Detail publikace

Experimentally Verified Analytical Models of Piezoelectric Cantilevers in Different Design Configurations

MACHŮ, Z. RUBEŠ, O. ŠEVEČEK, O. HADAŠ, Z.

Originální název

Experimentally Verified Analytical Models of Piezoelectric Cantilevers in Different Design Configurations

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper deals with analytical modelling of piezoelectric energy harvesting systems for generating useful electricity from ambient vibrations and comparing the usefulness of materials commonly used in designing such harvesters for energy harvesting applications. The kinetic energy harvesters have the potential to be used as an autonomous source of energy for wireless applications. Here in this paper, the considered energy harvesting device is designed as a piezoelectric cantilever beam with different piezoelectric materials in both bimorph and unimorph configurations. For both these configurations a single degree-of-freedom model of a kinematically excited cantilever with a full and partial electrode length respecting the dimensions of added tip mass is derived. The analytical model is based on Euler-Bernoulli beam theory and its output is successfully verified with available experimental results of piezoelectric energy harvesters in three different configurations. The electrical output of the derived model for the three different materials (PZT-5A, PZZN-PLZT and PVDF) and design configurations is in accordance with lab measurements which are presented in the paper. Therefore, this model can be used for predicting the amount of harvested power in a particular vibratory environment. Finally, the derived analytical model was used to compare the energy harvesting effectiveness of the three considered materials for both simple harmonic excitation and random vibrations of the corresponding harvesters. The comparison revealed that both PZT-5A and PZZN-PLZT are an excellent choice for energy harvesting purposes thanks to high electrical power output, whereas PVDF should be used only for sensing applications due to low harvested electrical power output.

Klíčová slova

energy harvesting; vibrations; piezoelectric; analytical model; beam model; equivalent model; power prediction

Autoři

MACHŮ, Z.; RUBEŠ, O.; ŠEVEČEK, O.; HADAŠ, Z.

Vydáno

12. 10. 2021

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

1424-8220

Periodikum

SENSORS

Ročník

21

Číslo

20

Stát

Švýcarská konfederace

Strany od

6759

Strany do

6759

Strany počet

22

URL

https://www.mdpi.com/1424-8220/21/20/6759

Plný text v Digitální knihovně

http://hdl.handle.net/11012/201799

BibTex

@article{BUT172761,
  author="Zdeněk {Machů} and Ondřej {Rubeš} and Oldřich {Ševeček} and Zdeněk {Hadaš}",
  title="Experimentally Verified Analytical Models of Piezoelectric Cantilevers in Different Design Configurations",
  journal="SENSORS",
  year="2021",
  volume="21",
  number="20",
  pages="6759--6759",
  doi="10.3390/s21206759",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/21/20/6759"
}