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http://dx.doi.org/10.5139/JKSAS.2021.49.5.389

Analysis of Angular Velocity Stabilization of Spacecraft After One Control Moment Gyroscope's Failure  

Jin, Jaehyun (Dept. Aerospace Engineering/Center for Aerospace Engineering, Sunchon National University)
Leeghim, Henzeh (Dept. of Aerospace Engineering, Chosun University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.49, no.5, 2021 , pp. 389-397 More about this Journal
Abstract
The control characteristics after the failure of the control moment gyros, the actuators for satellite attitude control, were analyzed. In particular, the situation where one out of four failed was considered. For the most commonly used pyramids and box-90 structures, the singularities and singular surfaces after failure were analyzed and compared. Dynamic equations for the process of reducing the wheel speed after the failure were derived. The process of stabilizing the angular velocity of a satellite while absorbing the momentum of the faulty module by the three normal modules was analyzed. For singular shapes, the remaining CMGs may be locked or excessively shake. The authors proposed that it can be prevented by rearranging the gimbal angles.
Keywords
Control Moment Gyroscope; Singularity Analysis; Fault; Angular Velocity Stabilization;
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Times Cited By KSCI : 1  (Citation Analysis)
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