Linear and nonlinear active feedback controls for vortex-induced vibrations of circular cylinders

A. Mehmood, A. Abdelkefi, I. Akhtar, A. H. Nayfeh, A. Nuhait, M. R. Hajj

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

We consider the problem of suppressing oscillations of an elastically mounted rigid cylinder undergoing vortex-induced vibrations by linear and nonlinear active velocity feedback controllers. Each controller relies on an actuator, which imparts an opposing force to the cylinder motion, thereby reducing its high-amplitude oscillations. A strongly coupled fluid-structure numerical model is used to solve the fluid-structure interaction equations. The results show that the choice of the active feedback controller depends on the allowable controlled amplitude of the cylinder. It is found that a cubic velocity feedback controller is more efficient than its linear velocity counterpart when very small controlled amplitudes are desired.

Original languageEnglish
Pages (from-to)1137-1147
Number of pages11
JournalJVC/Journal of Vibration and Control
Volume20
Issue number8
DOIs
StatePublished - Jun 2014

Keywords

  • Circular cylinder
  • Computational fluid dynamics
  • Control
  • Synchronization
  • Vortex-induced vibration

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