A Novel Predictive Control Scheme with an Enhanced Smith Predictor for Networked Control System

Yanpeng Wu, Ying Wu

Research output: Contribution to journalJournal articleResearchpeer-review

3 Citations (Scopus)

Abstract

This paper presents a novel predictive control scheme with an enhanced Smith predictor for a networked control system with random time delays and system uncertainties. In the scheme, time axis is partitioned into equidistant small intervals to limit the continuous time varying delays into several discrete values. The stability of the networked control system is achieved by establishing an offline database and an online update strategy for Smith predictor, which reduces the reliance on the determined model of delay and system uncertainties in comparison with conventional Smith predictor. In this way, a sequence of finite forward predictive control signals of all possible time delays can be generated in advance and the actual delays will be compensated in real time when achieving the real delay information. Illustrative examples are given to demonstrate the effectiveness and robustness of the proposed predictive methods towards the random transmission delays and system uncertainties integrated in the networked control system.
Original languageEnglish
JournalAutomatic Control and Computer Sciences
Volume52
Pages (from-to)126-134
Number of pages9
ISSN0146-4116
Publication statusPublished - May 2018
Externally publishedYes

Keywords

  • Predictive Control
  • Smith Predictor
  • Robust Control
  • Networked Control System
  • Time Delay

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