A new T-S fuzzy tracking controller for uncertain and disturbed nonlinear NCSs with H∞ criterion based observer

This paper investigates the fuzzy tracking control problem for a class of uncertain nonlinear networked control systems (NCSs), which can be represented by a T-S fuzzy model with external disturbances. In transmission both network-induced delay and packet dropout are considered. The control scheme is based on the parallel distributed compensation (PDC) structure, a fuzzy observer and H_∞ performance to attenuate the external disturbances; the stability of the whole closed-loop model is provided using a general Lyapunov-Krasovskii functional. The key point of the proposed approaches is to achieve conditions under a linear matrix inequalities (LMI) formulation. Finally, numerical examples and simulation results are given to illustrate the effectiveness of the method.