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Optimal feedforward control of a beam with an active acoustic black hole termination

Optimal feedforward control of a beam with an active acoustic black hole termination
Optimal feedforward control of a beam with an active acoustic black hole termination
Acoustic black holes are structural features that are realised by tapering the thickness of a beam or plate, usually via a power law profile. Practical acoustic black holes have been shown to significantly reduce vibrations at high frequencies when combined with a thin layer of passive damping but, due to design constraints on the taper length and tip height, passive designs are somewhat limited at lower frequencies. In this paper, an active solution has been investigated to control the low frequency vibration of a beam with an acoustic black hole termination. Piezoelectric patch actuators have been attached to the taper and unconstrained feedforward control has been simulated to minimise the kinetic energy of the uniform beam section. The effect that this control strategy has on the structural response has been investigated through a series of numerical simulations and the potential performance of an active acoustic black hole has thus been demonstrated.
acoustic black holes, active vibration control, vibration attenuation, broadband, finite element modelling
Hook, Kristian
bc559872-adc7-428e-8570-8eb4b19d5865
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Hook, Kristian
bc559872-adc7-428e-8570-8eb4b19d5865
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6

Hook, Kristian, Cheer, Jordan and Daley, Stephen (2019) Optimal feedforward control of a beam with an active acoustic black hole termination. 26th International Congress on Sound and Vibration, Montreal, Canada. 07 - 11 Jul 2019. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Acoustic black holes are structural features that are realised by tapering the thickness of a beam or plate, usually via a power law profile. Practical acoustic black holes have been shown to significantly reduce vibrations at high frequencies when combined with a thin layer of passive damping but, due to design constraints on the taper length and tip height, passive designs are somewhat limited at lower frequencies. In this paper, an active solution has been investigated to control the low frequency vibration of a beam with an acoustic black hole termination. Piezoelectric patch actuators have been attached to the taper and unconstrained feedforward control has been simulated to minimise the kinetic energy of the uniform beam section. The effect that this control strategy has on the structural response has been investigated through a series of numerical simulations and the potential performance of an active acoustic black hole has thus been demonstrated.

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OPTIMAL FEEDFORWARD CONTROL OF A BEAM WITH AN ACTIVE ACOUSTIC BLACK HOLE TERMINATION - Author's Original
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More information

Published date: 8 July 2019
Venue - Dates: 26th International Congress on Sound and Vibration, Montreal, Canada, 2019-07-07 - 2019-07-11
Keywords: acoustic black holes, active vibration control, vibration attenuation, broadband, finite element modelling

Identifiers

Local EPrints ID: 432787
URI: http://eprints.soton.ac.uk/id/eprint/432787
PURE UUID: 10817743-6cd0-42b9-95af-942c1e7b911e
ORCID for Kristian Hook: ORCID iD orcid.org/0000-0002-5011-0414
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

Catalogue record

Date deposited: 26 Jul 2019 16:30
Last modified: 27 Jul 2019 00:32

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