Design of robust H∞ fuzzy output feedback controller for affine nonlinear systems: fuzzy Lyapunov function approach Online publication date: Wed, 06-Nov-2019
by Leila Rajabpour; Mokhtar Shasadeghi; Alireza Barzegar
International Journal of Advanced Intelligence Paradigms (IJAIP), Vol. 14, No. 3/4, 2019
Abstract: In this paper, we propose a new systematic approach based on non-quadratic Lyapunov function and technique of introducing slack matrices, for a class of affine nonlinear systems with disturbance. To achieve the goal, first, the affine nonlinear system is represented via Takagi-Sugeno (T-S) fuzzy bilinear model. Subsequently, the robust H∞ controller is designed based on parallel distributed compensation (PDC) scheme. Then, the stability conditions are derived in terms of linear matrix inequalities (LMIs) by utilising Lyapunov function. Moreover, some slack matrices are proposed to reduce the conservativeness of the LMI stability conditions. Finally, for illustrating the merits and verifying the effectiveness of the proposed approach, the application of an isothermal continuous stirred tank reactor (CSTR) for Van de Vusse reactor is discussed in details.
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