Robust adaptive optimal tracking design for uncertain missile systems: a fuzzy approach

Abstract

A robust adaptive optimal tracking control design for missile systems with unknown (or uncertain) parameters and external disturbance is proposed in this study, based on adaptive fuzzy technique. An adaptive fuzzy control is equipped with an optimal robust to achieve the desired tracking performance for uncertain missile systems with external disturbance. The design procedure is divided into two steps. First, a fuzzy-based adaptive feedback linearization control scheme is designed to achieve the tracking of unknown (or uncertain) missile systems. Next, a combined optimal robust control scheme is employed to minimize the worst-case effect arising from adaptive fuzzy approximation error and external disturbance to improve the tracking performance of missile. A simulation example of the proposed robust fuzzy-based adaptive tracking control for unknown (or uncertain) bank-to-turn (BTT) missile system is presented to illustrate the tracking performance of the proposed design method.