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Proceedings Paper

A high precision dual feedback discrete control system designed for satellite trajector simulator
Author(s): Ximin Liu; Liren Liu; Jianfeng Sun; Nan Xu
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Paper Abstract

Cooperating with the free-space laser communication terminals, the satellite trajectory simulator is used to test the acquisition, pointing, tracking and communicating performances of the terminals. So the satellite trajectory simulator plays an important role in terminal ground test and verification. Using the double-prism, Sun etc in our group designed a satellite trajectory simulator. In this paper, a high precision dual feedback discrete control system designed for the simulator is given and a digital fabrication of the simulator is made correspondingly. In the dual feedback discrete control system, Proportional- Integral controller is used in velocity feedback loop and Proportional- Integral- Derivative controller is used in position feedback loop. In the controller design, simplex method is introduced and an improvement to the method is made. According to the transfer function of the control system in Z domain, the digital fabrication of the simulator is given when it is exposed to mechanism error and moment disturbance. Typically, when the mechanism error is 100urad, the residual standard error of pitching angle, azimuth angle, x-coordinate position and y-coordinate position are 0.49urad, 6.12urad, 4.56urad, 4.09urad respectively. When the moment disturbance is 0.1rad, the residual standard error of pitching angle, azimuth angle, x-coordinate position and y-coordinate position are 0.26urad, 0.22urad, 0.16urad, 0.15urad respectively. The digital fabrication results demonstrate that the dual feedback discrete control system designed for the simulator can achieve the anticipated high precision performance.

Paper Details

Date Published: 12 September 2005
PDF: 10 pages
Proc. SPIE 5892, Free-Space Laser Communications V, 58921K (12 September 2005); doi: 10.1117/12.612663
Show Author Affiliations
Ximin Liu, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Nan Xu, Shanghai Institute of Optics and Fine Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 5892:
Free-Space Laser Communications V
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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