CN101207440B - Capture performance test method of space optical communication system - Google Patents
Capture performance test method of space optical communication system Download PDFInfo
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- CN101207440B CN101207440B CN 200710144870 CN200710144870A CN101207440B CN 101207440 B CN101207440 B CN 101207440B CN 200710144870 CN200710144870 CN 200710144870 CN 200710144870 A CN200710144870 A CN 200710144870A CN 101207440 B CN101207440 B CN 101207440B
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- scanning
- acquisition
- beacon beam
- terminal
- signal receiving
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Abstract
The invention provides an acquisition performance testing method of a space optical communication system. The invention relates to an improvement on a test and optimization method of the space optical communication acquisition performance, and aims to solve the problems that the prior space optical communication acquisition method is simplex in the acquisition performance testing method, is not provided with integrated terminal acquiring function, and cannot implement contrast optimizing analysis on multifold parameters and strategies. The method of the invention consists of the following steps: step 1 is realized by setting the initial states of two satellites which need links; step 2 is realized by presetting the relative positions and stances of the two satellites which need links in a main control device; step 3 is realized by matching the test equipment with the terminal to be tested for conducting test; step 4 is realized by establishing the initial acquisition state by coarse sighting; step 5 is realized by setting the combination form of the acquisition strategy, the scan method, the beam divergence angle, the detection horizon, and the detection frame rate; step 7 is realized by analyzing and comparing the test results, and selecting out the optimal acquisition strategy and acquisition parameter setting.
Description
Technical field
The present invention relates to a kind of to the test of space optical communication acquisition performance and the improvement of optimization method.
Background technology
The beam-capturing performance is one of key technical index of space optical communication terminal, existing method of testing is: LASER Light Source and imaging optical system analog capture beacon beam are set and catch pick-up probe, the unit performance test of in the laboratory, catching, publication number is that the patent of invention of CN101072072 discloses a kind of space optical communication terminal scanning acquisition performance method of testing, but there is following shortcoming in this method:
(1), be subjected to the restriction of analogue means characteristic, can only test the acquisition performance of terminal at collimated light beam and specific angle of visual field situation, and acquisition probability and catch less stable;
(2), do not possess the complete termination function of catching, can't cooperate with dut terminal and system's pointer test such as carry out two-wayly catching, subregion is caught, dynamically catch;
(3), can't test and catch beacon beam beam spreading angle, when catching ken variation, scan mode and control algolithm the contrast optimization of the influence of catching and strategy analyzed.
Summary of the invention
The present invention is can only the acquisition performance of terminal being tested at collimated light beam and specific angle of visual field situation that the catching method that solves the existing space optical communication exists, acquisition probability and catch less stable, do not possess the problem that the contrast optimization of complete catching termination function, can't carry out multiple parameter and strategy is analyzed provides a kind of capture performance test method of space optical communication system.Method of the present invention is realized by following steps:
Step 1., set the relative position and the attitude of two satellites needing link;
Step 2., 1. the relative position and the attitude of middle two satellites that need link of setting are preset in the master control set 4 with step;
Step 3., all be fixed on the two-dimentional turntable 1 rotation axis of signal receiving device 2 and sender unit 3 to change the angle of optical axis with it, and the optical axis of signal receiving device 2 and sender unit 3 is parallel to each other, three input/output terminals of master control set 4 are connected with two-dimentional turntable 1, signal receiving device 2 and the input/output terminal of sender unit 3 respectively, two-dimentional turntable 1, signal receiving device 2, sender unit 3 and the master control set 4 common testing equipment M that form;
Step 4., rotate by the two-dimentional turntable 1 of master control set 4 control, the beacon beam of 2 pairs of dut terminal N emissions of signal receiving device is scanned, when capturing the beacon beam of dut terminal N emission, signal receiving device 2 stops scanning, and by sender unit 3 to dut terminal N emission beacon beam, set up the initial acquisition state;
Step 5., set the beam divergence angle of multiple scan capture mode, beacon beam respectively and survey the ken and survey the compound mode of frame frequency according to the scanning principle that no-raster is caught, simple scanning is caught catches with bilateral scanning on master control set 4;
Step 6., the scanning 5. set according to step passes master control set 4 control signal receiving systems 2 and sender unit 3 in principle and carry out repeatedly beacon beam and catch test and logging test results;
Step 7., according to preset under the acquisition probability requirement capture time and to the principle of the adaptedness of satellite platform, the test result that 6. step obtains is carried out the combination and the selection of harvesting policy, terminal parameter, the analysis of the acquisition performance of final realization terminal and chain-circuit system relatively, according to acquisition probability and capture time test result, select optimal, capture strategy and the setting of catching parameter.
