Delay-Dependent H/spl infin/ filtering for Uncertain Time Delay Nonlinear Systems: An LMI Approach

This paper considers the problem of designing a delay-dependent robust H_infin filter for time delay Takagi-Sugeno fuzzy models. The purpose of this paper is to design delay-dependent H_infin filters ensuring a prescribed H_infin performance level for the estimation error, irrespective of the uncertainties and the time delays. Sufficient conditions for the existence of a delay-dependent H_infin filter are given in terms of linear matrix inequalities. Membership functions´ (MFs) structural information is incorporated into the delay dependent filter design to reduces the conservativeness of neglecting this information. Both full and reduced order delay dependent H_infin filters are presented