The effect of structural-acoustic coupling on the active control of noise in vehicles
The effect of structural-acoustic coupling on the active control of noise in vehicles
Active noise control systems offer a potential method of reducing the weight of passive acoustic treatment and, therefore, increasing vehicles’ fuel efficiency. These can be particularly cost-efficient if integrated with the entertainment system. A combined system is presented employing feedforward control of engine noise and feedback control of road noise, using a ‘modal’ error signal. Due to the dependence of the feedback system on the modal response of the vehicle cabin, and the influence of structural-acoustic coupling on this response, the effects of structural-acoustic coupling upon the performance of the active noise control strategies is investigated. An elemental model of structural-acoustic coupling is derived and used to simulate the change in performance of the active control systems as a result of coupling; the feedforward component is largely unaffected by structural-acoustic coupling, whilst the modal feedback performance is reduced from 11 to 8 dB attenuation in total acoustic potential energy, due to the shift in the frequency of the targeted acoustic mode. The simulation results are confirmed through experiments conducted in a structural-acoustic coupled enclosure.
978-90-760-1931-4
3206-3213
European Association for Structural Dynamics
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
July 2011
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, Jordan and Elliott, Stephen J.
(2011)
The effect of structural-acoustic coupling on the active control of noise in vehicles.
De Roeck, G., Degrande, G., Lombaert, G. and Müller, G.
(eds.)
In Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011.
European Association for Structural Dynamics.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Active noise control systems offer a potential method of reducing the weight of passive acoustic treatment and, therefore, increasing vehicles’ fuel efficiency. These can be particularly cost-efficient if integrated with the entertainment system. A combined system is presented employing feedforward control of engine noise and feedback control of road noise, using a ‘modal’ error signal. Due to the dependence of the feedback system on the modal response of the vehicle cabin, and the influence of structural-acoustic coupling on this response, the effects of structural-acoustic coupling upon the performance of the active noise control strategies is investigated. An elemental model of structural-acoustic coupling is derived and used to simulate the change in performance of the active control systems as a result of coupling; the feedforward component is largely unaffected by structural-acoustic coupling, whilst the modal feedback performance is reduced from 11 to 8 dB attenuation in total acoustic potential energy, due to the shift in the frequency of the targeted acoustic mode. The simulation results are confirmed through experiments conducted in a structural-acoustic coupled enclosure.
Text
MS21-1274.pdf
- Version of Record
More information
Published date: July 2011
Organisations:
Signal Processing & Control Grp
Identifiers
Local EPrints ID: 352334
URI: http://eprints.soton.ac.uk/id/eprint/352334
ISBN: 978-90-760-1931-4
PURE UUID: 77cf6774-3d71-4a57-ab97-90dc3e01e349
Catalogue record
Date deposited: 09 May 2013 14:02
Last modified: 15 Mar 2024 03:37
Export record
Contributors
Editor:
G. De Roeck
Editor:
G. Degrande
Editor:
G. Lombaert
Editor:
G. Müller
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
