On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation

Masoumi, Hamidreza; Moeenfard, Hamid; Khodaparast, Hamed Haddad; Friswell, Michael

doi:10.3390/aerospace7070093

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On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation

Hamidreza Masoumi, Hamid Moeenfard, Hamed Haddad Khodaparast

, Michael Friswell

Aerospace, Volume: 7, Issue: 7, Start page: 93

Swansea University Authors: Hamed Haddad Khodaparast , Michael Friswell

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DOI (Published version): 10.3390/aerospace7070093

Abstract

The current research investigates the novel approach of coupling separate energy harvesters in order to scavenge more power from a stochastic point of view. To this end, a multi-body system composed of two cantilever harvesters with two identical piezoelectric patches is considered. The beams are in...

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Published in:	Aerospace
ISSN:	2226-4310
Published:	MDPI AG 2020
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa54987
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first_indexed	2020-08-17T08:55:25Z
last_indexed	2020-09-18T03:17:31Z
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spelling	2020-09-17T13:59:11.0461573 v2 54987 2020-08-17 On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation f207b17edda9c4c3ea074cbb7555efc1 0000-0002-3721-4980 Hamed Haddad Khodaparast Hamed Haddad Khodaparast true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2020-08-17 AERO The current research investigates the novel approach of coupling separate energy harvesters in order to scavenge more power from a stochastic point of view. To this end, a multi-body system composed of two cantilever harvesters with two identical piezoelectric patches is considered. The beams are interconnected through a linear spring. Assuming a stochastic band limited white noise excitation of the base, the statistical properties of the mechanical response and those of the generated voltages are derived in closed form. Moreover, analytical models are derived for the expected value of the total harvested energy. In order to maximize the expected generated power, an optimization is performed to determine the optimum physical and geometrical characteristics of the system. It is observed that by properly tuning the harvester parameters, the energy harvesting performance of the structure is remarkably improved. Furthermore, using an optimized energy harvester model, this study shows that the coupling of the beams negatively affects the scavenged power, contrary to the effect previously demonstrated for harvesters under harmonic excitation. The qualitative and quantitative knowledge resulting from this analysis can be effectively employed for the realistic design and modelling of coupled multi-body structures under stochastic excitations. Journal Article Aerospace 7 7 93 MDPI AG 2226-4310 energy harvesting; piezoelectric; random vibration; spectral density; coupled structures; optimization 4 7 2020 2020-07-04 10.3390/aerospace7070093 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2020-09-17T13:59:11.0461573 2020-08-17T09:53:13.0927579 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Hamidreza Masoumi 1 Hamid Moeenfard 2 Hamed Haddad Khodaparast 0000-0002-3721-4980 3 Michael Friswell 4 54987__17940__ae17237c41e5420c9855e298e747dbd5.pdf 54987.pdf 2020-08-17T09:54:59.8462102 Output 5998036 application/pdf Version of Record true This is an open access article distributed under the Creative Commons Attribution License (CC-BY). true English https://creativecommons.org/licenses/by/4.0/
title	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation
spellingShingle	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation Hamed Haddad Khodaparast Michael Friswell
title_short	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation
title_full	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation
title_fullStr	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation
title_full_unstemmed	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation
title_sort	On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation
author_id_str_mv	f207b17edda9c4c3ea074cbb7555efc1 5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv	f207b17edda9c4c3ea074cbb7555efc1_*_Hamed Haddad Khodaparast 5894777b8f9c6e64bde3568d68078d40_*_Michael Friswell
author	Hamed Haddad Khodaparast Michael Friswell
author2	Hamidreza Masoumi Hamid Moeenfard Hamed Haddad Khodaparast Michael Friswell
format	Journal article
container_title	Aerospace
container_volume	7
container_issue	7
container_start_page	93
publishDate	2020
institution	Swansea University
issn	2226-4310
doi_str_mv	10.3390/aerospace7070093
publisher	MDPI AG
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
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hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
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description	The current research investigates the novel approach of coupling separate energy harvesters in order to scavenge more power from a stochastic point of view. To this end, a multi-body system composed of two cantilever harvesters with two identical piezoelectric patches is considered. The beams are interconnected through a linear spring. Assuming a stochastic band limited white noise excitation of the base, the statistical properties of the mechanical response and those of the generated voltages are derived in closed form. Moreover, analytical models are derived for the expected value of the total harvested energy. In order to maximize the expected generated power, an optimization is performed to determine the optimum physical and geometrical characteristics of the system. It is observed that by properly tuning the harvester parameters, the energy harvesting performance of the structure is remarkably improved. Furthermore, using an optimized energy harvester model, this study shows that the coupling of the beams negatively affects the scavenged power, contrary to the effect previously demonstrated for harvesters under harmonic excitation. The qualitative and quantitative knowledge resulting from this analysis can be effectively employed for the realistic design and modelling of coupled multi-body structures under stochastic excitations.
published_date	2020-07-04T04:08:53Z
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score	11.037319

On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation

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