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Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting

This paper focuses on several aspects extending the dynamical efficiency of a cantilever beam vibrating in the third mode. A few ways of producing this mode stimulation, namely vibro-impact or forced excitation, as well as its application for energy harvesting devices are proposed. The paper present...

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Autores principales: Ostasevicius, Vytautas, Janusas, Giedrius, Milasauskaite, Ieva, Zilys, Mindaugas, Kizauskiene, Laura
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507603/
https://www.ncbi.nlm.nih.gov/pubmed/26029948
http://dx.doi.org/10.3390/s150612594
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author Ostasevicius, Vytautas
Janusas, Giedrius
Milasauskaite, Ieva
Zilys, Mindaugas
Kizauskiene, Laura
author_facet Ostasevicius, Vytautas
Janusas, Giedrius
Milasauskaite, Ieva
Zilys, Mindaugas
Kizauskiene, Laura
author_sort Ostasevicius, Vytautas
collection PubMed
description This paper focuses on several aspects extending the dynamical efficiency of a cantilever beam vibrating in the third mode. A few ways of producing this mode stimulation, namely vibro-impact or forced excitation, as well as its application for energy harvesting devices are proposed. The paper presents numerical and experimental analyses of novel structural dynamics effects along with an optimal configuration of the cantilever beam. The peculiarities of a cantilever beam vibrating in the third mode are related to the significant increase of the level of deformations capable of extracting significant additional amounts of energy compared to the conventional harvester vibrating in the first mode. Two types of a piezoelectric vibrating energy harvester (PVEH) prototype are analysed in this paper: the first one without electrode segmentation, while the second is segmented using electrode segmentation at the strain nodes of the third vibration mode to achieve effective operation at the third resonant frequency. The results of this research revealed that the voltage generated by any segment of the segmented PVEH prototype excited at the third resonant frequency demonstrated a 3.4–4.8-fold increase in comparison with the non-segmented prototype. Simultaneously, the efficiency of the energy harvester prototype also increased at lower resonant frequencies from 16% to 90%. The insights presented in the paper may serve for the development and fabrication of advanced piezoelectric energy harvesters which would be able to generate a considerably increased amount of electrical energy independently of the frequency of kinematical excitation.
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spelling pubmed-45076032015-07-22 Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting Ostasevicius, Vytautas Janusas, Giedrius Milasauskaite, Ieva Zilys, Mindaugas Kizauskiene, Laura Sensors (Basel) Article This paper focuses on several aspects extending the dynamical efficiency of a cantilever beam vibrating in the third mode. A few ways of producing this mode stimulation, namely vibro-impact or forced excitation, as well as its application for energy harvesting devices are proposed. The paper presents numerical and experimental analyses of novel structural dynamics effects along with an optimal configuration of the cantilever beam. The peculiarities of a cantilever beam vibrating in the third mode are related to the significant increase of the level of deformations capable of extracting significant additional amounts of energy compared to the conventional harvester vibrating in the first mode. Two types of a piezoelectric vibrating energy harvester (PVEH) prototype are analysed in this paper: the first one without electrode segmentation, while the second is segmented using electrode segmentation at the strain nodes of the third vibration mode to achieve effective operation at the third resonant frequency. The results of this research revealed that the voltage generated by any segment of the segmented PVEH prototype excited at the third resonant frequency demonstrated a 3.4–4.8-fold increase in comparison with the non-segmented prototype. Simultaneously, the efficiency of the energy harvester prototype also increased at lower resonant frequencies from 16% to 90%. The insights presented in the paper may serve for the development and fabrication of advanced piezoelectric energy harvesters which would be able to generate a considerably increased amount of electrical energy independently of the frequency of kinematical excitation. MDPI 2015-05-28 /pmc/articles/PMC4507603/ /pubmed/26029948 http://dx.doi.org/10.3390/s150612594 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ostasevicius, Vytautas
Janusas, Giedrius
Milasauskaite, Ieva
Zilys, Mindaugas
Kizauskiene, Laura
Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
title Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
title_full Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
title_fullStr Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
title_full_unstemmed Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
title_short Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting
title_sort peculiarities of the third natural frequency vibrations of a cantilever for the improvement of energy harvesting
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507603/
https://www.ncbi.nlm.nih.gov/pubmed/26029948
http://dx.doi.org/10.3390/s150612594
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