The bandwidth of optimized nonlinear vibration-based energy harvesters

Cammarano, A. , Neild, S. A., Burrow, S. G. and Inman, D. J. (2014) The bandwidth of optimized nonlinear vibration-based energy harvesters. Smart Materials and Structures, 23(5), 055019. (doi:10.1088/0964-1726/23/5/055019)

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Abstract

In an attempt to improve the performance of vibration-based energy harvesters, many authors suggest that nonlinearities can be exploited to increase the bandwidths of linear devices. Nevertheless, the complex dependence of the response upon the input excitation has made a realistic comparison of linear harvesters with nonlinear energy harvesters challenging. In a previous work it has been demonstrated that for a given frequency of excitation, it is possible to achieve the same maximum power for a nonlinear harvester as that for a linear harvester, provided that the resistance and the linear stiffness of both are optimized. This work focuses on the bandwidths of linear and nonlinear harvesters and shows which device is more suitable for harvesting energy from vibrations. The work considers different levels of excitation as well as different frequencies of excitation. In addition, the effect of the mechanical damping of the oscillator on the power bandwidth is shown for both the linear and nonlinear cases.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cammarano, Dr Andrea
Authors: Cammarano, A., Neild, S. A., Burrow, S. G., and Inman, D. J.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Smart Materials and Structures
Publisher:IOP Publishing Ltd.
ISSN:0964-1726
ISSN (Online):1361-665X

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