Adjustable Nonlinear Springs to Improve Efficiency of Vibration Energy Harvesters
Abstract
Vibration Energy Harvesting is an emerging technology aimed at turning mechanical energy from vibrations into electricity to power microsystems of the future. Most of present vibration energy harvesters are based on a mass spring structure introducing a resonance phenomenon that allows to increase the output power compared to non-resonant systems, but limits the working frequency bandwidth. Therefore, they are not able to harvest energy when ambient vibrations' frequencies shift. To follow shifts of ambient vibration frequencies and to increase the frequency band where energy can be harvested, one solution consists in using nonlinear springs. We present in this paper a model of adjustable nonlinear springs (H-shaped springs) and their benefits to improve velocity-damped vibration energy harvesters' (VEH) output powers. A simulation on a real vibration source proves that the output power can be higher in nonlinear devices compared to linear systems (up to +48%).
Keywords
Cite
@article{arxiv.1207.4559,
title = {Adjustable Nonlinear Springs to Improve Efficiency of Vibration Energy Harvesters},
author = {S. Boisseau and G. Despesse and B. Ahmed Seddik},
journal= {arXiv preprint arXiv:1207.4559},
year = {2015}
}
Comments
Please refer to paper "Nonlinear H-Shaped Springs to Improve Efficiency of Vibration Energy Harvesters", Journal of Applied Mechanics | Volume 80 | Issue 6, 2013 -- Paper No: JAM-12-1470; doi: 10.1115/1.4023961 -- for the published version of this article