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Proceedings Paper

H mix sensitivity controller design based on GIMC for electro-optical stabilization and tracking system
Author(s): Zi-dong Liu; Qi-liang Bao; Yunxia Xia; Xiang Liu
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Paper Abstract

Electro-optical stabilization and tracking system is critical and difficult issue in satellite laser communication. Moreover, line-of-sight stabilized system is the kernel of implementing electro-optical stabilization and tracking system, which can be used to isolate the vibration of the moving platform of the satellite and the disturbance of the space environment. In this paper, we propose a new method, which using H∞ mix sensitivity based on generalized internal model controller (GIMC), to design the control system of the electro-optical stabilized platform. It is well known that there is an intrinsic conflict between performance and robustness in the standard feedback framework. Generalized internal model controller is a new architecture which can separate the performance and robustness design in controller design. This architecture has two parts: a high performance controller, say K0,which is designed by PI controller in this paper, and then a robustification controller, say Q, which is designed to improve the ability of the anti disturbance by using H-infinity mix sensitivity controller design method. In this paper, we also present the steps of controller design by using this method to make it easier to use. Based on the proposed method, numerical simulation and experiment are both carried out for a gyro stabilized platform of electro-optical tacking system. Both the numerical simulated and the experimental results show that the electro-optical stabilized platform using the H-infinity mix sensitivity controller design method based on GIMC is accurate and effective. Comparing with the same PI controller in standard feedback framework, the proposed method can guarantee the high tracking performance as same as the PI controller and improve the external disturbance restraining ability a lot. In conclusion, H-infinity mix sensitivity controller design method based on GIMC is a new approach for gyro stabilized platform of electro-optical stabilization and tracking system and might be used easily in practical.

Paper Details

Date Published: 21 August 2013
PDF: 10 pages
Proc. SPIE 8906, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems, 89061Y (21 August 2013); doi: 10.1117/12.2034601
Show Author Affiliations
Zi-dong Liu, Institute of Optics and Electronics (China)
Key Lab. of Beam Control (China)
Univ. of Chinese Academy of Science (China)
Qi-liang Bao, Institute of Optics and Electronics (China)
Key Lab. of Beam Control (China)
Yunxia Xia, Institute of Optics and Electronics (China)
Key Lab. of Beam Control (China)
Univ. of Chinese Academy of Science (China)
Xiang Liu, Institute of Optics and Electronics (China)
Key Lab. of Beam Control (China)
Univ. of Chinese Academy of Science (China)


Published in SPIE Proceedings Vol. 8906:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems
Keith E. Wilson; Jing Ma; Liren Liu; Huilin Jiang; Xizheng Ke, Editor(s)

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