Robust Stabilization of Uncertain Aircraft Active Systems

Abstract

Often, dynamical aircraft systems cannot always be accurate because some approximation assumptions, imprecisions or uncertainties may have been introduced or imposed during the modeling process. Mathematical models of aircraft systems always contain uncertain elements, which model the designer’s lack of knowledge about some parameter values, disturbances and unmodeled dynamics. Using both Lyapunov’s direct method and the linear matrix inequality approach, we develop the controller design procedure, and give a definite feel for stability analysis and robust control for aircraft systems with significant uncertainty. An example of an uncertain thrust vectoring aircraft is studied to illustrate our control design strategy.