Improvement of fault tolerance of CMG by smooth control law switching based on autonomous judgment

2016 Fiscal Year Final Research Report

• Project/Area Number: 25289309
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: KOJIMA Hirohisa 首都大学東京, システムデザイン研究科, 教授 (50322350)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: コントロールモーメントジャイロ / ジンバル駆動則 / 故障同定 / 劣駆動制御 / バックステッピング制御 / 適応則 / 微小重力実験

Outline of Final Research Achievements

In this study, in order to improve the fault tolerance of adaptive skew control moment gyroscope (ASCMG), an adjustment control method has been proposed, which can identify a fault CMG unit and smoothly switch the steering control laws. It is shown through numerical simulations that the fault CMG unit can be identified by integrating and evaluating the difference between the commanded torque and the actual output torque for a fixed time, and that the attitude can be stabilized to the target attitude by the proposed adjustment method in which the steering control laws are smoothly switched according to the fault identification. In addition, it has been verified through experiments under a microgravity condition that line-of-sight attitude maneuver can be achieved by a backstepping-based steering control law even in the case of two-CMG units failure.

Free Research Field

宇宙工学