Delay-dependent fuzzy H∞ filtering for a class of nonlinear systems with time delays

This paper addresses H_∞ filtering problem for fuzzy dynamical systems with time delays based on Takagi-Sugeno (T-S) model. The main objective is to obtain fuzzy H_∞ filter such that the filtering error system is stable and guarantees a prescribed estimation error level. By use of delay-dependent Lyapunov functional approach, sufficient conditions are derived for the existence of fuzzy H_∞ filter in terms of linear matrix inequalities (LMI). An example is given to illustrate the proposed results.