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Surfing the high energy output branch of nonlinear energy harvesters
American Physical Society
Hysteresis and multistability are fundamental phenomena of driven nonlinear oscillators, which, however, restrict many applications such as mechanical energy harvesting. We introduce an electrical control mechanism to switch from the low to the high energy output branch of a nonlinear energy harvester by exploiting the strong interplay between its electrical and mechanical degrees of freedom. This method improves the energy conversion efficiency over a wide bandwidth in a frequency-amplitude-varying environment using only a small energy budget. The underlying effect is independent of the device scale and the transduction method and is explained using a modified Duffing oscillator model.
Nonlinear oscillators , Hysteresis , Mechanical energy harvesting , Duffing oscillator model
Mallick, D., Amann, A., Roy, S., (2016) 'Surfing the high energy output branch of nonlinear energy harvesters'. Physical Review Letters, 117(19), 197701 (5pp). doi: 10.1103/PhysRevLett.117.197701
© 2016 American Physical Society. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Physical Review Letters, 117(19) and may be found at http://link.aps.org/doi/10.1103/PhysRevLett.117.197701