Robust disturbance rejection based on equivalent-input-disturbance approach

Rui-Juan Liu*, Guo-Ping Liu, Min Wu, Fang-Chun Xiao, Jinhua She

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A robust disturbance rejection method for uncertain systems is presented in this study. It effectively rejects both matched and unmatched disturbances and guarantees robust stability of the system when there exist modelling uncertainties. First, the authors show the configuration of the system that is based on the idea of the equivalent input disturbance (EID). An EID estimator is designed to compensate disturbances without requiring their prior knowledge. Then, a robust stability condition and the method of the controller design are presented using a linear-matrix-inequality. Finally, the validity of the authors method and its superiority over a conventional control method and the sliding-mode control method are demonstrated through the simulations of a numerical example and experiments of a rotational-speed control system.

Original languageEnglish
Pages (from-to)1261-1268
Number of pages8
JournalIet control theory and applications
Volume7
Issue number9
DOIs
Publication statusPublished - Jun 2013
Externally publishedYes

Keywords

  • UNCERTAIN LINEAR-SYSTEMS
  • SLIDING MODE CONTROL
  • OBSERVER DESIGN
  • STABILIZATION
  • PERFORMANCE
  • DELAY

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