The University of Southampton
University of Southampton Institutional Repository

Smart double panel with decentralised active dampers for control of sound transmission

Smart double panel with decentralised active dampers for control of sound transmission
Smart double panel with decentralised active dampers for control of sound transmission
This report presents the results of a theoretical study of active sound transmission control through a double panel. The double panel material and geometrical properties have been chosen so as to emulate section of an aircraft fuselage, or bodywork of a vehicle. It consists of two plates: an aluminium plate simply supported along all the edges and a honeycomb plate with all the edges free. The two plates, having the same length and width, are connected using elastic mounts, so that a double panel with a thin rectangular cavity between the plates is formed. Since the two plates are linked by the mounting system, and since the air is confined in the cavity between them, they form a structurally and acoustically coupled system. The sound transmission properties of the system are studied in such a way that the aluminium plate (“source panel”) is excited using a plane acoustic wave, while the honeycomb plate (“radiating panel”) radiates sound into free field.
The aim of the active control is to reduce the sound transmitted in a broad frequency band, but with a particular focus on the reduction of the sound transmission at lower frequencies of the band. Decentralised velocity feedback control systems (applying active damping) are implemented, with purpose of reducing sound transmission at resonance frequencies. Control sensors and actuators are embedded into the double plate system as a regular array, so that a smart double panel is created. The theoretical study includes analysis of the passive sound transmission in terms of a parametric study, implementation of the active control using skyhook velocity sensors and skyhook force actuators, and the performance/stability analysis in case when reactive actuators and skyhook velocity sensors are used. In the latter case the actuating force is obtained using actuators located in the air cavity which can react off the two plates
972
Institute of Sound and Vibration Research, University of Southampton
Alujević, Neven
1d5b5792-2801-4ac4-bb04-b81cd9d38f17
Frampton, Kenneth D.
94506b25-ed47-4216-8795-9f33a3761cfc
Gardonio, Paolo
bae5bf72-ea81-43a6-a756-d7153d2de77a
Alujević, Neven
1d5b5792-2801-4ac4-bb04-b81cd9d38f17
Frampton, Kenneth D.
94506b25-ed47-4216-8795-9f33a3761cfc
Gardonio, Paolo
bae5bf72-ea81-43a6-a756-d7153d2de77a

Alujević, Neven, Frampton, Kenneth D. and Gardonio, Paolo (2007) Smart double panel with decentralised active dampers for control of sound transmission (ISVR Technical Memorandum, 972) Southampton, UK. Institute of Sound and Vibration Research, University of Southampton 84pp.

Record type: Monograph (Project Report)

Abstract

This report presents the results of a theoretical study of active sound transmission control through a double panel. The double panel material and geometrical properties have been chosen so as to emulate section of an aircraft fuselage, or bodywork of a vehicle. It consists of two plates: an aluminium plate simply supported along all the edges and a honeycomb plate with all the edges free. The two plates, having the same length and width, are connected using elastic mounts, so that a double panel with a thin rectangular cavity between the plates is formed. Since the two plates are linked by the mounting system, and since the air is confined in the cavity between them, they form a structurally and acoustically coupled system. The sound transmission properties of the system are studied in such a way that the aluminium plate (“source panel”) is excited using a plane acoustic wave, while the honeycomb plate (“radiating panel”) radiates sound into free field.
The aim of the active control is to reduce the sound transmitted in a broad frequency band, but with a particular focus on the reduction of the sound transmission at lower frequencies of the band. Decentralised velocity feedback control systems (applying active damping) are implemented, with purpose of reducing sound transmission at resonance frequencies. Control sensors and actuators are embedded into the double plate system as a regular array, so that a smart double panel is created. The theoretical study includes analysis of the passive sound transmission in terms of a parametric study, implementation of the active control using skyhook velocity sensors and skyhook force actuators, and the performance/stability analysis in case when reactive actuators and skyhook velocity sensors are used. In the latter case the actuating force is obtained using actuators located in the air cavity which can react off the two plates

Text
Pub9191.pdf - Accepted Manuscript
Download (5MB)

More information

Published date: 2007

Identifiers

Local EPrints ID: 45702
URI: https://eprints.soton.ac.uk/id/eprint/45702
PURE UUID: d4c7ac0d-835d-4109-8f30-34669ffa3692

Catalogue record

Date deposited: 17 Apr 2007
Last modified: 13 Mar 2019 21:05

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×