Smith system

Abstract: This article has presented a new approach to the analysis and design of Smith-predictor controllers using an equivalent representation of the original Smith system. On this platform, mismatched Smith systems can be analyzed in terms of a single mismatched element, and the single-loop control system becomes a special mismatched Smith system. Furthermore, process modeling identification can be posed as an optimization problem. A counterintuitive phenomenon is also illustrated where a mismatched Smith system may yield a better performance over a perfectly-matched one. The author believes that the proposed platform for the analysis and design of Smith-predictor controllers can churn several research opportunities into improving the performance of the well-known control system