NDLI: On the influence of nonlinearities on vibrational energy transduction under band-limited noise excitations

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On the influence of nonlinearities on vibrational energy transduction under band-limited noise excitations

Content Provider	Scilit
Author	Nakano, K. Su, D. Zheng, R. Cartmell, M.
Copyright Year	2016
Description	Journal: Journal of Physics: Conference Series Vibrational energy harvesters are often excited by band-limited noise excitations. In this paper, the influence of the stiffness nonlinearity on the transduction of the energy harvester and the relative performance of linear, monostable hardening-type and bistable energy harvesters are compared and investigated. The performance is experimentally compared under band-limited noise excitations of different levels, bandwidths, and centre frequencies at first. The rms output power delivered to the same load resistance is measured and compared under the same excitation levels, which indicts the constant electrical damping level. It is shown that the effect of nonlinearities is strongly dependent on the excitation parameters. Under a moderate excitation level it is shown that the monostable hardening-type oscillator performs worse than its linear counterpart under band-limited excitation. However, the results also illustrate that for the most part of the frequency and bandwidth range considered, the bistable harvester can outperforms the linear variant but for around the peak output area. Moreover, the comparison is also numerically conducted with the consideration of the optimised electrical damping level and the displacement constraint of the device. General conclusions are drawn based on the experimental observations.
Related Links	http://iopscience.iop.org/article/10.1088/1742-6596/744/1/012078/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/744/1/012078
Journal	Journal of Physics: Conference Series
Volume Number	744
Language	English
Publisher	IOP Publishing
Publisher Date	2016-09-30
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Acoustics and Ultrasonics Mechanical Engineering Energy Harvesters Effect of Nonlinearities Band Limited Noise Limited Noise Excitations
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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