Publication result detail

Optimization of the electro-mechanical response of the multilayer piezoelectric energy harvester

MACHŮ, Z.; ŠEVEČEK, O.; MAJER, Z.; HADAŠ, Z.; KOTOUL, M.

Original Title

Optimization of the electro-mechanical response of the multilayer piezoelectric energy harvester

English Title

Optimization of the electro-mechanical response of the multilayer piezoelectric energy harvester

Type

Paper in proceedings (conference paper)

Original Abstract

In this contribution, a design of novel cantilever beam energy harvester, composed of several ceramic layers with introduced high residual stresses, is proposed. The main aim of residual stresses is to protect the piezoelectric layer from cracking during the service of the harvester. A way to optimize composition of the multilayer energy harvester to receive both high apparent fracture toughness of the structure and simultaneously high electrical power of the harvester during its operation is presented. Both an analytical and a numerical model of the vibrational energy harvester are developed for this purpose. The increased resistance to fracture is achieved by means of high compressive stresses in the external ceramic layers. The electrical power output of the harvester is further optimized with respect to connected resistive load and excitation acceleration of vibrations. It was found that the optimal resistive load also leads to lowest mechanical stresses in particular laminate layers.

English abstract

In this contribution, a design of novel cantilever beam energy harvester, composed of several ceramic layers with introduced high residual stresses, is proposed. The main aim of residual stresses is to protect the piezoelectric layer from cracking during the service of the harvester. A way to optimize composition of the multilayer energy harvester to receive both high apparent fracture toughness of the structure and simultaneously high electrical power of the harvester during its operation is presented. Both an analytical and a numerical model of the vibrational energy harvester are developed for this purpose. The increased resistance to fracture is achieved by means of high compressive stresses in the external ceramic layers. The electrical power output of the harvester is further optimized with respect to connected resistive load and excitation acceleration of vibrations. It was found that the optimal resistive load also leads to lowest mechanical stresses in particular laminate layers.

Keywords

energy harvester, piezoelectric material, FEM, vibration

Key words in English

energy harvester, piezoelectric material, FEM, vibration

Authors

MACHŮ, Z.; ŠEVEČEK, O.; MAJER, Z.; HADAŠ, Z.; KOTOUL, M.

RIV year

2019

Released

05.12.2018

Publisher

Brno University of Technolgy, 2018

Location

Brno

ISBN

978-80-214-5543-6

Book

Proceedings of the 2018 18th International Conference on Mechatronics – Mechatronika (ME)

Edition

1

Pages from

143

Pages to

148

Pages count

6

URL

https://mechatronika.fel.cvut.cz/

BibTex

@inproceedings{BUT153222,
  author="Zdeněk {Machů} and Oldřich {Ševeček} and Zdeněk {Majer} and Zdeněk {Hadaš} and Michal {Kotoul}",
  title="Optimization of the electro-mechanical response of the multilayer piezoelectric energy harvester",
  booktitle="Proceedings of the 2018 18th International Conference on Mechatronics – Mechatronika (ME)",
  year="2018",
  series="1",
  number="1",
  pages="143--148",
  publisher="Brno University of Technolgy, 2018",
  address="Brno",
  isbn="978-80-214-5543-6",
  url="https://mechatronika.fel.cvut.cz/"
}