Longitudinal Axis Flight Control Law Design by Adaptive Backstepping

Authors:	Ju Hann-Shing, National Chung-Hsing University, Taiwan Tsai Ching-Chih, National Chung-Hsing University, Taiwan
Topic:	7.3 Aerospace
Session:	Aircraft Control Design
Keywords:	Adaptation, flight control, integral action, Lyapunov stability, robustness.

Abstract

This paper develops an adaptive backstepping flight control law in order to bestow good handling (or flying) qualities in longitudinal axis for all flight conditions. Using the backstepping procedure, a new type of controller was synthesized in order to accomplish desired responses under a wide range of flight envelope. Model-reference tuning of the backstepping controller is employed to achieve the desired responses for all flight conditions. Simulation results demonstrate that the proposed method is capable of giving desired closed-loop dynamic performance and robustness against uncertainties within the subsonic and supersonic flight conditions.