Fault-Tolerant Flight Control Design With Finite-Time Adaptation Under Actuator Stuck Failures

This paper presents an adaptive fault-tolerant flight control (FTFC) scheme to counteract actuator stuck failures, where the issues on saturation avoidance of redundant actuators and finite-time adaptation of FTFC are addressed. The "positive μ-modification" technique and the adjustable reference model are exploited for preventing redundant actuators from saturation or secondary damage. In addition, the integration of the auxiliary integrated regressor matrix ensures that the FTFC law is determined within a finite amount of time. Therefore, the accommodation process of actuator stuck failures can be facilitated. Numerical simulation studies based on the nonlinear aircraft models are illustrated to highlight the effectiveness of the proposed methodology.