A new adaptive second-order sliding mode control method is proposed for the attitude control of flexible spacecraft during slew maneuver. Compared with traditional sliding mode control, the second sliding mode control approach guarantees the same robustness and precision, feature higher order accuracy and can be exploited to eliminate the chattering phenomenon. In the present paper, a second-order sliding mode controller is designed by treating the input of the system as a new state variable, while using it's derivate as the actual control. A fuzzy-neural network is adopted to approximate the strong coupling uncertain nonlinear dynamics, and the on-line adaptive weights tuning law is derived, the global stability of the system is guaranteed. Simulation results show the effectiveness of the proposed method.

Date Published: 13 October 2008
PDF: 6 pages
Proc. SPIE 7128, Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment, 712829 (13 October 2008); doi: 10.1117/12.806866

Published in SPIE Proceedings Vol. 7128:
Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment
Jiancheng Fang; Zhongyu Wang, Editor(s)