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Proceedings Paper

Low velocity tracking control-based ADRC for large-scale telescope system
Author(s): Huaxiang Cai; Yongmei Huang; Junfeng Du; Tao Tang; Dan Zuo
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Paper Abstract

In this paper, an improved Active Disturbance Rejection control (ADRC) method is proposed to enhance the tracking precision of telescope if the telescope runs in a low velocity. Low velocity telescope system usually suffers some obvious nonlinear disturbances, such as nonlinear friction and unknown external disturbance. Thereby, to ensure the tracking precision, multiple loops control structure is a common control method in telescope system, which includes current loop, velocity loop and position loop. The proposed control method is used in the velocity loop which consists of a PD controller and an Extend State Observer (ESO). The ESO is designed to estimate the disturbance involved in the telescope system. Besides, the PD controller is designed to stabilize the closed-loop system. Furthermore, this control method theoretically guarantees a prescribed tracking performance and final tracking accuracy. Finally, the experiment results show that the proposed control method has excellent performance for reducing the tracking error of low velocity.

Paper Details

Date Published: 8 October 2015
PDF: 6 pages
Proc. SPIE 9678, AOPC 2015: Telescope and Space Optical Instrumentation, 967803 (8 October 2015); doi: 10.1117/12.2196799
Show Author Affiliations
Huaxiang Cai, Institute of Optics and Electronics (China)
Key Lab. of Beam Control of Optical Engineering (China)
Univ. of Chinese Academy of Sciences (China)
Yongmei Huang, Institute of Optics and Electronics (China)
Key Lab. of Beam Control of Optical Engineering (China)
Junfeng Du, Institute of Optics and Electronics (China)
Key Lab. of Beam Control of Optical Engineering (China)
Tao Tang, Institute of Optics and Electronics (China)
Key Lab. of Beam Control of Optical Engineering (China)
Dan Zuo, Institute of Optics and Electronics (China)
Key Lab. of Beam Control of Optical Engineering (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 9678:
AOPC 2015: Telescope and Space Optical Instrumentation
Bin Xiangli; Dae Wook Kim; Suijian Xue, Editor(s)

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