On the mechanical behaviour in stiffness compensated piezoelectric beams - An experimental investigation towards energy harvesting

E. van de Wetering, T. W.A. Blad*, R. A.J. van Ostayen

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

In this work, a piezoelectric beam is stiffness compensated through adding a negative stiffness formed by attracting magnets. The mechanism's purpose is low-frequency energy harvesting. The effect of deformation speed on the beam's stiffness is investigated by force-displacement measurements taken at different speeds and with different load resistors connected. The effect of the load resistance on the beam's stiffness has been found to be strongly dependent on the deformation speed. A load that results in the same stiffness as in a closed circuit at low deformation speed results in a stiffer response at a faster deformation speed. Also, when the beam is brought close to static balance with a certain load resistance connected, alteration of the load resistance has a great influence on the attained stiffness level. Furthermore, memory effects in the hysteresis found in piezoelectric actuators, related between input voltage and displacement, were also confirmed between displacement and force in sensor application.

Original languageEnglish
Title of host publication33rd Conference on Mechanical Vibration and Sound (VIB)
Subtitle of host publicationASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
PublisherThe American Society of Mechanical Engineers(ASME)
Number of pages9
ISBN (Electronic)978-0-7918-8547-5
DOIs
Publication statusPublished - 2021
Event33rd Conference on Mechanical Vibration and Sound, VIB 2021, Held as Part of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2021 - Virtual, Online
Duration: 17 Aug 202119 Aug 2021

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume10

Conference

Conference33rd Conference on Mechanical Vibration and Sound, VIB 2021, Held as Part of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2021
CityVirtual, Online
Period17/08/2119/08/21

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