Robust H∞ decentralized fuzzy tracking control for bank-to-turn missiles

In this paper, a robust H_∞ decentralized fuzzy model reference tracking control design is proposed for bank-to-turn (BTT) missiles with uncertain parameters and external disturbances, where the dynamic model is written as a nonlinear large-scale interconnected system. Initially, a Takagi-Sugeno (T-S) fuzzy model is proposed to represent the nonlinear dynamic model of the BTT missile. Based on the obtained T-S fuzzy model, a decentralized fuzzy controller is subsequently developed to not only ensure the stability of the whole nonlinear interconnected closed-loop system, but also satisfy a desired H_∞ disturbance attenuation constraint. The outcome of the robust H_∞ decentralized fuzzy control problem is characterized in terms of a set of linear matrix inequalities (LMIs). Finally, simulation results on the BTT missile demonstrate the effectiveness of the proposed design method.