CN107204801A - It is a kind of to measure the device and method that pointing system interference suppresses bandwidth - Google Patents
It is a kind of to measure the device and method that pointing system interference suppresses bandwidth Download PDFInfo
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- CN107204801A CN107204801A CN201710563680.1A CN201710563680A CN107204801A CN 107204801 A CN107204801 A CN 107204801A CN 201710563680 A CN201710563680 A CN 201710563680A CN 107204801 A CN107204801 A CN 107204801A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims description 5
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The device and method that pointing system interference suppresses bandwidth is measured the invention discloses a kind of.The measurement apparatus includes parallel light tube, beacon light laser, piezoelectric ceramics fast mirror, piezoelectric ceramic actuator, signal generator and pointing system to be measured composition.Test philosophy be by signal generator be sequentially generated different amplitudes, different frequency signal, driving piezoelectric ceramics fast mirror produces corresponding beacon angular interference.Tested pointing system, which tracks pointing system under the beacon beam after interference, measurement different frequency, to the rejection ability of interference magnitude, the disturbance rejection bandwidth of pointing system can be obtained through over-fitting.The present invention can measure the disturbance rejection bandwidth of pointing system, and simple and easy to apply.
Description
Technical field
The present invention relates to the measurement of tracking control system index, and in particular to a kind of pointing system interference suppresses the survey of bandwidth
Amount, available for evaluation of the pointing system to Platform Vibration rejection ability in space optical communication.
Background technology：
Need to set up accurate optical link in space optical communication, optical link can be disturbed by different factors, mainly included
The micro-vibration of relative motion and platform itself between platform.The link establishment of space optical communication is using capture, tracking, aiming
System, abbreviation pointing system, pointing system typically uses compound heavy metal framework, therefore can be to platform relative motion generation
Low frequency, a wide range of disturbance are effectively suppressed.And the micro-vibration of platform itself has the characteristics of interfering frequency is high, be influence with
Take aim at the main error source of system accuracy, thus pointing system disturbance rejection bandwidth be the system important parameter.
The method of conventional measurement disturbance rejection bandwidth has theoretical emulation mode, according to system control bandwidth reckoning side at present
Method etc., is indirect measurement, it is impossible to the actual system mode of reflection.
The content of the invention：
In order to solve technical problem present in background technology, the present invention proposes a kind of direct measurement pointing system interference suppression
The method of bandwidth processed, it is simple and easy to apply.Disturbed by the beacon angular for producing different frequency, the tracking for measuring pointing system is residual
Difference, the AF panel amplitude curve for obtaining pointing system is fitted by data.
As shown in Figure 1, including parallel light tube 1, beacon light laser 2, piezoelectric ceramics are quick for the test device of the present invention
Speculum 3, piezoelectric ceramic actuator 4, signal generator 5, tested pointing system 6.It is characterized in that：
The beacon light laser 2 is optical fiber laser, and fiber end face is located at the focal plane of parallel light tube 1；The beacon
The laser that light laser 2 is sent enters parallel light tube 1 after piezoelectric ceramics fast mirror 3, is produced by parallel light tube 1 parallel
Light beam, into tested pointing system 6；The signal generator 5 produces input signal to piezoelectric ceramic actuator 4, drives piezoelectricity
Ceramic fast mirror 3 carries out yaw motion.
Measure the step of pointing system interference suppresses bandwidth as follows：
1. producing the sinusoidal signal that frequency is X using signal generator 5, the driving piezoelectricity of piezoelectric ceramic actuator 4 is inputed to
It is X that ceramic fast mirror 3, which produces frequency, and amplitude is θ swing.The fiber end face of beacon light laser 2 is apart from piezoelectric ceramics
The distance of the minute surface of fast mirror 3 is L, and the focal plane of parallel light tube is f, then can produce frequency for X, and amplitude is 2L θ/f beacon
Angular is disturbed；
2. the beacon beam that the tracking step 1 of pointing system 6 to be measured is produced, system tracking residual error now is also sinusoidal signal,
The corresponding angular amplitude of residual error is θ '.Then show that pointing system is D=θ ' f/ (2L to the rejection ability of interference when frequency is X
θ)；
3. increase the interfering frequency X in step 1 successively since low frequency, 6 pairs of pointing system to be measured under measurement different frequency
The rejection ability D (X) of interference, carries out the fitting of data, as D (X0During)=0, X0The AF panel band of pointing system 6 as to be measured
It is wide.
