Passive control of transonic flutter with a nonlinear energy sink

Zhimiao Yan, Saad A. Ragab, Muhammad R. Hajj

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Among different control approaches, the nonlinear energy sink has been proposed as an effective strategy for passive flutter control toward expanding the flight envelope of aircraft. We validate and introduce the capability for coupling the NES within OpenFOAM to simulate and evaluate its usability in controlling transonic flutter. Particular attention is paid to the extent to which variations in the parameters of the sink impact regions of complete and partial suppression. The results show that in the region of complete suppression the nonlinear energy sink may cause the wing to assume a new equilibrium position, in terms of mean value of the oscillations. In the region of partial suppression, the response is dependent on the initial conditions that may lead to multiple pitch and plunge frequencies or potentially a chaotic response.

Original languageEnglish
Pages (from-to)577-590
Number of pages14
JournalNonlinear Dynamics
Volume91
Issue number1
DOIs
StatePublished - 1 Jan 2018

Keywords

  • Nonlinear energy sink
  • Passive control
  • Transonic flutter

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