A Lyapunov Method Based Terminal Sliding Mode Actuator Failure Compensation Scheme for Near-Space Vehicles

Abstract

This paper presents a new terminal sliding mode actuator failure compensation control scheme for the nonlinear system of near-space vehicle. The proposed method can ensure that the tracking errors of near-space vehicles converge to zero in finite time after encountering unknown actuator failure. Different from other traditional terminal sliding mode control methods, this method makes the system avoid the singularity problem; Also, this method can ensure the stability of the system, and only needs to consider the sliding stage of the sliding mode control. Furthermore, on this basis, the system errors can still converge to zero in finite time with actuator failures. Finally, the terminal sliding mode control algorithm is used for the near-space vehicle with actuator failures, and the simulation results show the effectiveness of the algorithm.