The method have the advantages that：
1. producing interference signal using piezoelectric ceramics fast mirror, the frequency range of covering is big, and measurement accuracy is high；
2. the disturbance rejection bandwidth for obtaining pointing system can not only be measured, from low to high complete can also be obtained
AF panel curve, the test to system is more abundant.
Brief description of the drawings：
Fig. 1 is test system schematic diagram.1. parallel light tube in figure, 2. beacon light lasers, 3. piezoelectric ceramics quick reflexes
Mirror, 4. piezoelectric ceramic actuators, 5. signal generators, 6. tested pointing systems.
Fig. 2 is suppression curve of the pointing system to interference.
Embodiment：
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
Test device is constituted and connected as shown in Figure 1, and the parameter respectively constituted is described as：
1) parallel light tube 1：Focal length f=4m, bore 0.3m；
2) beacon light laser 2：Wavelength 671nm, transmission power is adjustable；
3) piezoelectric ceramics fast mirror 3：Using PI S330 series of products, maximum bias angle 10mrad；Minute surface away from
From with a distance from the fiber end face of beacon light laser 2 be L=0.1m；
4) piezoelectric ceramic actuator 4：Using the piezoelectric actuator of Harbin company's core tomorrow, closed-loop control is supported；
5) signal generator 5：Using Tyke AFG3021C models, sample rate 250M/s；
Tested pointing system 6 is placed on before test device, and specific testing procedure is：
1) signal generator 5 produces frequency for 2Hz first, and amplitude is 5V sine wave.Sinewave output is to piezoelectric ceramics
Driver 4, driving piezoelectric ceramics fast mirror 3 carries out periodic deflection, and deflection amplitude θ is 5mrad；
2) resultant interference frequency of the beacon beam after parallel light tube 1 is 2Hz, and the amplitude of interference angle is
3) it is tested pointing system 6 to be tracked beacon beam, record tracking residual error is 6.1 μ rad, therefore at 2Hz, with
It is D (2Hz)=6.1 μ rad/0.5mrad=0.012 to the rejection ability of interference to take aim at system；
4) frequency of interference is increased successively for 5Hz, 10Hz, 20Hz, 50Hz, 100Hz, 120Hz, 150Hz, 200Hz, and root
The angular amplitude of interference is suitably reduced according to the frequency of interference, measurement obtains the rejection ability that pointing system is disturbed different frequency
For：
D (5Hz)=0.031, D (10Hz)=0.071, D (20Hz)=0.132, D (50Hz)=0.389, D (100Hz)=
0.805, D (120Hz)=1.08, D (150Hz)=1.38, D (200Hz)=1.52.
Mapped to measuring obtained data above, obtain pointing system and interference rejection capability is closed with the curve of frequency
System, using logarithmic coordinates, as shown in Figure 2.As can see from Figure 2 pointing system to the rejection ability of interference is 0dB when
Corresponding frequency is 115Hz or so.
Claims (2)
1. a kind of measure the device that pointing system interference suppresses bandwidth, including parallel light tube (1), beacon light laser (2), piezoelectricity
Ceramic fast mirror (3), piezoelectric ceramic actuator (4), signal generator (5), tested pointing system (6), it is characterised in that：
The beacon light laser (2) is optical fiber laser, and fiber end face is located at the focal plane of parallel light tube (1)；
The laser that the beacon light laser (2) sends enters parallel light tube (1) after piezoelectric ceramics fast mirror (3),
Collimated light beam is produced by parallel light tube (1), into tested pointing system (6)；
The signal generator (5) produces input signal and gives piezoelectric ceramic actuator (4), drives piezoelectric ceramics fast mirror
(3) yaw motion is carried out.
