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Performance and stability properties of a smart double panel with decentralized active dampers

Performance and stability properties of a smart double panel with decentralized active dampers
Performance and stability properties of a smart double panel with decentralized active dampers
This paper presents a theoretical study of active damping on a double panel vibroacoustic system. The system consists of two vibrating panels, which are structurally and acoustically coupled via elastic mounts and the air in the cavity between the panels. The “source” panel is excited by an acoustic plane wave, while the “radiating” panel radiates sound into free-field. An array of sixteen reactive actuators is located in the air cavity, in order to implement direct velocity feedback (DVFB) decentralized control loops. The aim is to generate active damping across the two panels so that the low frequency resonant sound transmission is reduced. It has been shown previously that collocated DVFB with idealized skyhook force actuators generates active damping on structures and is unconditionally stable. However, when reactive actuators are used, performance and stability of the system may be affected by a feed-through effect via the mounting system or the air in the cavity. A mathematical model for the problem has been developed, which considers the fully coupled configuration. Simulations with various feedback arrangements have been performed, and the results discussed, focusing particularly on the control system performance and stability.
13pp
Alujević, Neven
1d5b5792-2801-4ac4-bb04-b81cd9d38f17
Gardonio, Paolo
bae5bf72-ea81-43a6-a756-d7153d2de77a
Alujević, Neven
1d5b5792-2801-4ac4-bb04-b81cd9d38f17
Gardonio, Paolo
bae5bf72-ea81-43a6-a756-d7153d2de77a

Alujević, Neven and Gardonio, Paolo (2006) Performance and stability properties of a smart double panel with decentralized active dampers. Proceedings of the Sixth International Symposium on Active Noise and Vibration Control, ACTIVE 2006. 19 - 20 Sep 2006. 13pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents a theoretical study of active damping on a double panel vibroacoustic system. The system consists of two vibrating panels, which are structurally and acoustically coupled via elastic mounts and the air in the cavity between the panels. The “source” panel is excited by an acoustic plane wave, while the “radiating” panel radiates sound into free-field. An array of sixteen reactive actuators is located in the air cavity, in order to implement direct velocity feedback (DVFB) decentralized control loops. The aim is to generate active damping across the two panels so that the low frequency resonant sound transmission is reduced. It has been shown previously that collocated DVFB with idealized skyhook force actuators generates active damping on structures and is unconditionally stable. However, when reactive actuators are used, performance and stability of the system may be affected by a feed-through effect via the mounting system or the air in the cavity. A mathematical model for the problem has been developed, which considers the fully coupled configuration. Simulations with various feedback arrangements have been performed, and the results discussed, focusing particularly on the control system performance and stability.

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More information

Published date: 2006
Additional Information: CD-ROM
Venue - Dates: Proceedings of the Sixth International Symposium on Active Noise and Vibration Control, ACTIVE 2006, 2006-09-19 - 2006-09-20

Identifiers

Local EPrints ID: 42303
URI: https://eprints.soton.ac.uk/id/eprint/42303
PURE UUID: 221de514-9e72-4439-913c-c0b780e7e634

Catalogue record

Date deposited: 04 Dec 2006
Last modified: 13 Mar 2019 21:12

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