The invention has the beneficial effects as follows: can test acquisition probability and capture time under the multiple satellite platform control precision, can test and catch beacon beam beam spreading angle, influence to catching when catching ken variation, scan mode and control algolithm; Can test the acquisition performance of terminal polytype light beam and angle of visual field situation; Can cooperate with dut terminal and system's pointer test such as carry out two-wayly catching, subregion is caught, dynamically catch; Can carry out the contrast optimization of multiple parameter and strategy analyzes.
Description of drawings
Fig. 1 is a structural representation of finishing the device of the inventive method.
Embodiment
Embodiment one: referring to Fig. 1, present embodiment is realized by following steps:
Step 1., set the relative position and the attitude of two satellites needing link;
Step 2., 1. the relative position and the attitude of middle two satellites that need link of setting are preset in the master control set 4 with step;
Step 3., all be fixed on the two-dimentional turntable 1 rotation axis of signal receiving device 2 and sender unit 3 to change the angle of optical axis with it, and the optical axis of signal receiving device 2 and sender unit 3 is parallel to each other, three input/output terminals of master control set 4 are connected with two-dimentional turntable 1, signal receiving device 2 and the input/output terminal of sender unit 3 respectively, two-dimentional turntable 1, signal receiving device 2, sender unit 3 and the master control set 4 common testing equipment M that form;
Step 4., rotate by the two-dimentional turntable 1 of master control set 4 control, the beacon beam of 2 pairs of dut terminal N emissions of signal receiving device is scanned, when capturing the beacon beam of dut terminal N emission, signal receiving device 2 stops scanning, and by sender unit 3 to dut terminal N emission beacon beam, set up the initial acquisition state;
Step 5., set the beam divergence angle of multiple scan capture mode, beacon beam respectively and survey the ken and survey the compound mode of frame frequency according to the scanning principle that no-raster is caught, simple scanning is caught catches with bilateral scanning on master control set 4;
Step 6., the scanning 5. set according to step passes master control set 4 control signal receiving systems 2 and sender unit 3 in principle and carry out repeatedly beacon beam and catch test and logging test results;
Step 7., according to preset under the acquisition probability requirement capture time and to the principle of the adaptedness of satellite platform, the test result that 6. step obtains is carried out the combination and the selection of harvesting policy, terminal parameter, the analysis of the acquisition performance of final realization terminal and chain-circuit system relatively, according to acquisition probability and capture time test result, select optimal, capture strategy and the setting of catching parameter.
Described two-dimentional turntable 1 can adopt MS650 absolute type code-disc and torque motor to realize, described signal receiving device 2 is made up of optical antenna, imaging optical path and imaging detector, optical antenna and imaging optical path are general imaging system, antenna aperture 100～300mm, imaging detector requires big planar array detector, the pixel number is greater than 1000 * 1000, surveying the ken is that 1～10mrad is adjustable, unit pixel search angle resolution is 10 μ rad, it is adjustable to survey frame frequency 20～50Hz, the 622f type CCD that can adopt German Basler company to produce; Described sender unit 3 is by optical antenna, shaping light path and laser constitution, laser is for realizing the maximum 20W high power semiconductor lasers of output continuously, the NE-C3720-F4 type laser that can adopt French Thales company to produce, optical antenna and shaping light path are for pressing the general optical system of laser output parameter design, by adjusting the laser light-emitting area, can realize that beam divergence angle is that 0.5～5mrad is adjustable in the position of optical axis direction; Described master control set 4 can adopt general circuit design method to realize, can control the rotational angle and the direction of two-dimentional turntable 1 by the two-way drive circuit, digital signal by 2 outputs of digital signal processing circuit processing signals receiving system, input current by control signal emitter 3 and in the emission light path attenuator is set is adjusted the transmitting power of sender unit 3 within the specific limits.
Catch principle: in the starting stage of link establishment, establish terminal A emission and catch beacon beam, terminal B carries out beacon beam and catches, and two terminals slightly do not aim at according to orbit parameter on satellite platform separately.Definition θ
vBe the angle of pitch, θ
hBe the azimuth, when aiming was finished, the angular direction vector of emission beacon beam and receiving telescope diaphragm normal was respectively
With
Transmitting and receiving the online angular direction vector in telescope diaphragm center is
The two terminals error of thick aiming mutually are respectively:
Be two-dimentional fixed angular offset amount, finger can be predicted the gradual random error of excursion, the factor that produces comprises appearance control (main factor), track, aiming, thermal deformation and assembling correction equal error, the sweep limits that certain acquisition probability requires its numerical values recited influence down to catch.
