An integrated steering law considering biased loads and singularity for control moment gyroscopes

Y. Nanamori, Masaki Takahashi

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

A new steering law of control moment gyroscopes (CMGs) is proposed to ensure extended life and to reduce the risk of failure. Because major failure mode of the CMG is the defective lubrication of the spin bearings resulting from being put on the excessive radial loads by radical motion of gimbals, the proposed method attempts to level gimbal angular displacements and to suppress radical motion of gimbals applying a relation between the gimbal angular displacement of each CMG and the initial condition of gimbal angles. A suitable set of initial gimbal angles is selected using a defined evaluation function in an offline preliminarily calculation. The evaluation function considers the average and variance of the gimbal angular displacement and the acceleration of the upcoming maneuver. The dynamics of a typical pyramid configuration of four single-gimbal CMGs was modeled and a numerical simulation was carried out to evaluate the performance of the proposed method. Numerical simulation confirmed that the proposed method levels the gimbal angular displacements of CMGs and suppresses radical motion of gimbals without degrading attitude control. The leveling of CMG loads was more effective in the case that the CMGs do not pass a singularity. In contrast, the suppression of radical motion of gimbals was more effective in the case the CMGs pass through the singularity. Moreover, the validity in the case of repetitive maneuvers was also verified by executing null motion at appropriate intervals.

本文言語English
ホスト出版物のタイトルAIAA Guidance, Navigation, and Control Conference
出版社American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN(印刷版)9781624103391
出版ステータスPublished - 2015
イベントAIAA Guidance, Navigation, and Control Conference, 2015 - Kissimmee, United States
継続期間: 2015 1月 52015 1月 9

Other

OtherAIAA Guidance, Navigation, and Control Conference, 2015
国/地域United States
CityKissimmee
Period15/1/515/1/9

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 航空宇宙工学
  • 制御およびシステム工学

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