Roles of the Excitation in Harvesting Energy from Vibrations.

The study investigated the role of excitation in energy harvesting applications. While the energy ultimately comes from the excitation, it was shown that the excitation may not always behave as a source. When the device characteristics do not perfectly match the excitation, the excitation alternatel...

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Main Authors: Hui Zhang, Tianwei Ma
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2015-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC4619734?pdf=render
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spelling doaj-09fc56fd802e4a6d8a264479e61679492020-11-25T01:56:05ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-011010e014129910.1371/journal.pone.0141299Roles of the Excitation in Harvesting Energy from Vibrations.Hui ZhangTianwei MaThe study investigated the role of excitation in energy harvesting applications. While the energy ultimately comes from the excitation, it was shown that the excitation may not always behave as a source. When the device characteristics do not perfectly match the excitation, the excitation alternately behaves as a source and a sink. The extent to which the excitation behaves as a sink determines the energy harvesting efficiency. Such contradictory roles were shown to be dictated by a generalized phase defined as the instantaneous phase angle between the velocity of the device and the excitation. An inductive prototype device with a diamagnetically levitated seismic mass was proposed to take advantage of the well established phase changing mechanism of vibro-impact to achieve a broader device bandwidth. Results suggest that the vibro-impact can generate an instantaneous, significant phase shift in response velocity that switches the role of the excitation. If introduced properly outside the resonance zone it could dramatically increase the energy harvesting efficiency.http://europepmc.org/articles/PMC4619734?pdf=render
collection DOAJ
language English
format Article
sources DOAJ
author Hui Zhang
Tianwei Ma
spellingShingle Hui Zhang
Tianwei Ma
Roles of the Excitation in Harvesting Energy from Vibrations.
PLoS ONE
author_facet Hui Zhang
Tianwei Ma
author_sort Hui Zhang
title Roles of the Excitation in Harvesting Energy from Vibrations.
title_short Roles of the Excitation in Harvesting Energy from Vibrations.
title_full Roles of the Excitation in Harvesting Energy from Vibrations.
title_fullStr Roles of the Excitation in Harvesting Energy from Vibrations.
title_full_unstemmed Roles of the Excitation in Harvesting Energy from Vibrations.
title_sort roles of the excitation in harvesting energy from vibrations.
publisher Public Library of Science (PLoS)
series PLoS ONE
issn 1932-6203
publishDate 2015-01-01
description The study investigated the role of excitation in energy harvesting applications. While the energy ultimately comes from the excitation, it was shown that the excitation may not always behave as a source. When the device characteristics do not perfectly match the excitation, the excitation alternately behaves as a source and a sink. The extent to which the excitation behaves as a sink determines the energy harvesting efficiency. Such contradictory roles were shown to be dictated by a generalized phase defined as the instantaneous phase angle between the velocity of the device and the excitation. An inductive prototype device with a diamagnetically levitated seismic mass was proposed to take advantage of the well established phase changing mechanism of vibro-impact to achieve a broader device bandwidth. Results suggest that the vibro-impact can generate an instantaneous, significant phase shift in response velocity that switches the role of the excitation. If introduced properly outside the resonance zone it could dramatically increase the energy harvesting efficiency.
url http://europepmc.org/articles/PMC4619734?pdf=render
work_keys_str_mv AT huizhang rolesoftheexcitationinharvestingenergyfromvibrations
AT tianweima rolesoftheexcitationinharvestingenergyfromvibrations
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