Enhanced Vibrational Energy Harvesting Using Non-linear Stochastic Resonance
نویسندگان
چکیده
Stochastic resonance has seen wide application in the physical sciences as a tool to understand weak signal amplification by noise. However, this apparently counterintuitive phenomenon does not appear to have been exploited as a tool to enhance vibrational energy harvesting. In this note we demonstrate that by adding periodic forcing to a vibrationally excited energy harvesting mechanism, the power available from the device is apparently enhanced over a mechanism without periodic forcing. In order to illustrate this novel effect, a conceptually simple, but plausible model of such a device is proposed to explore the use of stochastic resonance to enhance vibrational energy harvesting. ∗ Corresponding author. Email address: [email protected] (C.R. McInnes). Preprint submitted to Journal of Sound and Vibration 25 June 2008
منابع مشابه
A broadband vibrational energy harvester
We propose a design for an energy harvester which has the potential to harvest vibrational energy over a broad range of ambient frequencies. The device uses two flexible ceramic piezoelectric elements arranged in a buckled configuration in the absence of vibrations. Experimental data show that this design allows enhanced harvesting of energy relative to a comparable cantilever design, both for ...
متن کاملActive and Reactive Power in Stochastic Resonance for Energy Harvesting
A power allocation to active and reactive power in stochastic resonance is discussed for energy harvesting from noise. It is confirmed that active power can be increased at stochastic resonance, in the same way of the relationship between energy and phase at an appropriate setting in resonance. key words: stochastic resonance, white Gaussian noise, energy harvesting, active and reactive power, ...
متن کاملOn the stochastic excitation of monostable and bistable electroelastic power generators: Relative advantages and tradeoffs in a physical system
Numerical and experimental investigations of broadband random vibrational energy harvesting using monostable and bistable piezoelectric cantilevers are presented along with relative performance comparisons. Simulations and experiments reveal that a linear-monostable energy harvester can outperform its bistable counterpart for very low and relatively high random excitation levels. The bistable c...
متن کاملThe magnetic coupling of a piezoelectric cantilever for enhanced energy harvesting efficiency
It is shown that the energy harvesting capabilities of a piezoelectric cantilever can be enhanced through coupling to a static magnetic field. A permanent magnet is fixed to the end of a piezoelectric cantilever, causing it to experience a non-linear force as it moves with respect to a stationary magnet. The magnetically coupled cantilever responds to vibration over a much broader frequency ran...
متن کاملAntenna Design and Non Linear Simulation of Rectifier for Wideband and Multi-Tone Radio Frequency Energy Harvesting
In this paper, a wideband rectenna without using matching networks is presented. In addition of wide bandwidth, the omnidirectional radiation pattern, maximum radio frequency to dc conversion efficiency, harvesting capability of the minimum input power level, easy fabrication process cause this antenna be a good choice for radio frequency energy harvesting applications. Matching network has bee...
متن کامل