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.
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Peña Rosselló, J.I., Wio, H.S., Deza, R.R. et al. Enhancing energy harvesting by coupling monostable oscillators. Eur. Phys. J. B 90, 34 (2017). https://doi.org/10.1140/epjb/e2017-70703-x
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DOI: https://doi.org/10.1140/epjb/e2017-70703-x