点击次数：

论文类型：期刊论文

发表时间：2015-06-01

发表刊物：AEROSPACE SCIENCE AND TECHNOLOGY

收录刊物：SCIE、EI

卷号：43

页面范围：213-218

ISSN号：1270-9638

关键字：Attitude control; Robust control; Wheel friction; Observer; Spacecraft

摘要：This paper investigates the attitude control problem in the presence of wheel low-speed friction and external disturbances. The critical issues surrounding wheel friction are firstly discussed, and the spacecraft attitude model and wheel friction model are introduced. A friction observer that can effectively estimate the friction torque is developed. An observer-based sliding mode controller, to perform attitude maneuver, is then proposed. By constructing a particular Lyapunov function, the stability and performance of the proposed controller for the closed-loop systems is discussed theoretically. Numerical simulations are finally provided, and the results have demonstrated that the friction is compensated by the observer and the proposed controller has better transient and steady-state performance. (C) 2015 Elsevier Masson SAS. All rights reserved.