A modified structure for robustness enhancement of time-delay systems with communication disturbance observer

Kenji Natori, Kouhei Ohnishi

Research output: Contribution to conferencePaper

4 Citations (Scopus)

Abstract

This paper presents a modified structure for robustness enhancement of time-delay systems with communication disturbance observer (CDOB). A time-delay compensation method based on network disturbance (ND) concept and CDOB has been proposed and applied to various time-delay systems. The effectiveness is the same as Smith predictor. In addition, it works even when the value of time delay is unknown, since the method compensates time-delay effects without time-delay models. However, it has a problem of the robustness on system model errors. In case there are model errors of the system, serious steady-state error occurs. In this paper, a modified structure that enhances the robustness of time-delay systems with CDOB is proposed. The structure enhances the robustness and achieves zero steady-state error. The effectiveness of the proposed structure is presented by a case study of a time-delayed motor control system. In addition, this paper addresses stability and transient characteristics of the proposed structure.

Original languageEnglish
Pages2969-2974
Number of pages6
DOIs
Publication statusPublished - 2009 Dec 1
Event35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009 - Porto, Portugal
Duration: 2009 Nov 32009 Nov 5

Other

Other35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009
CountryPortugal
CityPorto
Period09/11/309/11/5

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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    Natori, K., & Ohnishi, K. (2009). A modified structure for robustness enhancement of time-delay systems with communication disturbance observer. 2969-2974. Paper presented at 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal. https://doi.org/10.1109/IECON.2009.5415382