The University of Southampton
University of Southampton Institutional Repository

Active structural acoustic control smart panel with small scale proof mass actuators

González Díaz, Cristóbal (2007) Active structural acoustic control smart panel with small scale proof mass actuators University of Southampton, Institute of Sound and Vibration Research, Doctoral Thesis , 184pp.

Record type: Thesis (Doctoral)

Abstract

This thesis presents a comprehensive study of decentralised feedback control on a smart panel with electrodynamic proof mass actuators and velocity sensors at their footprints. The aim is to provide guidance for the design of light, simple, robust and low cost, control units which can be attached in large numbers to flexible structures in order to control their spatially averaged response and sound radiation at low audio-frequencies. The first part of the thesis is focused on the identification of simple and effective single channel feedback control laws. In particular the stability properties and control performance produced by Proportional, Integral, Derivative, PI, PD, PID feedback control laws are assessed with reference to two simple problems where a single degrees of freedom system is controlled by an ideal reactive force actuator and by a practical proof mass actuator. Following this introductory study, the implementation of decentralised feedback control on a smart panel with five control units using proof mass electrodynamic actuators is investigated for the best two cases of Proportional and PID control. In parallel the practical design of small scale control units is explored. In particular the scaling of the stability and control performance properties of a single control unit that implements proportional control is examined using a stability–control formula. The final part of the thesis presents the stability and control performance tests carried out on a single control unit and on five decentralised control units. For the multiple channel control case, the reductions of the spatially averaged vibration measured with a laser vibrometer and the reduction of the total sound power radiation measured in an anechoic room are presented.

PDF P2425.pdf - Other
Download (10MB)

More information

Published date: December 2007
Organisations: University of Southampton

Identifiers

Local EPrints ID: 64536
URI: http://eprints.soton.ac.uk/id/eprint/64536
PURE UUID: 426e673e-7f6c-466a-85ff-935481b3297c

Catalogue record

Date deposited: 07 Jan 2009
Last modified: 17 Jul 2017 14:13

Export record

Contributors

Author: Cristóbal González Díaz
Thesis advisor: Paolo Gardonio

University divisions

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 http://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.

×