2. a kind of surveyed based on a kind of disturbance rejection bandwidth for measuring the device that pointing system interference suppresses bandwidth described in claim 1
Amount method, it is characterised in that comprise the following steps：
1) sinusoidal signal that frequency is X is produced using signal generator (5), inputs to piezoelectric ceramic actuator (4) driving piezoelectricity
It is X that ceramic fast mirror (3), which produces frequency, and amplitude is θ swing；The fiber end face of beacon light laser (2) is apart from piezoelectricity
The distance of ceramic fast mirror (3) minute surface is L, and the focal plane of parallel light tube is f, then can produce frequency for X, and amplitude is 2L θ/f
Beacon angular interference；
2) pointing system (6) tracking step 1 to be measured) produce beacon beam, now system tracking residual error be also frequency be X just
String signal, the corresponding angular amplitude of residual error is θ '；Then show that pointing system is D=to the rejection ability of interference when frequency is X
θ′f/(2Lθ)；
3) increase step 1 successively since the low frequency) in interfering frequency X, pointing system (6) to be measured is to dry under measurement different frequency
The rejection ability D (X) disturbed, carries out the fitting of data, as D (X0During)=0, X0The AF panel band of pointing system (6) as to be measured
It is wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563680.1A CN107204801A (en) | 2017-07-12 | 2017-07-12 | It is a kind of to measure the device and method that pointing system interference suppresses bandwidth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563680.1A CN107204801A (en) | 2017-07-12 | 2017-07-12 | It is a kind of to measure the device and method that pointing system interference suppresses bandwidth |
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| CN107204801A true CN107204801A (en) | 2017-09-26 |
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| CN201710563680.1A Pending CN107204801A (en) | 2017-07-12 | 2017-07-12 | It is a kind of to measure the device and method that pointing system interference suppresses bandwidth |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209221A (en) * | 2016-04-15 | 2016-12-07 | 中国科学院上海技术物理研究所 | The measurement apparatus of a kind of facula mass center extraction accuracy and measuring method |
| CN106374998A (en) * | 2016-10-13 | 2017-02-01 | 中国科学院上海技术物理研究所 | Device and method of measuring beacon light spot displacement sensitivity by tracking and pointing system |
| CN206149275U (en) * | 2016-10-13 | 2017-05-03 | 中国科学院上海技术物理研究所 | Measurement device for with taking aim at system to beacon facula displacement sensitivity |
| CN207010678U (en) * | 2017-07-12 | 2018-02-13 | 中国科学院上海技术物理研究所 | A kind of device for measuring pointing system interference and suppressing bandwidth |
-
2017
- 2017-07-12 CN CN201710563680.1A patent/CN107204801A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209221A (en) * | 2016-04-15 | 2016-12-07 | 中国科学院上海技术物理研究所 | The measurement apparatus of a kind of facula mass center extraction accuracy and measuring method |
| CN106374998A (en) * | 2016-10-13 | 2017-02-01 | 中国科学院上海技术物理研究所 | Device and method of measuring beacon light spot displacement sensitivity by tracking and pointing system |
| CN206149275U (en) * | 2016-10-13 | 2017-05-03 | 中国科学院上海技术物理研究所 | Measurement device for with taking aim at system to beacon facula displacement sensitivity |
| CN207010678U (en) * | 2017-07-12 | 2018-02-13 | 中国科学院上海技术物理研究所 | A kind of device for measuring pointing system interference and suppressing bandwidth |
Non-Patent Citations (4)
| Title |
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| 岳冰等: "空间光通信中的快速倾斜镜精跟踪实验***", 《光电工程》 * |
| 林均仰等: "高带宽量子通信信标跟踪技术研究", 《光通信技术》 * |
| 秦谊等: "卫星激光通信跟瞄精度测试方法及其实验研究", 《光学技术》 * |
| 陈少杰等: "数模转换器分辨率对捕获、跟踪、瞄准***跟踪精度的影响", 《中国激光》 * |
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