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Proceedings Paper

Control system for multi-motor friction drive of a large-scale optical telescope
Author(s): Yao Mao; Jia-Guang Ma; Qi-liang Bao; Song-hua Yang
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Paper Abstract

In terms of large-scale optical telescope, the design of multi-motor friction drive is obviously advantageous than that of single motor direct drive on the expense for manufacture of motors. However, to keep the high accuracy of tracking of multi-motor friction drive in certain velocity and acceleration, synchronized control for multi-motor and compensation to the mechanical resonance are needed. After designing appropriate multi-motor drive and synchronized compensation device, we overcame the interference among running motors, restricted the velocity difference in smooth running to a smaller range, and set a good foundation for the design of correcting parameter. Besides, to expand the closed loop bandwidth of the system, the control loop model has been identified, and the compensator based on the identified model effectively improved the influence of the mechanical resonance. The experimental results showed that for multi-motor friction drive of the 1.2-m large-scale Alt-Azimuth optical telescope, the proposed approach obtained high accuracy when running at the max velocity of 3 deg/s.

Paper Details

Date Published: 5 May 2009
PDF: 6 pages
Proc. SPIE 7281, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 728107 (5 May 2009); doi: 10.1117/12.831430
Show Author Affiliations
Yao Mao, Institute of Optics and Electronics (China)
Graduate School of the Chinese Academy of Sciences (China)
Jia-Guang Ma, Insitute of Optics and Electronics (China)
Qi-liang Bao, Institute of Optics and Electronics (China)
Song-hua Yang, Southwest Univ. (China)


Published in SPIE Proceedings Vol. 7281:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Wenhan Jiang; Roland Geyl; Myung K. Cho; Fan Wu, Editor(s)

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