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Active structural acoustic control using an experimentally identified radiation resistance matrix

Active structural acoustic control using an experimentally identified radiation resistance matrix
Active structural acoustic control using an experimentally identified radiation resistance matrix
Active Structural Acoustic Control (ASAC) is a widely used active noise control technique, which provides control of structurally radiated noise through actuation of the radiating structure. Typically, ASAC drives structural actuators to minimise a real-time measurement of the radiated sound field. However, it is often not practical to position error microphones in the radiated sound field. To overcome this limitation, a number of methods have previously been proposed. One such method utilises the radiation resistance matrix to map structural response measurements to the acoustic response, and thus enable an estimate of the structurally radiated sound power from structural measurements alone. This has previously relied upon precise modelling of the radiating structure which, for practical structures, can lead to limitations in the accuracy of the estimate. In this paper, an ASAC strategy that utilises an experimentally identified radiation resistance matrix is presented. The robustness of both the sound power estimation and the ASAC controller to system uncertainties is investigated and it has been shown that the proposed ASAC strategy is able to achieve effective control of the radiated sound power.
0001-4966
1459-1468
Milton, Joseph
73a8f6ca-8a5b-4298-91b6-90325111951a
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Steve
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Milton, Joseph
73a8f6ca-8a5b-4298-91b6-90325111951a
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Steve
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6

Milton, Joseph, Cheer, Jordan and Daley, Steve (2020) Active structural acoustic control using an experimentally identified radiation resistance matrix. Journal of the Acoustical Society of America, 147 (3), 1459-1468. (doi:10.1121/10.0000858).

Record type: Article

Abstract

Active Structural Acoustic Control (ASAC) is a widely used active noise control technique, which provides control of structurally radiated noise through actuation of the radiating structure. Typically, ASAC drives structural actuators to minimise a real-time measurement of the radiated sound field. However, it is often not practical to position error microphones in the radiated sound field. To overcome this limitation, a number of methods have previously been proposed. One such method utilises the radiation resistance matrix to map structural response measurements to the acoustic response, and thus enable an estimate of the structurally radiated sound power from structural measurements alone. This has previously relied upon precise modelling of the radiating structure which, for practical structures, can lead to limitations in the accuracy of the estimate. In this paper, an ASAC strategy that utilises an experimentally identified radiation resistance matrix is presented. The robustness of both the sound power estimation and the ASAC controller to system uncertainties is investigated and it has been shown that the proposed ASAC strategy is able to achieve effective control of the radiated sound power.

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Accepted/In Press date: 19 February 2020
e-pub ahead of print date: 5 March 2020
Published date: 5 March 2020

Identifiers

Local EPrints ID: 438706
URI: http://eprints.soton.ac.uk/id/eprint/438706
ISSN: 0001-4966
PURE UUID: fc00e681-a61b-4f2d-822d-b426cf1d327e
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 23 Mar 2020 17:30
Last modified: 07 Oct 2020 01:58

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Contributors

Author: Joseph Milton
Author: Jordan Cheer ORCID iD
Author: Steve Daley

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