The University of Southampton
University of Southampton Institutional Repository

Active control of buzz-saw tones: experimental results from a laboratory - scale rig

Active control of buzz-saw tones: experimental results from a laboratory - scale rig
Active control of buzz-saw tones: experimental results from a laboratory - scale rig
This paper details the results of an experiment on a small scale no-flow rig to control a spinning mode with similar characteristics to the modes gen erated by buzz-saw noise. The spinning mode (m = ?3, n = 1) is generate by a mode synthesiser ring which has similar characteristics to that of a low frequency Buzz-saw mode. A control system using seven microphones an seven control actuators is used to minimise the sum of the squared pressure at the duct wall using a Filtered reference Least Mean Squares (FXLMS algorithm). It is shown that at certain frequencies the sound power transmitted to the duct termination is reduced by 14.5dB. The control mechanism at different fequency ranges are identified and discussed with reference to computer simulations. It is shown that cut-off modes excited by the secondary actuator array have a significant effect on control performance a frequencies close to the cut-on frequency of the (m = ?4, n = 1) mode.
Wilkinson, M.J.
6c1b6e22-9111-404b-b36d-0f7a815ee226
Joseph, P.F.
49d48c71-47fb-49e7-b15b-bb1a78e39139
Wilkinson, M.J.
6c1b6e22-9111-404b-b36d-0f7a815ee226
Joseph, P.F.
49d48c71-47fb-49e7-b15b-bb1a78e39139

Wilkinson, M.J. and Joseph, P.F. (2005) Active control of buzz-saw tones: experimental results from a laboratory - scale rig. 11th AIAA/CEAS Aeroacoustics Conference, Monterey, California, USA, 23-25 May 2005. 23 - 25 May 2005. 16 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper details the results of an experiment on a small scale no-flow rig to control a spinning mode with similar characteristics to the modes gen erated by buzz-saw noise. The spinning mode (m = ?3, n = 1) is generate by a mode synthesiser ring which has similar characteristics to that of a low frequency Buzz-saw mode. A control system using seven microphones an seven control actuators is used to minimise the sum of the squared pressure at the duct wall using a Filtered reference Least Mean Squares (FXLMS algorithm). It is shown that at certain frequencies the sound power transmitted to the duct termination is reduced by 14.5dB. The control mechanism at different fequency ranges are identified and discussed with reference to computer simulations. It is shown that cut-off modes excited by the secondary actuator array have a significant effect on control performance a frequencies close to the cut-on frequency of the (m = ?4, n = 1) mode.

Full text not available from this repository.

More information

Published date: 2005
Additional Information: AIAA 2005-3074
Venue - Dates: 11th AIAA/CEAS Aeroacoustics Conference, Monterey, California, USA, 23-25 May 2005, 2005-05-23 - 2005-05-25

Identifiers

Local EPrints ID: 28382
URI: https://eprints.soton.ac.uk/id/eprint/28382
PURE UUID: 29612fc9-d670-44e8-93e8-a795c1c54bc6

Catalogue record

Date deposited: 02 May 2006
Last modified: 15 Jul 2019 19:10

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×