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Proceedings Paper

Simulation of the fast steering mirror control system based on gyro velocity feedback
Author(s): Jiagming Kuang; Tao Tang; Chengyu Fu; Ke Ding; Wei Yu
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Paper Abstract

The fast steering mirror is a significant element of the photoelectric precision tracking system and is mainly used for attenuating the tracking error of the main axis and rejecting the line-of-sight jitter caused by various disturbances. A control loop model is constructed and object parameters have been identified according to this model in this paper. Low sampling frequency introduce great delay into the imaging tracking system, which may restrict greatly the closed-loop bandwidth, reduce tracking precision of the system and even make the system unsteady. Various elements which limit tracking loop bandwidth are presented and analyzed. Three tracking systems with different sampling frequency are simulated and analyzed. From the simulation result the conclusion can be drawn that it is difficult to increase the closedloop bandwidth in the presence of great delay by means of the general control method. Accordingly feedback control or feed forward control may be tried to improve the error attenuation of the system. The micro-mechanical gyro can be used for measuring the angular velocity of fast steering mirror, so output of velocity gyro as velocity loop feedback may improve the system performance. Furthermore, the velocity loop feedback can enhance the rigidity and the output stability of the tracking system. Finally, the velocity feedback can increase the type of the open loop system; consequently it will improve the error attenuation of the system. The simulation result shows that the tracking precision of the system with velocity feedback is 10 times better than the system without velocity feedback.

Paper Details

Date Published: 23 November 2009
PDF: 9 pages
Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75080Z (23 November 2009); doi: 10.1117/12.837731
Show Author Affiliations
Jiagming Kuang, The Key Lab. of Beam Control (China)
Institute of Optics and Electrics (China)
Graduate School of Chinese Academy of Sciences (China)
Tao Tang, The Key Lab. of Beam Control (China)
Institute of Optics and Electrics (China)
Chengyu Fu, The Key Lab. of Beam Control (China)
Institute of Optics and Electrics (China)
Ke Ding, The Key Lab. of Beam Control (China)
Institute of Optics and Electrics (China)
Graduate School of Chinese Academy of Sciences (China)
Wei Yu, The Key Lab. of Beam Control (China)
Institute of Optics and Electrics (China)
Graduate School of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 7508:
2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications
YanBiao Liao; Anbo Wang; Tingyun Wang; Yukihiro Ishii, Editor(s)

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