University of Tokyo
Japan Aerospace Exploration Agency (JAXA)
Japan Aerospace Exploration Agency (JAXA)
University of Electro-Communications (UEC)
University of Electro-Communications (UEC)
Japan Aerospace Exploration Agency (JAXA)
Japan Aerospace Exploration Agency (JAXA)
Japan Aerospace Exploration Agency (JAXA)
Japan Aerospace Exploration Agency (JAXA)
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
雑誌名
アストロダイナミクスシンポジウム講演後刷り集
雑誌名(英)
Proceedings of 18th workshop on JAXA Astrodynamics and flight mechanics
巻
2008
発行年
2009-03
会議概要（会議名, 開催地, 会期, 主催者等）（英）
Symposium on Flight Mechanics and Astrodynamics 2008 (July 28-29, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)), Sagamihara, Kanagawa Japan
Astro-G is a flexible satellite, which has challenging specifications for attitude control system (ACS) in order to achieve its space VLBI (Very Long Baseline Interferometry) mission, called VSOP (VLBI Space Observatory Programme)-2. VSOP-2 mission requires Astro-G to change its attitude angle for 3 deg in 15 s, and attitude angle error to be less than 0.002 deg after the maneuver, while VSOP-2 mission also requires Astro-G to equip a large deployable antenna. This antenna of 9 m diameter is for VLBI observation and, obviously, should be handled as flexible structure. For these reasons, ACS of Astro-G must have both high-speed and high-precision performance and robustness to uncertainty of flexible structures. In addition, high-speed maneuver mission also requires Astro-G to equip CMGs (Control Momentum Gyros), which have complex mechanism, and therefore need to be studied. In this paper, we studied about Astro-G's ACS with 2 DOF (Degree Of Freedom) control, consists of robust feedbackcontrol and reference with MNME (Modified Nil-Mode-Exciting) profiler, which is based on input shaping and NME profiler. We also studied how to use the CMGs as feedback actuator. The designed 2 DOF control were discussed through numerical simulations.
柔軟構造を有する人工衛星ASTRO-GのためのCMGの動力学を考慮した高速・高精度姿勢制御の一検討
