Integral Sliding Mode Fault-Tolerant Control for Spacecraft With Uncertainties and Saturation.

An integral sliding mode fault-tolerant control method is proposed to deal with faults with matched uncertainties, unmatched uncertainties, and input saturation. Integral sliding mode, control allocation, and parameter identification are included in this method. The Lyapunov stability conditions of the integral sliding mode control for uncertainties and input saturation, respectively, are obtained, which denote the robustness extent of the controller. The direct method for control allocation is improved by adding a judgement before calculating for each facet. Finally, the fault-tolerant scheme is applied to a six-wheel spacecraft and simulations are given to show its effectiveness. [ABSTRACT FROM AUTHOR]