Disturbance rejection for time-delay systems based on the equivalent-input-disturbance approache

Rui-Juan Liu, Min Wu*, Zhuo-Yun Nie, G-P Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a disturbance rejection method for time-delay systems. The configuration of the control system is constructed based on the equivalent-input-disturbance (HD) approach. A modified state observer is applied to reconstruct the state of the time-delay plant. A disturbance estimator is designed to actively compensate for the disturbances. Under such a construction of the system, both matched and unmatched disturbances are rejected effectively without requiring any prior knowledge of the disturbance or inverse dynamics of the plant. The presentation of the closed-loop system is derived for the stability analysis and controller design. Simulation results demonstrate the validity and superiority of the proposed method. (C) 2014 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)3364-3377
Number of pages14
JournalJournal of the Franklin Institute
Volume351
Issue number6
DOIs
Publication statusPublished - Jun 2014

Keywords

  • SLIDING MODE CONTROL
  • ROBUST STABILIZATION
  • NONLINEAR-SYSTEMS
  • DEAD-TIME
  • OBSERVER
  • STABILITY

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