Be two-dimensional random angular deflection amount, the random error that the exponential quantity excursion is limited, the principal element of generation are little vibration on the star, the relative motion compensation error of scan control sum of errors two stars etc., the scanning overlapping degree setting that its numerical values recited influence is caught.
The source of error supposed is independent and with distributing, then according to central-limit theorem, in the component independence of pitching and azimuth direction and meet normal distribution.If
With
Mean square deviation on two angular direction is identical, is σ
θFor 6 σ
θThe full-shape scope, the probability that beacon beam covers or reception antenna receives is that 99.73% (normal distribution lower probability density function is at ± 3 σ
θIntegrated value in the scope).(corresponding plane angle is respectively θ according to beacon beam beam spreading angle and detector field of view angle
bAnd θ
r) difference, the acquisition mode of link establishment can have following several:
(1) no-raster is caught; If θ
bAnd θ
rAll greater than 6 σ
θ, directly finish after thick aiming finishes and catch;
(2) simple scanning is caught; If θ
bAnd θ
rIn have only one greater than 6 σ
θ, then catching beacon beam or reception antenna has an end just to scan can to satisfy the acquisition probability requirement;
(3) bilateral scanning is caught; If θ
bAnd θ
rAll less than 6 σ
θ, catch beacon beam and transmit and receive antenna and all need to scan.
Embodiment two: the difference of present embodiment and embodiment one is that the scan capture mode described in step 5. is captured as the master with bilateral scanning, other scan capture mode can be caught to simplify and be drawn by bilateral scanning, and the step that bilateral scanning is caught is as follows:
Step a, dut terminal N emission is caught beacon beam and is carried out leapfrog scanning and slightly take aim at uncertain angular region to cover, and the time interval of scanning is determined by testing equipment whole audience sweep time and link range;
Step b, for each step scanning of dut terminal N, testing equipment M carry out the whole audience fast scanning slightly take aim at uncertain angular region to cover;
Step c, judge whether testing equipment M captures the beacon beam of dut terminal N, judged result then enters steps d for being, judged result is then got back to step b for not;
Steps d, testing equipment M stop to scan and send light signal according to the angle coordinate of incident light to dut terminal N;
After step e, dut terminal N receive light signal, further adjust the angle of catching beacon beam according to the angle of incident light;
Step f, judge whether testing equipment M and dut terminal N can both receive the light signal that the other side sends, judged result is then caught the beacon beam process and is finished for being, judged result is then got back to step e for not.
Claims (2)
1. capture performance test method of space optical communication system is characterized in that method of the present invention is realized by following steps:
Step 1., set the relative position and the attitude of two satellites needing link;
Step 2., 1. the relative position and the attitude of middle two satellites that need link of setting are preset in the master control set (4) with step;
Step 3., the rotation axis of signal receiving device (2) and sender unit (3) all be fixed on two-dimentional turntable (1) go up to change the angle of optical axis with it, and the optical axis of signal receiving device (2) and sender unit (3) is parallel to each other, three input/output terminals of master control set (4) are connected with two-dimentional turntable (1), signal receiving device (2) and the input/output terminal of sender unit (3) respectively, and two-dimentional turntable (1), signal receiving device (2), sender unit (3) and master control set (4) are formed testing equipment (M) jointly;
Step 4., control two-dimentional turntable (1) by master control set (4) and rotate, signal receiving device (2) is scanned the beacon beam of dut terminal (N) emission, when capturing the beacon beam of dut terminal (N) emission, signal receiving device (2) stops scanning, and by sender unit (3) to dut terminal (N) emission beacon beam, set up the initial acquisition state;
Step 5., upward the beam divergence angle of setting multiple scan capture mode, beacon beam and survey the ken and survey the compound mode of frame frequency at master control set (4) respectively according to no-raster is caught, simple scanning is caught catches with bilateral scanning scanning principle;
Step 6., the scanning 5. set according to step passes master control set (4) control signal receiving system (2) and sender unit (3) in principle and carry out repeatedly beacon beam and catch test and logging test results;
Step 7., according to preset under the acquisition probability requirement capture time and to the principle of the adaptedness of satellite platform, the test result that 6. step obtains is carried out the combination and the selection of harvesting policy, terminal parameter, the analysis of the acquisition performance of final realization terminal and chain-circuit system relatively, according to acquisition probability and capture time test result, select optimal, capture strategy and the setting of catching parameter.
