A high precision dual feedback discrete control system designed for satellite trajector simulator

Ximin Liu; Liren Liu; Jianfeng Sun; Nan Xu

doi:10.1117/12.612663

12 September 2005 A high precision dual feedback discrete control system designed for satellite trajectory simulator

Ximin Liu, Liren Liu, Jianfeng Sun, Nan Xu

Proceedings Volume 5892, Free-Space Laser Communications V; 58921K (2005) https://doi.org/10.1117/12.612663
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Ximin Liu, Liren Liu, Jianfeng Sun, and Nan Xu "A high precision dual feedback discrete control system designed for satellite trajectory simulator", Proc. SPIE 5892, Free-Space Laser Communications V, 58921K (12 September 2005); https://doi.org/10.1117/12.612663

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KEYWORDS

Satellites

Control systems design

Control systems

Device simulation

Feedback control

Feedback loops

Prisms

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