Analysis and design approaches for a frequency-agile piezoelectric energy harvester

Jess Flicker, David Munk, Wing Chiu, Ben Vien, Peter Finkel, Scott D. Moss

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

This paper discusses the analysis and design of a frequency-agile piezoelectric energy harvester. Energy harvesting from ambient vibrations is a key underpinning technology for self-powered, micro-electro-mechanical sensor networks. The harvester being examined is a high-frequency tunable bimorph arrangement that uses a co-located piezoelectric patch to contribute variable stiffness to the device. It is advantageous to be able to tune a harvester's resonant frequency, allowing it to harvest optimally as ambient conditions change. To achieve this, a harvesting approach based on an Mn-doped relaxor ferroelectric single crystal bimorph is investigated. A single degree-of-freedom analytical model for this approach is developed and applied to predict the harvester's sensitivity to various design parameters. Modelled predictions of harvester performance are shown to compare favourably with measurements.
Original languageEnglish
Title of host publicationACAM10: 10th Australasian Congress on Applied Mechanics
PublisherInformit
Number of pages13
ISBN (Print)9781925627596
Publication statusPublished - Jan 2021
EventAustralasian Congress on Applied Mechanics 2021 - Online, Australia
Duration: 1 Dec 20213 Dec 2021
Conference number: 10th
https://acamconference.com.au

Conference

ConferenceAustralasian Congress on Applied Mechanics 2021
Abbreviated titleACAM10
Country/TerritoryAustralia
Period1/12/213/12/21
Internet address

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