Mr. Gan Xun Profile

Gan Xun

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Publications (4)

Proceedings Article | 27 September 2016 Paper

Online damage inspection of optics for ATP system

Jing Chen, Yu Jiang, Yao Mao, Xun Gan, Qiong Liu

Proceedings Volume 9684, 968432 (2016) https://doi.org/10.1117/12.2243287

KEYWORDS: Acquisition tracking and pointing, Optical inspection, Inspection, Optical components, Image segmentation, Image acquisition, Image processing, Imaging systems, Video, Air contamination

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Proceedings Article | 15 October 2015 Paper

The effect of physical parameters of inertial stabilization platform on disturbance rejection ability and its improvement method

Yao Mao, Chao Deng, Xun Gan, Jing Tian

Proceedings Volume 9676, 96760U (2015) https://doi.org/10.1117/12.2199692

KEYWORDS: Vibration isolation, Control systems, Optical tracking, Acquisition tracking and pointing, Line of sight stabilization, Free space optical communications, Telecommunications, Sensors, Optical communications, Electronics

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The development of space optical communication requires arcsecond precision or even higher precision of the tracking performance of ATP(Acquisition, Tracking and Pointing) system under the condition of base disturbance. ATP system supported by stabilized reference beam which is provided by inertial stabilization platform with high precision and high bandwidth, can effectively restrain the influence of base angular disturbance on the line of sight.

To get better disturbance rejection ability, this paper analyzes the influence of transfer characteristics and physical parameters of stabilization platform on disturbance stabilization performance, the result shows that the stabilization characteristics of inertial stabilization platform equals to the product of rejection characteristics of control loop and disturbance transfer characteristics of the platform, and improving isolation characteristics of the platform or extending control bandwidth can both achieve the result of getting a better rejection ability.

Limited by factors such as mechanical characteristics of stabilization platform, bandwidth/noise of the sensor, and so on, as the control bandwidth of the LOS stabilization platform is limited, and high frequency disturbance can not be effectively rejected, so the rejection of high frequency disturbance mainly depends on the isolation characteristics of the platform itself.

This paper puts forward three methods of improving the isolation characteristics of the platform itself, which includes 1) changing mechanical structure, such as reducing elastic coefficient, increasing moment of inertia of the platform, and so on; 2) changing electrical structure of the platform, such as increasing resistance, adding current loop, and so on; 3)adding a passive vibration isolator between the inertial stabilization platform and the base. The result of the experiment shows that adding current loop or adding a passive vibration isolator can effectively reject high frequency disturbance.

Proceedings Article | 15 October 2015 Paper

The application of frequency characteristics test in fast control mirror system

Xun Gan, Yu Jang, Zong You Wang, Yao Mao

Proceedings Volume 9676, 96760Q (2015) https://doi.org/10.1117/12.2199366

KEYWORDS: Signal to noise ratio, Control systems, Interference (communication), Mirrors, Computer simulations, MATLAB, Feedback signals, Control systems design, Servomechanisms, Precision measurement

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Proceedings Article | 15 October 2015 Paper

Application of independent component analysis in target trajectory prediction based on moving platform

Chao Deng, Yao Mao, Xun Gan, Jing Tian

Proceedings Volume 9676, 96760T (2015) https://doi.org/10.1117/12.2199623

KEYWORDS: Independent component analysis, Electro optical systems, Sensors, Linear filtering, Electro optics, Control systems, Computer programming, Interference (communication), Optimization (mathematics), Detection theory

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