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Feedback active control using an acoustic black hole

Feedback active control using an acoustic black hole
Feedback active control using an acoustic black hole
Acoustic black holes (ABHs) are tapered structural features that can achieve high levels of structural damping within lightweight constraints. It has previously been proposed to integrate feedforward active vibration control into an ABH to enable control over a broad spectrum, however, the time advance information required in this control strategy is not always available. Therefore, this paper investigates a feedback control system, where a piezoelectric patch is used to provide the control actuation and a remote damping method is used to examine the different compensators available to control either the local taper vibration or the reflected wave component. The investigation highlights that at most frequencies minimising the taper vibration does not significantly affect the reflected wave, however minimising the reflected wave enhances the taper vibration. It is also shown that in some cases both quantities can be reduced and that it is possible to maintain the passive ABH performance whilst simultaneously limiting the taper vibration, which reduces structural fatigue.
Feedback, Active control, Acoustic black hole, Remote damping
1-9
Hook, Kristian
6c9b8a1f-84fe-4560-9138-89cf5e8f4c4b
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Hook, Kristian
6c9b8a1f-84fe-4560-9138-89cf5e8f4c4b
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc

Hook, Kristian, Daley, Stephen and Cheer, Jordan (2020) Feedback active control using an acoustic black hole. International Conference on Noise and Vibration Engineering and International Conference on Uncertainty in Structural Dynamics, , Leuven, Belgium. 07 - 09 Sep 2020. pp. 1-9 .

Record type: Conference or Workshop Item (Paper)

Abstract

Acoustic black holes (ABHs) are tapered structural features that can achieve high levels of structural damping within lightweight constraints. It has previously been proposed to integrate feedforward active vibration control into an ABH to enable control over a broad spectrum, however, the time advance information required in this control strategy is not always available. Therefore, this paper investigates a feedback control system, where a piezoelectric patch is used to provide the control actuation and a remote damping method is used to examine the different compensators available to control either the local taper vibration or the reflected wave component. The investigation highlights that at most frequencies minimising the taper vibration does not significantly affect the reflected wave, however minimising the reflected wave enhances the taper vibration. It is also shown that in some cases both quantities can be reduced and that it is possible to maintain the passive ABH performance whilst simultaneously limiting the taper vibration, which reduces structural fatigue.

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More information

Published date: 8 September 2020
Venue - Dates: International Conference on Noise and Vibration Engineering and International Conference on Uncertainty in Structural Dynamics, , Leuven, Belgium, 2020-09-07 - 2020-09-09
Keywords: Feedback, Active control, Acoustic black hole, Remote damping

Identifiers

Local EPrints ID: 443947
URI: http://eprints.soton.ac.uk/id/eprint/443947
PURE UUID: e8875e73-e5c1-46f2-bf91-8b0a33bcdd11
ORCID for Kristian Hook: ORCID iD orcid.org/0000-0002-5011-0414
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 17 Sep 2020 16:35
Last modified: 01 Oct 2024 01:45

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Contributors

Author: Kristian Hook ORCID iD
Author: Stephen Daley
Author: Jordan Cheer ORCID iD

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