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Frequency Tuning of Vibration Energy Harvesters using Compressive and Tensile Axial Loads

Frequency Tuning of Vibration Energy Harvesters using Compressive and Tensile Axial Loads
Frequency Tuning of Vibration Energy Harvesters using Compressive and Tensile Axial Loads
In this paper the performance in terms of resonant frequency and output power of cantilever-based vibration energy harvesters under different mechanical axial loads will be compared providing a comprehensive assessment of this method as a way of increasing the operational frequency range through tuning. Two types of axial loads were used in the test, i.e. tensile and compressive force. To eliminate the effect of any other mechanical loads on performance of the energy harvester and minimize external damping, a contactless force, i.e. magnetic force, was applied to the cantilever. It is found that although resonant frequency tuning by applying compressive force is more sensitive than tuning by tensile force, the reduction in Q-factor under compressive loads makes it less useful than tuning by applying tensile loads. Axial compressive loads can, however, be used to achieve a bi-stable structure which can also be a solution to wideband energy harvesters.
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Tudor, John
46eea408-2246-4aa0-8b44-86169ed601ff
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Tudor, John
46eea408-2246-4aa0-8b44-86169ed601ff
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Zhu, Dibin, Tudor, John and Beeby, Steve (2011) Frequency Tuning of Vibration Energy Harvesters using Compressive and Tensile Axial Loads. At PowerMEMS 2011 PowerMEMS 2011. 15 - 18 Nov 2011.

Record type: Conference or Workshop Item (Poster)

Abstract

In this paper the performance in terms of resonant frequency and output power of cantilever-based vibration energy harvesters under different mechanical axial loads will be compared providing a comprehensive assessment of this method as a way of increasing the operational frequency range through tuning. Two types of axial loads were used in the test, i.e. tensile and compressive force. To eliminate the effect of any other mechanical loads on performance of the energy harvester and minimize external damping, a contactless force, i.e. magnetic force, was applied to the cantilever. It is found that although resonant frequency tuning by applying compressive force is more sensitive than tuning by tensile force, the reduction in Q-factor under compressive loads makes it less useful than tuning by applying tensile loads. Axial compressive loads can, however, be used to achieve a bi-stable structure which can also be a solution to wideband energy harvesters.

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More information

Published date: November 2011
Additional Information: Event Dates: November 15 - 18
Venue - Dates: PowerMEMS 2011, 2011-11-15 - 2011-11-18
Organisations: EEE

Identifiers

Local EPrints ID: 273015
URI: https://eprints.soton.ac.uk/id/eprint/273015
PURE UUID: 9d50511d-0193-4816-adbc-d6968bbdb633
ORCID for Steve Beeby: ORCID iD orcid.org/0000-0002-0800-1759

Catalogue record

Date deposited: 18 Nov 2011 00:24
Last modified: 06 Jun 2018 13:07

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