JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleConsiderations about the disturbance and the construction way of a space solar power system with gravity-gradient stabilization
Author(jpn)高井 伸明; 石村 康生; 佐々木 進
Author(eng)Takai, Nobuaki; Ishimura, Kosei; Sasaki, Susumu
Author Affiliation(jpn)北海道大学 大学院工学研究科; 北海道大学 大学院工学研究科; 宇宙航空研究開発機構 宇宙科学研究本部
Author Affiliation(eng)Hokkaido University Graduate School of Engineering; Hokkaido University Graduate School of Engineering; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
Issue Date2004-06
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第23回宇宙エネルギーシンポジウム 平成15年度
The 23rd ISAS Space Energy Symposium March 9, 2004
Start page89
End page93
Publication date2004-06
AbstractA SPS (Solar Power Satellite) which is a part of the Space Solar System (SSPS) project has been studied at the USEF. Quasi-static analysis had been carried out for the practical SPS. The present purpose is to evaluate the attitude stability of the SPS under construction. During construction, it is assumed that the modules of 100 x 95 sq m are arranged in the shape of line. As the result of quasi-static analysis, it is shown that the roll and yaw angular frequencies of attitude motion are twice and once as large as orbital angular velocity in first step of the construction, respectively. Furthermore, as the result of dynamical analysis, amplitudes of the roll and yaw angles tend to divergence in first step. To avoid such a divergence, another model was proposed which is constructed keeping similar configuration. The construction way is called construction with similarity. From the result of simulations, it is shown that divergences in the roll and yaw angles can be avoided in the construction with similarity. However, the stability around the pitch and yaw axes are weak in first step for construction with similarity. In particular, maximum amplitude around the pitch axis is 5 deg. Therefore, both constructions need active attitude control because there are problems in first step of the constructions.
Keywordssolar power satellite; gravity-gradient stabilization; spacecraft stability; dynamic stability; resonant frequency; satellite design; moment of inertia; assembling; 太陽発電衛星; 重力勾配安定化; 宇宙機安定性; 動的安定性; 共鳴周波数; 衛星設計; 慣性モーメント; 組立て
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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