Abstract:

In accordance with the requirements for robustness of the control system and accuracy of tracking optimal project trajectory in the scheduled wings’ configuration schemes, an adaptive sliding-mode controller is proposed. The final controller is an inner/outer-loop structure, with trajectory tracking control being the outer loop and attitude tracking control being the inner loop. The outer loop uses position deviations as reference inputs to obtain the reference angle-of-attack command. The sufficient condition of converging to a sliding mode area is obtained based on the Lyapunov stability theory. The inner loop is designed with the parametric adaptation law to restrain the time-varying parameter perturbations caused by the sweepback,and produce the rudder deflection commands in order to realize the attitude tracking control. Simulation results indicate that the proposed controller can eliminate the effect from time-varying parameter uncertainties and maintain the stability of tracking optimal project trajectory simultaneously, with no control chattering.