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Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates

Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates
Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates
Active Structural Acoustic Control (ASAC) is mostly performed using a passive noise barrier, vibration actuators, sensors and a control system. ASAC reduces or alters the vibration of the barrier structure in a way that blocks the noise propagation through it. However, it is crucial that the actuators are appropriately arranged to be able to effectively control the vibration of the barrier. If the actuators were not optimally arranged, then certain modes of the structure may be uncontrollable, or require a very high control effort. Hence, the locations of the actuators should be determined by a careful optimization process employing a model of the structure. A common approach is to maximize the controllability of the system over a defined frequency range of operation. However, such an optimisation procedure often results in a solution that considers numerous vibration modes, only some of which are acoustically-relevant. That is, certain structural modes may vibrate considerably, but their contribution to the noise transmission and radiation would be negligible. Therefore, in the presented research a new acoustic radiation-based approach to the optimisation of the arrangement of actuators is proposed. A model of acoustic radiation is introduced and new cost functions are formulated to focus on modes that strongly contribute to noise transmission or radiation by the noise barrier. For the considered system, this enables an increase in the controllability measure of more than 5 dB for acoustically-relevant modes, which is similar to the level of improvement achieved when the number of actuators is doubled.
Acoustic radiation, Actuators arrangement, Mathematical modelling, Noise control, Noise reduction, Optimization process
0888-3270
1-18
Wrona, Stanislaw
cbc680a2-69b2-4d8d-b48a-5cd2e9889dd4
Pawelczyk, Marek
1e2ede6b-d151-44fd-b389-b4f74fdeb035
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Wrona, Stanislaw
cbc680a2-69b2-4d8d-b48a-5cd2e9889dd4
Pawelczyk, Marek
1e2ede6b-d151-44fd-b389-b4f74fdeb035
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc

Wrona, Stanislaw, Pawelczyk, Marek and Cheer, Jordan (2021) Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates. Mechanical Systems and Signal Processing, 147, 1-18, [107009]. (doi:10.1016/j.ymssp.2020.107009).

Record type: Article

Abstract

Active Structural Acoustic Control (ASAC) is mostly performed using a passive noise barrier, vibration actuators, sensors and a control system. ASAC reduces or alters the vibration of the barrier structure in a way that blocks the noise propagation through it. However, it is crucial that the actuators are appropriately arranged to be able to effectively control the vibration of the barrier. If the actuators were not optimally arranged, then certain modes of the structure may be uncontrollable, or require a very high control effort. Hence, the locations of the actuators should be determined by a careful optimization process employing a model of the structure. A common approach is to maximize the controllability of the system over a defined frequency range of operation. However, such an optimisation procedure often results in a solution that considers numerous vibration modes, only some of which are acoustically-relevant. That is, certain structural modes may vibrate considerably, but their contribution to the noise transmission and radiation would be negligible. Therefore, in the presented research a new acoustic radiation-based approach to the optimisation of the arrangement of actuators is proposed. A model of acoustic radiation is introduced and new cost functions are formulated to focus on modes that strongly contribute to noise transmission or radiation by the noise barrier. For the considered system, this enables an increase in the controllability measure of more than 5 dB for acoustically-relevant modes, which is similar to the level of improvement achieved when the number of actuators is doubled.

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Accepted/In Press date: 27 May 2020
e-pub ahead of print date: 7 July 2020
Published date: 15 January 2021
Keywords: Acoustic radiation, Actuators arrangement, Mathematical modelling, Noise control, Noise reduction, Optimization process

Identifiers

Local EPrints ID: 441156
URI: http://eprints.soton.ac.uk/id/eprint/441156
ISSN: 0888-3270
PURE UUID: eb49efa0-0d65-4227-9261-c5fb9437b096
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 03 Jun 2020 16:31
Last modified: 17 Mar 2024 05:36

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Contributors

Author: Stanislaw Wrona
Author: Marek Pawelczyk
Author: Jordan Cheer ORCID iD

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