Modeling and control of flow-induced vibrations of a flexible hydrofoil in viscous flow

Ryan James Caverly, Chenyang Li, Eun Jung Chae, James Richard Forbes, Yin Lu Young

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this paper, a reduced-order model (ROM) of the flow-induced vibrations of a flexible cantilevered hydrofoil is developed and used to design an active feedback controller. The ROM is developed using data from high-fidelity viscous fluid-structure interaction (FSI) simulations and includes nonlinear terms to accurately capture the effect of lock-in. An active linear quadratic Gaussian (LQG) controller is designed based on a linearization of the ROM and is implemented in simulation with the ROM and the high-fidelity viscous FSI model. A controller saturation method is also presented that ensures that the control force applied to the system remains within a prescribed range. Simulation results demonstrate that the LQG controller successfully suppresses vibrations in both the ROM and viscous FSI simulations using a reasonable amount of control force.

Original languageEnglish (US)
Article number065007
JournalSmart Materials and Structures
Volume25
Issue number6
DOIs
StatePublished - May 11 2016
Externally publishedYes

Keywords

  • active control
  • flow-induced vibrations
  • fluid-structure interaction
  • linear quadratic Gaussian control
  • reduced-order model
  • vibration supression
  • viscous flow

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