Sloshing liquid-metal mass for widening the bandwidth of a vibration energy harvester

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dc.contributor.author Jackson, Nathan
dc.contributor.author Stam, Frank
dc.date.accessioned 2019-01-08T11:29:43Z
dc.date.available 2019-01-08T11:29:43Z
dc.date.issued 2018-10-10
dc.identifier.citation Jackson, N. and Stam, F. (2018) 'Sloshing liquid-metal mass for widening the bandwidth of a vibration energy harvester', Sensors and Actuators A: Physical, 284, pp. 17-21. doi:10.1016/j.sna.2018.10.010 en
dc.identifier.volume 284 en
dc.identifier.startpage 17 en
dc.identifier.endpage 21 en
dc.identifier.issn 0924-4247
dc.identifier.uri http://hdl.handle.net/10468/7267
dc.identifier.doi 10.1016/j.sna.2018.10.010
dc.description.abstract Linear vibrational energy harvesting devices typically have narrow bandwidths, which limits their practical use, because the resonant frequency needs to match the frequency of the vibration source in order to maximize power generated. This paper presents a method of widening the bandwidth by using a highly dense liquid metal filled mass, which creates a sloshing effect that changes the center of gravity of the cantilever device during motion. The shift in center of gravity causes the resonant frequency of the cantilever to change. Since the resonant frequency of the device is constantly changing during oscillation of the cantilever, this results in a widening of the bandwidth. The displacement of the dense liquid metal has more influence on the center of gravity compared to other less dense liquids thus increasing the bandwidth. The paper demonstrates a 6.5× increase in bandwidth for the liquid metal filled mass compared to a typical air-filled mass with only a 9.6% reduction in power at 1g acceleration. Acceleration effects and mechanical damping were also investigated and presented within the paper. en
dc.description.sponsorship University College Cork (Tyndall National Institute Catalyst program) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier B.V. en
dc.rights © 2018, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license. en
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Bandwidth en
dc.subject Energy harvester en
dc.subject Piezoelectric en
dc.subject Cantilever en
dc.subject Liquid metal en
dc.title Sloshing liquid-metal mass for widening the bandwidth of a vibration energy harvester en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Frank Stam, Tyndall Microsystems, University College Cork, Cork, Ireland. +353-21-490-3000 Email: frank.stam@tyndall.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 24 months after publication by request of the publisher. en
dc.check.date 2020-10-10
dc.date.updated 2018-11-26T19:00:10Z
dc.description.version Accepted Version en
dc.internal.rssid 460084853
dc.contributor.funder University College Cork en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Sensors and Actuators A: Physical en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress frank.stam@tyndall.ie en


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© 2018, Elsevier B.V. All rights reserved.  This manuscript version is made available under the CC BY-NC-ND 4.0 license. Except where otherwise noted, this item's license is described as © 2018, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.
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