Adaptive predefined-time fault-tolerant control for carrier landing under actuator effectiveness loss

This paper proposes an adaptive predefined-time fault-tolerant control scheme for carrier-based aircraft landing under actuator faults, airwake disturbances, and input saturation. Based on predefined-time stability theory, a generalized parameterized Lyapunov condition is established and rigorously proven. The carrier landing controller is designed incorporating predefined-time command filters with dynamic error compensation to avoid complexity explosion, an adaptive mechanism with projection operators to address actuator faults, and anti-saturation auxiliary systems. Lyapunov analysis proves that the closed-loop system converges within a predefined time. Comparative simulations verify practical predefined-time stability (PPTS) in actuator fault scenarios, along with faster convergence and superior fault tolerance compared to other methods.