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A multiple degree-of-freedom velocity-amplified vibrational energy harvester Part B: modelling

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Show simple item record Nico, Valeria O'Donoghue, Declan Frizzell, Ronan Kelly, Gerard Punch, Jeff 2021-11-02T09:22:36Z 2021-11-02T09:22:36Z 2014
dc.description peer-reviewed en_US
dc.description.abstract Vibrational energy harvesting has become relevant as a power source for the reduced power requirement of electronics used in wireless sensor networks (WSNs). Vibrational energy harvesters (VEHs) are devices that can convert ambient kinetic energy into electrical energy using three principal transduction mechanisms: piezoelectric, electromagnetic and electrostatic. In this paper, a macroscopic two degree-of-freedom (2Dof) nonlinear energy harvester, which employs velocity amplification to enhance the power scavenged from ambient vibrations, is presented. Velocity amplification is achieved through sequential collisions between free-moving masses, and the final velocity is proportional to the mass ratio and the number of masses. Electromagnetic induction is chosen as the transduction mechanism because it can be readily implemented in a device which uses velocity amplification. The experimental results are presented in Part A of this paper, while in Part B three theoretical models are presented: (1) a coupled model where the two masses of the non-linear oscillator are considered as a coupled harmonic oscillators system; (2) an uncoupled model where the two masses are not linked and collisions between masses can occur; (3) a model that considers both the previous cases. The first two models act as necessary building blocks for the accurate development of the third model. This final model is essential for a better understanding of the dynamics of the 2-Dof device because it can represent the real behaviour of the system and captures the velocity amplification effect which is a key requirement of modelling device of interest in this work. Moreover, this model is essential for a future optimization of geometric and magnetic parameters in order to develop a MEMS scale multi-degree-of-freedom device. en_US
dc.language.iso eng en_US
dc.publisher ASME: The American Society of Mechanical Engineers en_US
dc.relation.ispartofseries Proceedings of the ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bioinspired Smart Materials and Systems; Energy Harvesting;2, V002T07A011
dc.rights Copyright © 2014 by ASME. Permission granted to place author accepted version in ULIR, en_US
dc.subject energy harvester en_US
dc.subject transduction mechanisms en_US
dc.title A multiple degree-of-freedom velocity-amplified vibrational energy harvester Part B: modelling en_US
dc.type info:eu-repo/semantics/conferenceObject en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1115/SMASIS2014-7511
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor IRC en_US
dc.contributor.sponsor EI en_US
dc.relation.projectid 10/CE/I1853 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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