Abstract
A mixed H-2/H-infinity output-feedback control design methodology is presented in this paper for second-order neutral linear systems with time-varying state and input delays. Delay-dependent sufficient conditions for the design of a desired control are given in terms of linear matrix inequalities (LMIs). A controller, which guarantees asymptotic stability and a mixed H-2/H-infinity performance for the closed-loop system of the second-order neutral linear system, is then developed directly instead of coupling the model to a first-order neutral system. A Lyapunov-Krasovskii method underlies the LMI-based mixed H-2/H-infinity output-feedback control design using some free weighting matrices. The simulation results illustrate the effectiveness of the proposed methodology. (C) 2008, ISA. Published by Elsevier Ltd. All rights reserved.