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Proceedings Paper

2-port internal model control for gyro stabilized platform of electro-optical tracking system
Author(s): Yun-xia Xia; Qi-liang Bao; Zhi-jun Li; Qiong-yan Wu
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Paper Abstract

Line-of-sight stabilized system, which can be used to isolate the vibration of the moving bed and the disturbance of environment, is the most important part of an electro-optical tracking system. The steady precision and robustness are the key issues of recent researches. In this paper, a novel control approach so called 2-Port Internal Model Control (2-PIMC) for line-of-sight stabilized system is proposed. By adding a parallel feedback control loop on the basis of Internal Model Control (IMC), the 2-PIMC method can improve precision while it also has strong robustness as the IMC. The robustness and the static error of 2-PIMC method were subsequently analyzed. Based on this novel method, Simulation and experiment are both carried out for a gyro stabilized platform of electro-optical tracking system. The experiments include a shaking table which can generate disturbance as the moving bed and a gyro stabilized platform which is mounted on the shaking table. The experimental result indicated that the gyro stabilized platform using 2-PIMC method is accurate and effective. Comparing with PI control, the following error and disturbance restraining error were both greatly improved at low-frequency and mid-frequency by the 2-PIMC method proposed. The improvement of precision is more than 10dB at 4Hz. In addition, the 2-PIMC method doesn't need any extra sensors for the platform and it's easy for parameters regulation. It can be concluded that the2-PIMC method is a new approach for the high-performance gyro stabilized platform and might have broad application prospect.

Paper Details

Date Published: 15 May 2012
PDF: 7 pages
Proc. SPIE 8395, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXVI, 83950M (15 May 2012); doi: 10.1117/12.920402
Show Author Affiliations
Yun-xia Xia, Institute of Optics and Electronics (China)
Graduate School of the Chinese Academy of Science (China)
Qi-liang Bao, Institute of Optics and Electronics (China)
Zhi-jun Li, Institute of Optics and Electronics (China)
Qiong-yan Wu, Institute of Optics and Electronics (China)

Published in SPIE Proceedings Vol. 8395:
Acquisition, Tracking, Pointing, and Laser Systems Technologies XXVI
William E. Thompson; Paul F. McManamon, Editor(s)

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