On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device

Aliasghary, Mortaza; Azizishirvanshahi, Saber Azizi; Madinei, Hadi; Khodaparast, Hamed Haddad

doi:10.3390/vibration5030035

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On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device

Mortaza Aliasghary

, Saber Azizi Azizishirvanshahi, Hadi Madinei

, Hamed Haddad Khodaparast

Vibration, Volume: 5, Issue: 3, Pages: 603 - 612

Swansea University Authors: Saber Azizi Azizishirvanshahi, Hadi Madinei , Hamed Haddad Khodaparast

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DOI (Published version): 10.3390/vibration5030035

Abstract

In this paper, we propose an active control method to adjust the resonance frequency of a capacitive energy harvester. To this end, the resonance frequency of the harvester is tuned using an electrostatic force, which is actively controlled by a voltage source. The spring softening effect of the ele...

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Published in:	Vibration
ISSN:	2571-631X
Published:	MDPI AG 2022
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URI:	https://cronfa.swan.ac.uk/Record/cronfa61472
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spelling	2022-10-21T10:58:23.4126906 v2 61472 2022-10-07 On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device d69732e7f5a3b101651f3654bf7175d0 Saber Azizi Azizishirvanshahi Saber Azizi Azizishirvanshahi true false d9a10856ae9e6a71793eab2365cff8b6 0000-0002-3401-1467 Hadi Madinei Hadi Madinei true false f207b17edda9c4c3ea074cbb7555efc1 0000-0002-3721-4980 Hamed Haddad Khodaparast Hamed Haddad Khodaparast true false 2022-10-07 MECH In this paper, we propose an active control method to adjust the resonance frequency of a capacitive energy harvester. To this end, the resonance frequency of the harvester is tuned using an electrostatic force, which is actively controlled by a voltage source. The spring softening effect of the electrostatic force is used to accommodate the dominant frequency of the ambient mechanical vibration within the bandwidth of the resonance region. A single degree of freedom is considered, and the nonlinear equation of motion is numerically integrated over time. Using a conventional proportional–integral–derivative (PID) control mechanism, the results demonstrated that our controller could shift the resonance frequency leftward on the frequency domain and, as a result, improve the efficiency of the energy harvester, provided that the excitation frequency is lower than the resonance frequency of the energy harvester. Application of the PID controller in the resonance zone resulted in pull-in instability, adversely affecting the harvester’s performance. To tackle this problem, we embedded a saturation mechanism in the path of the control signal to prevent a sudden change in motion amplitude. Outside the pull-in band, the saturation of the control signal resulted in the reduction of harvested power compared to the non-saturated signal; this is a promising improvement in the design and analysis of energy harvesting devices. Journal Article Vibration 5 3 603 612 MDPI AG 2571-631X capacitive energy harvesting; MEMS; PID controller; tunability; base excitation 6 9 2022 2022-09-06 10.3390/vibration5030035 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University The paper has received no fundings. 2022-10-21T10:58:23.4126906 2022-10-07T09:39:15.9816895 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Mortaza Aliasghary 0000-0002-2638-8643 1 Saber Azizi Azizishirvanshahi 2 Hadi Madinei 0000-0002-3401-1467 3 Hamed Haddad Khodaparast 0000-0002-3721-4980 4 61472__25543__b389d010df524e64aea8a37dfe6d33d3.pdf 61472_VoR.pdf 2022-10-21T10:56:56.9636353 Output 7690612 application/pdf Version of Record true © 2022 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license true eng https://creativecommons.org/licenses/by/4.0/
title	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
spellingShingle	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device Saber Azizi Azizishirvanshahi Hadi Madinei Hamed Haddad Khodaparast
title_short	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
title_full	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
title_fullStr	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
title_full_unstemmed	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
title_sort	On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
author_id_str_mv	d69732e7f5a3b101651f3654bf7175d0 d9a10856ae9e6a71793eab2365cff8b6 f207b17edda9c4c3ea074cbb7555efc1
author_id_fullname_str_mv	d69732e7f5a3b101651f3654bf7175d0_*_Saber Azizi Azizishirvanshahi d9a10856ae9e6a71793eab2365cff8b6__Hadi Madinei f207b17edda9c4c3ea074cbb7555efc1_**_Hamed Haddad Khodaparast
author	Saber Azizi Azizishirvanshahi Hadi Madinei Hamed Haddad Khodaparast
author2	Mortaza Aliasghary Saber Azizi Azizishirvanshahi Hadi Madinei Hamed Haddad Khodaparast
format	Journal article
container_title	Vibration
container_volume	5
container_issue	3
container_start_page	603
publishDate	2022
institution	Swansea University
issn	2571-631X
doi_str_mv	10.3390/vibration5030035
publisher	MDPI AG
college_str	Faculty of Science and Engineering
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department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
document_store_str	1
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description	In this paper, we propose an active control method to adjust the resonance frequency of a capacitive energy harvester. To this end, the resonance frequency of the harvester is tuned using an electrostatic force, which is actively controlled by a voltage source. The spring softening effect of the electrostatic force is used to accommodate the dominant frequency of the ambient mechanical vibration within the bandwidth of the resonance region. A single degree of freedom is considered, and the nonlinear equation of motion is numerically integrated over time. Using a conventional proportional–integral–derivative (PID) control mechanism, the results demonstrated that our controller could shift the resonance frequency leftward on the frequency domain and, as a result, improve the efficiency of the energy harvester, provided that the excitation frequency is lower than the resonance frequency of the energy harvester. Application of the PID controller in the resonance zone resulted in pull-in instability, adversely affecting the harvester’s performance. To tackle this problem, we embedded a saturation mechanism in the path of the control signal to prevent a sudden change in motion amplitude. Outside the pull-in band, the saturation of the control signal resulted in the reduction of harvested power compared to the non-saturated signal; this is a promising improvement in the design and analysis of energy harvesting devices.
published_date	2022-09-06T04:20:18Z
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score	11.036837

On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device

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