment target and
Real-time maximum resistance arm position；
7) adaptive racemization
Main control analyzer issues instructions to electrical turntable, and electrical turntable drive fuselage main body goes to primary optical axis and space interest is broken
The real-time maximum resistance arm position of piece target is overlapped；Step 2) and step 6) are repeated, until the Fixed-point Motion of A of space junk target
Speed is 0, and space interest fragment target is zero relative to the speed of adaptive laser racemization system at this time；It can be filled by spall-catcher
It sets and easily captures.
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| CN108021765B (en) * | 2017-12-18 | 2021-03-02 | 北京卫星环境工程研究所 | Method for calculating mechanical behavior of irregular three-dimensional target driven by laser ablation |
| CN108357697B (en) * | 2018-01-12 | 2019-11-08 | 合肥凯石投资咨询有限公司 | A kind of space trash laser cleaning system |
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