Optimally controlled anti-swirl injection to eliminate whirl in fluid-film bearings of rotary machinery

Duc Do Le, Ching Kuan Tsuei, Min Chun Pan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The phenomenon of fluid-induced instability existing in fluid-film bearing systems has been coped with for long time. The study aims to soothe and even eliminate the occurrence of whirl in rotary machinery by increasing the threshold of instability through the anti-swirl injection using the linear quadratic regulator based optimal control. An acceptance region was established in order to decide starting up the control process. Three case studies were carried out to illustrate the effectiveness of the control scheme. The research results demonstrate that the control scheme incorporating with the acceptance region enables to avoid the occurrence of fluid induced instability in rotary machinery. Moreover, the developed techniques can also be applied in other fluid-induced instability problems such as whip and rub, etc.

Original languageEnglish
Pages (from-to)157-168
Number of pages12
JournalInternational Journal of Mechanical Sciences
Volume98
DOIs
StatePublished - 16 May 2015

Keywords

  • Acceptance region
  • Fluid-induced instability
  • Linear quadratic regulator
  • Whirl

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