Adaptive Fault-tolerant Controller for Hypersonic Flight Vehicle with State Constraints Using Integral Barrier Lyapunov Function

Abstract

For hypersonic flight vehicles (HFVs), this article designs an adaptive fault-tolerant controller to achieve full-state constraints. Firstly, integral barrier Lyapunov function (iBLF) is applied on the parameterized longitudinal model to ensure that the flight path angle (FPA), the angle of attack (AOA), and the pitch rate in the constraint interval, and the problem of “differential expansion” of is avoided because of the introduction of the dynamic surface method. Then, aiming at the unknown fault of the rudder surface, the fault-tolerant controller structure is designed. Finally, it is proved using Lyapunov theory that the proposed method can ensure the closed-loop stability of the system. Also, a simulation is provided to show the effectiveness of the iBLF -based backstepping method.