2. capture performance test method of space optical communication system according to claim 1, it is characterized in that scanning principle that 5. the 6. described step of step is set is that bilateral scanning is when catching, carry out repeatedly beacon beam by master control set (4) control signal receiving system (2) and sender unit (3) and catch test, its step is as follows:
The emission of step a, dut terminal (N) is caught beacon beam and is carried out leapfrog scanning and slightly take aim at uncertain angular region to cover, and the time interval of scanning is determined by testing equipment whole audience sweep time and link range;
Step b, for each step scanning of dut terminal (N), testing equipment (M) carry out the whole audience fast scanning slightly take aim at uncertain angular region to cover;
Step c, judge whether testing equipment (M) captures the beacon beam of dut terminal (N), and judged result then enters steps d for being, judged result is then got back to step b for not;
Steps d, testing equipment (M) stop to scan and send light signal according to the angle coordinate of incident light to dut terminal (N);
After step e, dut terminal (N) are received light signal, further adjust the angle of catching beacon beam according to the angle of incident light;
Step f, judge whether testing equipment (M) and dut terminal (N) can both receive the light signal that the other side sends, judged result is then caught the beacon beam process and is finished for being, judged result is then got back to step e for not.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710144870 CN101207440B (en) | 2007-12-19 | 2007-12-19 | Capture performance test method of space optical communication system |
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|---|---|---|---|
| CN 200710144870 CN101207440B (en) | 2007-12-19 | 2007-12-19 | Capture performance test method of space optical communication system |
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| CN101207440A CN101207440A (en) | 2008-06-25 |
| CN101207440B true CN101207440B (en) | 2011-08-31 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567721B (en) * | 2009-04-29 | 2012-03-28 | 哈尔滨工业大学 | Beam-capturing scanning method for rapidly establishing laser link between relay satellite and user satellite |
| CN103501203B (en) * | 2013-09-26 | 2015-03-18 | 北京空间飞行器总体设计部 | Laser satellite-ground communication link test system suitable for remote sensing satellite |
| CN104539350B (en) * | 2014-11-28 | 2017-05-03 | 北京大学 | Space laser communication terminal level system testing method |
| CN104793631B (en) * | 2015-02-12 | 2017-06-27 | 中国科学院光电技术研究所 | A kind of target acquistion method based on dynamic scan mode |
| CN104852762B (en) * | 2015-04-22 | 2017-06-13 | 长春理工大学 | The field test method of the air communication terminal initial error in pointing of space-to-ground laser communications |
| CN107181521B (en) * | 2017-05-26 | 2019-07-26 | 清华大学 | Inter-satellite link antenna scanning acquisition equipment and method |
| CN111769870B (en) * | 2020-05-20 | 2021-07-27 | 中国科学院西安光学精密机械研究所 | Detection device and detection method for relay light path assembly of space laser communication terminal |
| CN113507579B (en) * | 2021-08-04 | 2023-05-12 | 上海交通大学 | Inter-satellite laser link capturing method and system for space gravitational wave detection |
| CN115941035B (en) * | 2022-12-06 | 2023-06-02 | 威海激光通信先进技术研究院 | Quick calibration method for capturing view field of laser communication terminal based on two-dimensional scanning light beam |
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| US5517016A (en) * | 1994-03-31 | 1996-05-14 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Lasercom system architecture with reduced complexity |
| CN1804659A (en) * | 2006-01-16 | 2006-07-19 | 哈尔滨工业大学 | Method for capturing and tracing extended beacon for deep space optical communication |
| CN101072072A (en) * | 2007-06-15 | 2007-11-14 | 哈尔滨工业大学 | Space optical communication terminal scanning acquisition performance ground test method |
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2007
- 2007-12-19 CN CN 200710144870 patent/CN101207440B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5517016A (en) * | 1994-03-31 | 1996-05-14 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Lasercom system architecture with reduced complexity |
| CN1804659A (en) * | 2006-01-16 | 2006-07-19 | 哈尔滨工业大学 | Method for capturing and tracing extended beacon for deep space optical communication |
| CN101072072A (en) * | 2007-06-15 | 2007-11-14 | 哈尔滨工业大学 | Space optical communication terminal scanning acquisition performance ground test method |
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Effective date of registration: 20190920 Address after: Room A202-86, Room 178, Xiuyue Street, Building 20, Science and Technology Innovation City, Harbin Hi-tech Industrial Development Zone, Heilongjiang Province, 150028 Patentee after: Harbin industrial satellite laser communication Limited by Share Ltd Address before: 150001 Harbin, Nangang, West District, large straight street, No. 92 Patentee before: Harbin Institute of Technology |
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