Improved delay-dependent stability criteria for networked control systems

This paper is concerned with robust H∞ control of uncertain networked control systems with interval time-varying delay and packet dropout. For less conservative transformation, we propose a new integral inequality by dividing time interval into two subintervals and defining an appropriate scalar instead of introducing free weighting matrix. Based on this integral inequality, a new delay-dependent stability criteria for the systems are obtained by solving a convex domain. Moreover, we may obtain the feasible solutions by solving a minimization problem in terms of linear matrix inequalities. Finally numerical examples are used to illustrate the effectiveness and validity of the proposed methods.