Analysis and design of a nonlinear vibration-based energy harvester - a frequency based approach

Conference item


Uchenna, Diala, Simon, Pope and Lang, Zi-Qiang 2017. Analysis and design of a nonlinear vibration-based energy harvester - a frequency based approach. IEEE. https://doi.org/10.1109/aim.2017.8014239
AuthorsUchenna, Diala, Simon, Pope and Lang, Zi-Qiang
Abstract

The benefits of nonlinear damping in increasing the amount of energy (power) harvested by a vibration-based energy harvester (VEH) has been reported where it was revealed that more energy can be harvested using nonlinear cubic damping when compared to a VEH with linear damping. As has been reported, this only occurs when the base excitation on the VEH, at resonance, is less than the maximum base excitation. A maximum harvester base excitation results in a maximum distance the harvester mass can move due to its size and geometric limitations. The present study is concerned with the analysis and design of a VEH using a nonlinear frequency analysis method. This method employs the concept of the output frequency response function (OFRF) to derive an explicit polynomial relationship between the harvested energy (power) and the parameter of the energy harvester of interest, i.e. the nonlinear cubic damping coefficient. Based on the OFRF, a nonlinear damping coefficient can be designed to achieve a range of desired levels of energy harvesting. It is also shown that using the OFRF the harvester throw (the displacement of the mass of the harvester), can be predicted using the designed damping coefficient.

KeywordsDamping , Resonant frequency , Frequency response , Shock absorbers , Analytical models , Vibrations , Tuning
Year2017
Journal2017 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)
IEEE International Conference on Advanced Intelligent Mechatronics (AIM)
PublisherIEEE
ISSN9781509059980
9781509060009
Digital Object Identifier (DOI)https://doi.org/10.1109/aim.2017.8014239
Web address (URL)http://hdl.handle.net/10545/624681
hdl:10545/624681
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File Access Level
Open
Publication dates24 Aug 2017
Publication process dates
Deposited07 Apr 2020, 15:26
Accepted2017
ContributorsUniversity of Sheffield
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