Modification of Smith Predictor for a Linear Plant with Changeable Parameters
Abstract
Introduction: The Smith predictor is an effective tool for the control over systems with delays, but its use requires an accurate evaluation of the parameters of the controlled plant. For plants with changeable parameters, an additional adaptation loop should be introduced into the structure of the Smith predictor. Purpose: The goal of this study is to develop a modification of the Smith predictor that allows you to operate with a changeable gain ratio of the controlled plant described by its transfer function. Results: Various options have been considered in order to build a Smith predictor adaptation loop: based on the MIT rule, on Lyapunov functions, or on a linear PID controller and an adaptive controller with a reference model which uses the closed system sensitivity functions relative to the PID parameters. On the base of computer experiments, we have substantiated the choice of an adaptation loop which would ensure Smith predictor operation when the transfer function of the controlled plant is changing. Practical relevance: The Smith predictor adaptation algorithm proposed in this paper can be implemented in control systems for objects with delays.Published
2017-08-21
How to Cite
Burakov, M., & Konovalov, A. (2017). Modification of Smith Predictor for a Linear Plant with Changeable Parameters. Information and Control Systems, (4), 25-34. https://doi.org/10.15217/issn1684-8853.2017.4.25
Issue
Section
Information and control systems