Design of longitudinal axis full envelope control law by adaptive backstepping

This paper develops an adaptive backstepping flight control law in order to bestow good handling (or flying) qualities in longitudinal axis for all fight conditions. Using the backstepping procedure, we synthesize a new type of controller in order to accomplish deadbeat responses under a wide range of flight envelope. Adaptive parameters tuning of the backstepping controller is employed to achieve the deadbeat performance for all flight conditions. In comparison with convectional control methods, the proposed control law is much simple and easy to construct and implement. Simulation results demonstrate that the proposed method is capable of giving desired closed-loop deadbeat pitch rate responses within the subsonic and supersonic flight conditions.