Resilient Switching Control of the Tilt-Rotor Aircraft Based on the Disturbance Observer

Aiming at the problem of external composite disturbance in the conversion flight mode of the tilt-rotor aircraft, a robust resilient switching flight control scheme based on the disturbance observer is developed. First of all, the linear longitudinal kinematic switching model of the aircraft is given, and the switching rule based on the average dwell time is designed. Then, the external disturbance is compensated by the designed disturbance observer, the H∞ control method is used to suppress the energy-bounded disturbance. In addition, the non-fragile control method is introduced to reduce the effect of controller gain perturbations. With the Lyapunov function, the controller gains are solved by the linear matrix inequality toolbox. Finally, the simulation results demonstrate the effectiveness of the proposed method.