Adaptive Finite-Time Fault-Tolerant Control of Uncertain Systems With Input Saturation

In this article, an adaptive finite-time fault-tolerant control (FTC) strategy is proposed for state tracking of uncertain systems subject to actuator faults and input saturation. The actuator faults, which include multiplicative and time-varying additive modes, are allowed to be unknown. To deal with the coupling of the unknown model uncertainties and the actuator faults, an adaptive mechanism is designed based on a wisely chosen Lyapunov function. The proposed finite-time FTC scheme, with adaptive laws of uncertain parameters, guarantees the stability of the closed-loop system, and the practical finite-time state tracking property. Then, the algorithm is applied to a flight control system, simulation and comparison results demonstrate the effectiveness and advantages of the designed control scheme.

Automated summary

In this article, an adaptive finite-time fault-tolerant control (FTC) strategy is proposed for state tracking of uncertain systems subject to actuator faults and input saturation. The proposed control scheme effectively deals with the coupling of unknown model uncertainties and actuator faults using an adaptive mechanism based on a wisely chosen Lyapunov function. Simulation and comparison results in a flight control system show the effectiveness and advantages of the proposed control scheme.