title: Finite-time fault tolerant attitude stabilization control for rigid spacecraft.
abstract: A sliding mode based finite-time control scheme is presented to address the problem of attitude stabilization for rigid spacecraft in the presence of actuator fault and external disturbances. More specifically, a nonlinear observer is first proposed to reconstruct the amplitude of actuator faults and external disturbances. It is proved that precise reconstruction with zero observer error is achieved in finite time. Then, together with the system states, the reconstructed information is used to synthesize a nonsingular terminal sliding mode attitude controller. The attitude and the angular velocity are asymptotically governed to zero with finite-time convergence. A numerical example is presented to demonstrate the effectiveness of the proposed scheme.
authors.affiliation: College of Engineering, Bohai University, Jinzhou 121000, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Huo
authors.affiliation: Department of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, China. Electronic address: huqinglei@hit.edu.cn.
authors.forename: Qinglei
authors.initials: Q
authors.lastname: Hu
authors.affiliation: Department of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Xiao
keywords: Actuator fault; Attitude stabilization; Finite-time; Reconstruction; Sliding mode control; Spacecraft