Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator

In this study, we propose a bistable energy harvester with an auxiliary magnet oscillator (BEH-O), whose motion is mechanically rectified to enhance its broadband energy harvesting performance. The design of the proposed BEH-O system is based on local modification of the double-well potential. The a...

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Main Authors: Nguyen, Minh Sang, Yoon, Yong-Jin, Kwon, Ojin, Kim, Pilkee
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/102951
http://hdl.handle.net/10220/47275
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1029512023-03-04T17:17:28Z Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator Nguyen, Minh Sang Yoon, Yong-Jin Kwon, Ojin Kim, Pilkee School of Mechanical and Aerospace Engineering Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) DRNTU::Engineering::Mechanical engineering Magnetic Devices Energy Harvester In this study, we propose a bistable energy harvester with an auxiliary magnet oscillator (BEH-O), whose motion is mechanically rectified to enhance its broadband energy harvesting performance. The design of the proposed BEH-O system is based on local modification of the double-well potential. The auxiliary oscillator with the mechanical rectifier is designed in such a manner that its rectified half-sine motion tends to reduce the saddle barrier of restoring potential, leading to a possibility of an easier escape from the potential well, while keeping other parts of the potential, thereby maintaining high-energy orbital motion. Consequently, the lower bound of the operating frequency band of the BEH-O is reduced, when compared to its conventional counterpart, i.e., conventional bistable energy harvester (CBEH), while its upper bound remains unchanged. Such a broader frequency band of the BEH-O can be directly compared with that of the CBEH, as there is little difference in the high-energy orbital motion between the two. This beneficial effect of the BEH-O system is theoretically and experimentally supported by bifurcation analyses and frequency response analyses. MOE (Min. of Education, S’pore) Published version 2018-12-28T06:05:16Z 2019-12-06T21:02:39Z 2018-12-28T06:05:16Z 2019-12-06T21:02:39Z 2017 Journal Article Nguyen, M. S., Yoon, Y.-J., Kwon, O., & Kim, P. (2017). Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator. Applied Physics Letters, 111(25), 253905-. doi:10.1063/1.4994111 0003-6951 https://hdl.handle.net/10356/102951 http://hdl.handle.net/10220/47275 10.1063/1.4994111 en Applied Physics Letters © 2017 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The published version is available at: [http://dx.doi.org/10.1063/1.4994111]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering
Magnetic Devices
Energy Harvester
spellingShingle DRNTU::Engineering::Mechanical engineering
Magnetic Devices
Energy Harvester
Nguyen, Minh Sang
Yoon, Yong-Jin
Kwon, Ojin
Kim, Pilkee
Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
description In this study, we propose a bistable energy harvester with an auxiliary magnet oscillator (BEH-O), whose motion is mechanically rectified to enhance its broadband energy harvesting performance. The design of the proposed BEH-O system is based on local modification of the double-well potential. The auxiliary oscillator with the mechanical rectifier is designed in such a manner that its rectified half-sine motion tends to reduce the saddle barrier of restoring potential, leading to a possibility of an easier escape from the potential well, while keeping other parts of the potential, thereby maintaining high-energy orbital motion. Consequently, the lower bound of the operating frequency band of the BEH-O is reduced, when compared to its conventional counterpart, i.e., conventional bistable energy harvester (CBEH), while its upper bound remains unchanged. Such a broader frequency band of the BEH-O can be directly compared with that of the CBEH, as there is little difference in the high-energy orbital motion between the two. This beneficial effect of the BEH-O system is theoretically and experimentally supported by bifurcation analyses and frequency response analyses.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Nguyen, Minh Sang
Yoon, Yong-Jin
Kwon, Ojin
Kim, Pilkee
format Article
author Nguyen, Minh Sang
Yoon, Yong-Jin
Kwon, Ojin
Kim, Pilkee
author_sort Nguyen, Minh Sang
title Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
title_short Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
title_full Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
title_fullStr Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
title_full_unstemmed Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
title_sort lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
publishDate 2018
url https://hdl.handle.net/10356/102951
http://hdl.handle.net/10220/47275
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