Analysis and optimal design of a vibration isolation system combined with electromagnetic energy harvester

Journal article


Diala, Uchenna, Mofidian, SM Mahdi, Lang, Zi-Qiang and Bardaweel, Hamzeh 2019. Analysis and optimal design of a vibration isolation system combined with electromagnetic energy harvester. Journal of Intelligent Material Systems and Structures. 30 (16), pp. 2382-2395. https://doi.org/10.1177/1045389x19862377
AuthorsDiala, Uchenna, Mofidian, SM Mahdi, Lang, Zi-Qiang and Bardaweel, Hamzeh
Abstract

This work investigates a vibration isolation energy harvesting system and studies its design to achieve an optimal performance. The system uses a combination of elastic and magnetic components to facilitate its dual functionality. A prototype of the vibration isolation energy harvesting device is fabricated and examined experimentally. A mathematical model is developed using first principle and analyzed using the output frequency response function method. Results from model analysis show an excellent agreement with experiment. Since any vibration isolation energy harvesting system is required to perform two functions simultaneously, optimization of the system is carried out to maximize energy conversion efficiency without jeopardizing the system’s vibration isolation performance. To the knowledge of the authors, this work is the first effort to tackle the issue of simultaneous vibration isolation energy harvesting using an analytical approach. Explicit analytical relationships describing the vibration isolation energy harvesting system transmissibility and energy conversion efficiency are developed. Results exhibit a maximum attainable energy conversion efficiency in the order of 1%. Results suggest that for low acceleration levels, lower damping values are favorable and yield higher conversion efficiencies and improved vibration isolation characteristics. At higher acceleration, there is a trade-off where lower damping values worsen vibration isolation but yield higher conversion efficiencies.

KeywordsMechanical Engineering; General Materials Science
Year2019
JournalJournal of Intelligent Material Systems and Structures
Journal citation30 (16), pp. 2382-2395
PublisherSAGE Publications
ISSN1045-389X
1530-8138
Digital Object Identifier (DOI)https://doi.org/10.1177/1045389x19862377
Web address (URL)http://hdl.handle.net/10545/624294
hdl:10545/624294
Publication dates17 Jul 2019
Publication process dates
Deposited27 Nov 2019, 15:10
Accepted2019
ContributorsUniversity of Sheffield
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File Access Level
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