Adaptive Fixed-Time Non-singular Terminal Sliding Mode Attitude Stabilization Control for Rigid Spacecraft with Actuator Faults

Fixed-time convergence control strategies based on adaptive Non-Singular Terminal Sliding Mode are proposed for rigid spacecraft attitude stabilization subject to actuator faults. A novel fixed-time sliding mode surface is used. Then, a fixed-time controller with adaptive law is derived to guarantee that the closed-loop system is stable in the sense of the fixed-time concept. Finally, the Lyapunov stability analysis shows that the controller has a good fault-tolerant performance on actuator faults. Numerical simulation verified the good performance of the controller in the attitude stabilization control.