Enhancing energy harvesting by coupling monostable oscillators
Abstract
The performance of a ring of linearly coupled, monostable nonlinear oscillators is optimized towards its goal of acting as energy harvester---through piezoelectric transduction---of mesoscopic fluctuations, which are modeled as Ornstein--Uhlenbeck noises. For a single oscillator, the maximum output voltage and overall efficiency are attained for a soft piecewise-linear potential (providing a weak attractive constant force) but they are still fairly large for a harmonic potential. When several harmonic springs are linearly and bidirectionally coupled to form a ring, it is found that counter-phase coupling can largely improve the performance while in-phase coupling worsens it. Moreover, it turns out that few (two or three) coupled units perform better than more.
Cite
@article{arxiv.1612.09209,
title = {Enhancing energy harvesting by coupling monostable oscillators},
author = {J. I. Pena Rossello and H. S. Wio and R. R. Deza and P. Hanggi},
journal= {arXiv preprint arXiv:1612.09209},
year = {2017}
}
Comments
Accepted in EPJB, 5 pages