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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2015
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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. |
format | Online Article Text |
id | pubmed-4507603 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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