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Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester
Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester
This study investigates several important considerations to be made when optimising the structural aspects of a single-degree-of-freedom (SDOF) electromagnetic vibration energy harvester. Using the critically damped stress method, the damping and power output of the harvester were modelled and verified, displaying an excellent agreement with the experimental results. The SDOF harvester was structurally optimised under a certain set of constraints and it was found that under the fixed beam's thickness condition, the harvester displayed an insignificant increase in power output as a function of volume when the device's size was relatively larger. This highlights the importance of considering a smaller practical volume for this case. Additionally, when optimising the device using a low stress constraint and a low damping material, it was observed that considering the load resistance as an input parameter to the objective function would lead to a higher power output compared to the optimum load resistance condition. Further analysis indicated that there exists a power limit when the electromagnetic coupling coefficient approaches infinity. For the case of a high electromagnetic coupling coefficient value and a small volume constraint, it is possible to achieve approximately 80.0% of the harvester's power limit. Finally, it was demonstrated that a high power output can be achieved for a SDOF electromagnetic harvester by considering a high-density proof mass centred at the free end of the beam.
Electromagnetic energy harvesting, Damping, Structural optimisation, SDOF, Power
0022-460X
Foong, Faruq Muhammad
c2447e9f-b32a-4d99-a872-c6648903c557
Thein, Chung Ket
be1dc467-d763-46fe-99f6-53e1c03c254d
Yurchenko, Daniil
51a2896b-281e-4977-bb72-5f96e891fbf8
Foong, Faruq Muhammad
c2447e9f-b32a-4d99-a872-c6648903c557
Thein, Chung Ket
be1dc467-d763-46fe-99f6-53e1c03c254d
Yurchenko, Daniil
51a2896b-281e-4977-bb72-5f96e891fbf8

Foong, Faruq Muhammad, Thein, Chung Ket and Yurchenko, Daniil (2020) Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester. Journal of Sound and Vibration, 482, [115470]. (doi:10.1016/j.jsv.2020.115470).

Record type: Article

Abstract

This study investigates several important considerations to be made when optimising the structural aspects of a single-degree-of-freedom (SDOF) electromagnetic vibration energy harvester. Using the critically damped stress method, the damping and power output of the harvester were modelled and verified, displaying an excellent agreement with the experimental results. The SDOF harvester was structurally optimised under a certain set of constraints and it was found that under the fixed beam's thickness condition, the harvester displayed an insignificant increase in power output as a function of volume when the device's size was relatively larger. This highlights the importance of considering a smaller practical volume for this case. Additionally, when optimising the device using a low stress constraint and a low damping material, it was observed that considering the load resistance as an input parameter to the objective function would lead to a higher power output compared to the optimum load resistance condition. Further analysis indicated that there exists a power limit when the electromagnetic coupling coefficient approaches infinity. For the case of a high electromagnetic coupling coefficient value and a small volume constraint, it is possible to achieve approximately 80.0% of the harvester's power limit. Finally, it was demonstrated that a high power output can be achieved for a SDOF electromagnetic harvester by considering a high-density proof mass centred at the free end of the beam.

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More information

e-pub ahead of print date: 26 May 2020
Published date: 15 September 2020
Keywords: Electromagnetic energy harvesting, Damping, Structural optimisation, SDOF, Power

Identifiers

Local EPrints ID: 469717
URI: http://eprints.soton.ac.uk/id/eprint/469717
ISSN: 0022-460X
PURE UUID: a74bcfbc-f520-4ca0-8eaa-aeebcef482ad
ORCID for Daniil Yurchenko: ORCID iD orcid.org/0000-0002-4989-3634

Catalogue record

Date deposited: 22 Sep 2022 17:05
Last modified: 23 Feb 2023 03:26

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Contributors

Author: Faruq Muhammad Foong
Author: Chung Ket Thein
Author: Daniil Yurchenko ORCID iD

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