This paper presents a piezoelectric harvester prototype with liquid tip mass for frequency tuning. The use of a liquid mass makes it possible to limit mechanical stress inside the harvester, with a resonance frequency reduction comparable to a solid mass. A mathematical model of the water sloshing in the tip container, which makes it possible to predict natural frequencies of a harvester with liquid mass, is presented. Such analytical model can be used for the harvester tuning to low-frequency vibration sources. Mathematical predictions are in good agreement with experimental results obtained from the harvester prototype. As an example of practical application is considered: energy harvesting from bicycle vibrations.

Tuning of Vibration Energy Harvesters by Means of Liquid Masses

Doria, Alberto
;
MARCONI, EDOARDO;Moro, Federico
2021

Abstract

This paper presents a piezoelectric harvester prototype with liquid tip mass for frequency tuning. The use of a liquid mass makes it possible to limit mechanical stress inside the harvester, with a resonance frequency reduction comparable to a solid mass. A mathematical model of the water sloshing in the tip container, which makes it possible to predict natural frequencies of a harvester with liquid mass, is presented. Such analytical model can be used for the harvester tuning to low-frequency vibration sources. Mathematical predictions are in good agreement with experimental results obtained from the harvester prototype. As an example of practical application is considered: energy harvesting from bicycle vibrations.
Proc. of 2021 Sixteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
978-1-6654-4902-1
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/3395379
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 0
social impact