Novel ODE-type nonlinear Smith predictor for networked control systems

This paper discusses the stability analysis of networked control systems (NCSs) with transmission delays. In an NCS, the presence of time delays in the transmission may severely affect the performance of the closed-loop system and prevent the successful application of established nonlinear control methodologies. First, we present the backstepping interpretation of Smith predictors for linear time-variant systems in the state space. Second, we present a design and stability analysis for the control of a nonlinear Smith predictor and propose a new control scheme. The Smith predictor provides a set of future control predictions to make the closed-loop system achieve the desired control performance.