Sliding Mode Fault-Tolerant Control for Air-Breathing Hypersonic Vehicles with External Disturbances

Abstract

This paper studies the fault-tolerant control for air-breathing hypersonic flight vehicles(AHFVs) subject to both actuator faults and external disturbances. The overall procedure includes the feedback linearization of the model and the adaptive sliding mode control design. Specifically, a feedback linearized model of AHFVs is firstly obtained with the actuator faults and external disturbances. Then, two adaptive laws are designed to approximately estimate their unknown bounds. Based on the Lyapunov analysis method, it is proved that adaptive sliding mode control law can achieve the asymptotic tracking of all commands signals and guarantee the stability of the system. Simulations are conducted to confirm the efficacy of the proposed control method.