Design and implementation of robust symmetric attitude controller for ETS-VIII spacecraft |
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Authors: | Tomoyuki Nagashio Takashi Kida Takashi Ohtani Yoshiro Hamada |
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Affiliation: | 1. University of Electro-Communications, 1-5-1 Chofugaoka Chofu, Tokyo, Japan;2. Japan Aerospace Exploration Agency, 7-44-1 Jindaiji Higashi-machi Chofu, Tokyo, Japan |
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Abstract: | To meet increasing mission requirements, communication satellites are being equipped with large flexible antenna reflectors and solar paddles. A typical such satellite, the Engineering Test Satellite VIII (ETS-VIII) spacecraft, was launched into geostationary orbit by the Japan Aerospace Exploration Agency (JAXA) in December 2006. The main mission of ETS-VIII is to support next-generation mobile digital communications, and for this purpose it is equipped with two large deployable antenna reflectors and a pair of large solar paddles that rotate around the pitch axis. The authors are planning to perform on-orbit attitude control experiments using ETS-VIII at the end of its mission life, aiming to develop a baseline for future controller design for this class of satellite using advanced control theories. This paper proposes two degrees-of-freedom control based on robust direct velocity and displacement feedback as a candidate controller technology. The spacecraft modeling and controller synthesis methods are discussed, and a controller implementation for an on-orbit control experiment is presented with simulation results. |
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