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A tunable kinetic energy harvester with dynamic over range protection

A tunable kinetic energy harvester with dynamic over range protection
A tunable kinetic energy harvester with dynamic over range protection
This paper describes the development and implementation of a self-powered control system that autonomously adapts the resonant frequency of an electromagnetic vibration-based energy harvester to ambient vibration frequency. The tuning mechanism adjusts the harvester’s spring stiffness by varying the axial tensile force between two permanent magnets. The system adjusts the resonant frequency of the harvester from 64 to 78 Hz, increasing the operational bandwidth of the harvester from 0.26 to 14 Hz, using a single structure. The same tuning principle is also applied to protect the harvester from over range acceleration which could cause physical damage to its structure. The closed loop control uses the phase difference between the harvester output signal and ambient vibration, measured by an accelerometer attached to the vibration source, to adjust the tuning mechanism.
1-10
Ayala Garcia, Ivo
72097522-d05b-49c6-b997-faeec3b1bb2e
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Tudor, John
46eea408-2246-4aa0-8b44-86169ed601ff
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Ayala Garcia, Ivo
72097522-d05b-49c6-b997-faeec3b1bb2e
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Tudor, John
46eea408-2246-4aa0-8b44-86169ed601ff
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Ayala Garcia, Ivo, Zhu, Dibin, Tudor, John and Beeby, Steve (2010) A tunable kinetic energy harvester with dynamic over range protection. Smart Materials and Structures, 19 (11), 1-10. (doi:10.1088/0964-1726/19/11/115005).

Record type: Article

Abstract

This paper describes the development and implementation of a self-powered control system that autonomously adapts the resonant frequency of an electromagnetic vibration-based energy harvester to ambient vibration frequency. The tuning mechanism adjusts the harvester’s spring stiffness by varying the axial tensile force between two permanent magnets. The system adjusts the resonant frequency of the harvester from 64 to 78 Hz, increasing the operational bandwidth of the harvester from 0.26 to 14 Hz, using a single structure. The same tuning principle is also applied to protect the harvester from over range acceleration which could cause physical damage to its structure. The closed loop control uses the phase difference between the harvester output signal and ambient vibration, measured by an accelerometer attached to the vibration source, to adjust the tuning mechanism.

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More information

Published date: 2010
Organisations: EEE

Identifiers

Local EPrints ID: 271578
URI: https://eprints.soton.ac.uk/id/eprint/271578
PURE UUID: e524ec76-9e6b-42e5-87e8-0d8205bd07c7
ORCID for Steve Beeby: ORCID iD orcid.org/0000-0002-0800-1759

Catalogue record

Date deposited: 22 Sep 2010 08:21
Last modified: 06 Jun 2018 13:07

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