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Identifying the nonlinear mechanical behaviour of micro-speakers from their quasi-linear electrical response

Identifying the nonlinear mechanical behaviour of micro-speakers from their quasi-linear electrical response
Identifying the nonlinear mechanical behaviour of micro-speakers from their quasi-linear electrical response
In this study model identification of the nonlinear dynamics of a micro-speaker is carried out by purely electrical measurements, avoiding any explicit vibration measurements. It is shown that a dynamic model of the micro-speaker, which takes into account the nonlinear damping characteristic of the device, can be identified by measuring the response between the voltage input and the current flowing into the coil. An analytical formulation of the quasi-linear model of the micro-speaker is first derived and an optimisation method is then used to identify a polynomial function which describes the mechanical damping behaviour of the micro-speaker. The analytical results of the quasi-linear model are compared with numerical results. This study potentially opens up the possibility of efficiently implementing nonlinear echo cancellers.
0888-3270
212-223
Zilletti, Michele
a36b24f0-e4ce-4bdd-abc7-c1f1e9c154a2
Marker, Arthur
0be3e6a2-817b-425f-8c2c-86cf6c7cc45a
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Holland, Keith
90dd842b-e3c8-45bb-865e-3e7da77ec703
Zilletti, Michele
a36b24f0-e4ce-4bdd-abc7-c1f1e9c154a2
Marker, Arthur
0be3e6a2-817b-425f-8c2c-86cf6c7cc45a
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Holland, Keith
90dd842b-e3c8-45bb-865e-3e7da77ec703

Zilletti, Michele, Marker, Arthur, Elliott, Stephen and Holland, Keith (2017) Identifying the nonlinear mechanical behaviour of micro-speakers from their quasi-linear electrical response. Mechanical Systems and Signal Processing, 88, 212-223. (doi:10.1016/j.ymssp.2016.10.018).

Record type: Article

Abstract

In this study model identification of the nonlinear dynamics of a micro-speaker is carried out by purely electrical measurements, avoiding any explicit vibration measurements. It is shown that a dynamic model of the micro-speaker, which takes into account the nonlinear damping characteristic of the device, can be identified by measuring the response between the voltage input and the current flowing into the coil. An analytical formulation of the quasi-linear model of the micro-speaker is first derived and an optimisation method is then used to identify a polynomial function which describes the mechanical damping behaviour of the micro-speaker. The analytical results of the quasi-linear model are compared with numerical results. This study potentially opens up the possibility of efficiently implementing nonlinear echo cancellers.

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Accepted/In Press date: 19 October 2016
e-pub ahead of print date: 28 November 2016
Published date: 1 May 2017
Organisations: Signal Processing & Control Grp

Identifiers

Local EPrints ID: 404115
URI: http://eprints.soton.ac.uk/id/eprint/404115
ISSN: 0888-3270
PURE UUID: a1aa6799-f4fe-4924-8f4c-eaf6cbb1e957
ORCID for Keith Holland: ORCID iD orcid.org/0000-0001-7439-2375

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Date deposited: 22 Dec 2016 10:22
Last modified: 15 Mar 2024 03:59

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Contributors

Author: Michele Zilletti
Author: Arthur Marker
Author: Stephen Elliott
Author: Keith Holland ORCID iD

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