Output tracking control for discrete-time networked control systems

This paper studies the problem of H∞ output tracking control for discrete-time networked control systems (NCSs) with and without parameter uncertainty. By defining new Lyapunov function and using the discrete Jensen inequality, linear matrix inequality (LMI)-based H∞ output tracking performance analysis and controller design are presented, and the merit of the proposed methods lies in their less conservativeness, which is achieved by decoupling the Lyapunov and the system matrices. The designed controllers can guarantee asymptotic tracking of prescribed reference outputs while rejecting disturbances. The simulation results illustrate the effectiveness of the proposed H∞ output tracking performance analysis and controller design.