Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Chen, S; Eager, D; Zhao, L

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Chen, S Eager, D

Zhao, L

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Publisher:: SAGE PUBLICATIONS LTD
Publication Type:: Journal Article
Citation:: Journal of Intelligent Material Systems and Structures, 2022, 33, (5), pp. 687-702
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Chen, S
dc.contributor.author	Eager, D https://orcid.org/0000-0003-1926-7867
dc.contributor.author	Zhao, L https://orcid.org/0000-0002-6229-4871
dc.date.accessioned	2023-03-10T03:53:36Z
dc.date.available	2023-03-10T03:53:36Z
dc.date.issued	2022-01-01
dc.identifier.citation	Journal of Intelligent Material Systems and Structures, 2022, 33, (5), pp. 687-702
dc.identifier.issn	1045-389X
dc.identifier.issn	1530-8138
dc.identifier.uri	http://hdl.handle.net/10453/166955
dc.description.abstract	This paper proposes a softening nonlinear aeroelastic galloping energy harvester for enhanced energy harvesting from concurrent wind flow and base vibration. Traditional linear aeroelastic energy harvesters have poor performance with quasi-periodic oscillations when the base vibration frequency deviates from the aeroelastic frequency. The softening nonlinearity in the proposed harvester alters the self-excited galloping frequency and simultaneously extends the large-amplitude base-excited oscillation to a wider frequency range, achieving frequency synchronization over a remarkably broadened bandwidth with periodic oscillations for efficient energy conversion from dual sources. A fully coupled aero-electro-mechanical model is built and validated with measurements on a devised prototype. At a wind speed of 5.5 m/s and base acceleration of 0.1 g, the proposed harvester improves the performance by widening the effective bandwidth by 300% compared to the linear counterpart without sacrificing the voltage level. The influences of nonlinearity configuration, excitation magnitude, and electromechanical coupling strength on the mechanical and electrical behavior are examined. The results of this paper form a baseline for future efficiency enhancement of energy harvesting from concurrent wind and base vibration utilizing monostable stiffness nonlinearities.
dc.language	English
dc.publisher	SAGE PUBLICATIONS LTD
dc.relation.ispartof	Journal of Intelligent Material Systems and Structures
dc.relation.isbasedon	10.1177/1045389X211026381
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	09 Engineering
dc.subject.classification	Materials
dc.title	Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester
dc.type	Journal Article
utslib.citation.volume	33
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/e-Press
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney/Centre for Health Technologies (CHT)
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2023-03-10T03:53:22Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	33
utslib.citation.issue	5

Abstract:

This paper proposes a softening nonlinear aeroelastic galloping energy harvester for enhanced energy harvesting from concurrent wind flow and base vibration. Traditional linear aeroelastic energy harvesters have poor performance with quasi-periodic oscillations when the base vibration frequency deviates from the aeroelastic frequency. The softening nonlinearity in the proposed harvester alters the self-excited galloping frequency and simultaneously extends the large-amplitude base-excited oscillation to a wider frequency range, achieving frequency synchronization over a remarkably broadened bandwidth with periodic oscillations for efficient energy conversion from dual sources. A fully coupled aero-electro-mechanical model is built and validated with measurements on a devised prototype. At a wind speed of 5.5 m/s and base acceleration of 0.1 g, the proposed harvester improves the performance by widening the effective bandwidth by 300% compared to the linear counterpart without sacrificing the voltage level. The influences of nonlinearity configuration, excitation magnitude, and electromechanical coupling strength on the mechanical and electrical behavior are examined. The results of this paper form a baseline for future efficiency enhancement of energy harvesting from concurrent wind and base vibration utilizing monostable stiffness nonlinearities.

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http://hdl.handle.net/10453/166955