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Active structural acoustic control of a flat plate using an experimentally identified radiation resistance matrix

Active structural acoustic control of a flat plate using an experimentally identified radiation resistance matrix
Active structural acoustic control of a flat plate using an experimentally identified radiation resistance matrix
Active Structural Acoustic Control (ASAC) is a widely used active noise control technique, which provides global control of structurally radiated noise by controlling structural vibrations. Many current ASAC systems rely upon the availability of an accurate, real-time measure of the radiated sound field. This often requires positioning of acoustic error sensors in the radiated sound field, which for many practical setups may not always be possible. Previous research has investigated the implementation of ASAC using structural measurements that can be related to the radiated noise. One such method employs the use of the radiation resistance matrix to estimate the radiated sound power from structural measurements. However, estimation of the radiation resistance matrix has generally relied upon precise modelling of the radiating structure which, for practical structures, can lead to limitations in the accuracy of the estimate. To overcome this problem, this paper presents an ASAC system that utilises an experimentally identified radiation resistance matrix. It is shown via real-time implementation of the proposed strategy for a flat plate, that the proposed ASAC system is effective at controlling structurally radiated noise and out performs an Active Vibration Control (AVC) system using identical hardware. At the first three radiating modes, the proposed method achieves 9, 9 and 23 dB more attenuation in the radiated sound power than AVC.
Milton, Joseph
857240aa-05e9-441c-a5f3-5e21e2b7ee48
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Steve
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Milton, Joseph
857240aa-05e9-441c-a5f3-5e21e2b7ee48
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Steve
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6

Milton, Joseph, Cheer, Jordan and Daley, Steve (2019) Active structural acoustic control of a flat plate using an experimentally identified radiation resistance matrix. 26th International Congress on Sound and Vibration, Montreal, Canada. 07 - 11 Jul 2019. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Active Structural Acoustic Control (ASAC) is a widely used active noise control technique, which provides global control of structurally radiated noise by controlling structural vibrations. Many current ASAC systems rely upon the availability of an accurate, real-time measure of the radiated sound field. This often requires positioning of acoustic error sensors in the radiated sound field, which for many practical setups may not always be possible. Previous research has investigated the implementation of ASAC using structural measurements that can be related to the radiated noise. One such method employs the use of the radiation resistance matrix to estimate the radiated sound power from structural measurements. However, estimation of the radiation resistance matrix has generally relied upon precise modelling of the radiating structure which, for practical structures, can lead to limitations in the accuracy of the estimate. To overcome this problem, this paper presents an ASAC system that utilises an experimentally identified radiation resistance matrix. It is shown via real-time implementation of the proposed strategy for a flat plate, that the proposed ASAC system is effective at controlling structurally radiated noise and out performs an Active Vibration Control (AVC) system using identical hardware. At the first three radiating modes, the proposed method achieves 9, 9 and 23 dB more attenuation in the radiated sound power than AVC.

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Published date: July 2019
Venue - Dates: 26th International Congress on Sound and Vibration, Montreal, Canada, 2019-07-07 - 2019-07-11

Identifiers

Local EPrints ID: 434421
URI: http://eprints.soton.ac.uk/id/eprint/434421
PURE UUID: 70176a9b-99c7-4a6e-92cd-1b8191e39899
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 23 Sep 2019 16:30
Last modified: 05 Nov 2019 01:41

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