Incipient Fault Detection and Reconstruction Using an Adaptive Sliding-Mode Observer for the Actuators of Fixed-Wing Aircraft

This paper proposes a new method of detection and reconstruction the incipient fault fixed-wing actuators based on an adaptive sliding-mode observer. First, mathematical model aircraft is derived under certain assumptions, considering nonlinear terms system disturbances. Second, by introducing nonsingular coordinate transformation, faults are separated from For subsystem with no disturbances, Luenberger observer can estimate fault. robust against these The Lyapunov stability theory guarantees dynamic error convergence stability. evaluation function was designed to realize residual threshold judgment. Third, concept equivalent output injection, proposed reconstruct actuator precisely condition uncertain structure. design steps introduced in form linear matrix inequality problem, which provides effective for calculating parameters. Finally, simulation results De Havilland DHC-2 “Beaver” demonstrate correctness effectiveness method.