Please use this identifier to cite or link to this item:
Title: Active control of flow-induced acoustic resonance through surface perturbation
Authors: Lu, Z
Cheng, L 
Halim, D
Keywords: Acoustic resonance
Closed-loop control
Open-loop control
Surface perturbation
Issue Date: 2010
Source: 39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, 2010, v. 6, p. 4678-4687 How to cite?
Abstract: Flow-induced acoustic resonance inside downstream cavities was experimentally investigated. A controllable motion was imposed on the surface of an upstream vortex generator using embedded piezoceramic actuators. Experiments were conducted by using both open-loop and closed-loop control. Open-loop tests show that there was an optimum control frequency and control voltage which led to a significant reduction in the strength of the flow-induced acoustic resonance. This was directly resulted not only from an impairment of the vortex shedding strength, but also from a shift in the shedding frequency created by the control action. Due to the practical limitation of the actuators, closed-loop control based on the downsampled feedback signals was implemented and tested. A downsampling procedure for reconstructing the feedback signals was investigated. Performance of the closed-loop control was then assessed. Analyses were carried out to reveal the effects of the feedback gain and phase delay on the control performance.
Description: 39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010, Lisbon, 13-16 June 2010
ISBN: 9781617823961
Appears in Collections:Conference Paper

View full-text via PolyU eLinks SFX Query
Show full item record

Page view(s)

Last Week
Last month
Citations as of Jul 16, 2018

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.