Stochastic resonance has seen wide application in the physical sciences as a tool to understand weak signal amplification by noise. However, this apparently counter- intuitive phenomenon does not appear to have been exploited as a tool to enhance vibrational energy harvesting. In this note we demonstrate that by adding a periodic excitation to a damped energy harvesting mechanism, the power available from the device is apparently enhanced over a conventional unexcited mechanism. A simple model of such a device is proposed and investigated to explore the use of stochastic resonance to enhance vibrational energy harvesting.
- vibrational energy harvesting
- stochastic resonance
- mechanical engineering
McInnes, C., Gorman, D., & Cartmell, M. (2008). Enhanced vibrational energy harvesting using non-linear stochastic resonance. Journal of Sound and Vibration, 318(4-5), 655-662. https://doi.org/10.1016/j.jsv.2008.07.017