A simplified structure for robustness enhancement of time-delay systems

Kenji Natori, Kouhei Ohnishi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

In this paper, we propose a simplified control structure for robustness enhancement of time-delay systems. We have developed a time-delay compensation method based on network disturbance (ND) concept and communication disturbance observer (CDOB). The method effectively compensates time-delay effect and stabilizes time-delay systems. It has been validated that the effectiveness of the time-delay compensation is equivalent to Smith predictor. However, a defect in robustness on model errors has been revealed. Steady-state errors depending on model errors arise in responses. In order to handle the problem, various approaches have been proposed so far. However, sufficient robustness enhancement without degradation of stability and control performance has not been achieved yet. Therefore, this paper proposes a simplified control structure of time-delay systems without CDOB. The proposed structure accomplishes robustness enhancement on model errors without significant degradation of performance. The stability and the transient characteristics are analyzed and the validity is clarified. Then, the effectiveness of the proposed structure is validated by simulation results.

Original languageEnglish
Title of host publicationInternational Workshop on Advanced Motion Control, AMC
Pages512-517
Number of pages6
DOIs
Publication statusPublished - 2010
Event2010 11th IEEE International Workshop on Advanced Motion Control, AMC2010 - Nagaoka, Niigata, Japan
Duration: 2010 Mar 212010 Mar 24

Other

Other2010 11th IEEE International Workshop on Advanced Motion Control, AMC2010
CountryJapan
CityNagaoka, Niigata
Period10/3/2110/3/24

Fingerprint

Time-delay Systems
Model Error
Time delay
Enhancement
Robustness
Disturbance Observer
Time Delay
Degradation
Smith Predictor
Defects
Disturbance
Communication
Sufficient
Simulation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Modelling and Simulation

Cite this

Natori, K., & Ohnishi, K. (2010). A simplified structure for robustness enhancement of time-delay systems. In International Workshop on Advanced Motion Control, AMC (pp. 512-517). [5464077] https://doi.org/10.1109/AMC.2010.5464077

A simplified structure for robustness enhancement of time-delay systems. / Natori, Kenji; Ohnishi, Kouhei.

International Workshop on Advanced Motion Control, AMC. 2010. p. 512-517 5464077.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Natori, K & Ohnishi, K 2010, A simplified structure for robustness enhancement of time-delay systems. in International Workshop on Advanced Motion Control, AMC., 5464077, pp. 512-517, 2010 11th IEEE International Workshop on Advanced Motion Control, AMC2010, Nagaoka, Niigata, Japan, 10/3/21. https://doi.org/10.1109/AMC.2010.5464077
Natori K, Ohnishi K. A simplified structure for robustness enhancement of time-delay systems. In International Workshop on Advanced Motion Control, AMC. 2010. p. 512-517. 5464077 https://doi.org/10.1109/AMC.2010.5464077
Natori, Kenji ; Ohnishi, Kouhei. / A simplified structure for robustness enhancement of time-delay systems. International Workshop on Advanced Motion Control, AMC. 2010. pp. 512-517
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