Control of vibration in a plate using active acoustic black holes
Control of vibration in a plate using active acoustic black holes
Acoustic Black Holes (ABHs) are structural features that can be embedded into plates to provide effective structural damping. However, the performance of an embedded ABH is limited by its size, which determines the ABH cut-on frequency. It is not always practicable to increase the size of an ABH to reduce its cut-on frequency, however, previous work has shown that active vibration control can instead be used to enhance the low frequency performance of an ABH beam termination. This paper presents an investigation into the potential performance benefits that can be achieved by implementing active control into an array of ABHs embedded in a plate, realising an array of active ABHs (AABHs). The potential performance advantage is investigated here through experimental investigations, where different configurations of passive and active control treatments are applied to both a plate with embedded ABHs and a constant thickness plate. The smart structures utilise piezoelectric patches to realise the control actuation and employ an active feedforward multichannel vibration control strategy that aims to minimise the structural response monitored by an array of accelerometers. The performance of each plate configuration is evaluated in terms of the attenuation in the structural response and the energy, or control effort required. The presented experimental results demonstrate that, compared to the constant thickness plate configuration, the AABHs provide considerable passive damping above the ABH cut-on frequency and significantly reduce the required control effort.
acoustic black hole, active vibration control, piezoelectric
Hook, Kristian
6c9b8a1f-84fe-4560-9138-89cf5e8f4c4b
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
March 2022
Hook, Kristian
6c9b8a1f-84fe-4560-9138-89cf5e8f4c4b
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Hook, Kristian, Cheer, Jordan and Daley, Stephen
(2022)
Control of vibration in a plate using active acoustic black holes.
Smart Materials and Structures, 31 (3), [035033].
(doi:10.1088/1361-665X/ac51ae).
Abstract
Acoustic Black Holes (ABHs) are structural features that can be embedded into plates to provide effective structural damping. However, the performance of an embedded ABH is limited by its size, which determines the ABH cut-on frequency. It is not always practicable to increase the size of an ABH to reduce its cut-on frequency, however, previous work has shown that active vibration control can instead be used to enhance the low frequency performance of an ABH beam termination. This paper presents an investigation into the potential performance benefits that can be achieved by implementing active control into an array of ABHs embedded in a plate, realising an array of active ABHs (AABHs). The potential performance advantage is investigated here through experimental investigations, where different configurations of passive and active control treatments are applied to both a plate with embedded ABHs and a constant thickness plate. The smart structures utilise piezoelectric patches to realise the control actuation and employ an active feedforward multichannel vibration control strategy that aims to minimise the structural response monitored by an array of accelerometers. The performance of each plate configuration is evaluated in terms of the attenuation in the structural response and the energy, or control effort required. The presented experimental results demonstrate that, compared to the constant thickness plate configuration, the AABHs provide considerable passive damping above the ABH cut-on frequency and significantly reduce the required control effort.
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Hook_et_al_2022
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More information
Accepted/In Press date: 2 February 2022
e-pub ahead of print date: 3 February 2022
Published date: March 2022
Additional Information:
Funding Information:
This work was supported by an EPSRC iCASE studentship (Voucher Number 16000058) and the Intelligent Structures for Low Noise Environments (ISLNE) EPSRC Prosperity Partnership (EP/S03661X/1).
Publisher Copyright:
© 2022 The Author(s). Published by IOP Publishing Ltd.
Keywords:
acoustic black hole, active vibration control, piezoelectric
Identifiers
Local EPrints ID: 454888
URI: http://eprints.soton.ac.uk/id/eprint/454888
ISSN: 0964-1726
PURE UUID: 82707e0f-427d-42c4-af43-ff577cc8ff47
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Date deposited: 01 Mar 2022 17:36
Last modified: 09 Aug 2024 01:45
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Author:
Kristian Hook
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