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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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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
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URI: https://cronfa.swan.ac.uk/Record/cronfa54987
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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 EEN 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 Engineering COLLEGE CODE EEN Swansea University 2020-09-17T13:59:11.0461573 2020-08-17T09:53:13.0927579 College of Engineering Engineering 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
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 College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
document_store_str 1
active_str 0
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 2020-07-04T04:21:24Z
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