摘要

The robust H-infinity output feedback controller design problem for uncertain system with time-varying delay in state is considered in this paper. An improved sufficient condition for the existence of robust H-infinity output feedback controller, which ensures the asymptotic stability and a prescribed H-infinity performance level of the closed-loop system, is presented in terms of linear matrix inequality technique. A numerical example is given to illustrate the validity and the less conservation of the obtained method in this paper.