Abstract
This work proposes a closed-loop control of vortex-induced vibrations on a flexibly supported square cylinder. One side of the cylinder was perturbed using actuators, which were controlled by a proportional-integral-derivative controller with its feedback signal provided by a hot wire placed in the near wake. The particle image velocimetry, hot wire and laser vibrometer measurements indicate that the perturbation has completely modified the fluid-structure interaction, drastically impairing the resonance between vortex shedding and vortex-induced structural vibration. Compared with an open-loop control, the closed-loop control has two advantages. Firstly, the perturbation amplitude required to suppress vortex shedding/structural vibration is reduced by about 70%. Secondly, the closed-loop control always suppresses vortex shedding/structural vibration, while an open loop may, or may not, depending on the relationship between the vortex shedding and perturbation frequencies.
Original language | English |
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Pages (from-to) | 189-197 |
Number of pages | 9 |
Journal | European Journal of Mechanics, B/Fluids |
Volume | 23 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2004 |
Event | Bluff Body Wakes and Vortex-Induced Vibrations - Port Douglas, Australia Duration: 17 Dec 2002 → 20 Dec 2002 |
Keywords
- Closed-loop control
- PID controller
- Vortex-induced vibration
- Wake
ASJC Scopus subject areas
- Mathematical Physics
- General Physics and Astronomy