Adaptive Super-twisting Sliding Mode Fault Tolerant Control for MIMO Uncertain Aircraft System

In this paper, a nonlinear adaptive super-twisting sliding mode fault tolerant controller is proposed for an uncertain MIMO aircraft system in the present of actuator malfunctions. The dynamics of aircraft attitude motion are divided into outerloop subsystem and inner-loop subsystem. On this basis, the controllers are designed respectively to ensure the finite-time convergence. Through the online adaptive adjustment for system disturbances and uncertainties cased by actuator faults, the adaptive sliding mode controller implements the output stable tracking when considering that the bounds of uncertainty and perturbation are not known. Simulation studies verify the effectiveness of the proposed approach.