A new fuzzy H∞ filter design for nonlinear continuous-time dynamic systems with time-varying delays

This paper focuses on the problem of H-infinity filter design for nonlinear systems with time-varying delays. A new approach of filter design is proposed. The proposed results may improve the existing ones due to estimate the upper bound of the derivative of Lyapunov functional without ignoring some useful terms. A sufficient condition for the existence of such a filter is established by using the linear matrix inequality (LMI) approach. Finally, two examples are given to demonstrate the effectiveness and the benefits of the proposed method. (C) 2009 Elsevier B.V. All rights reserved.