Enhancement of tristable energy harvesting using stochastic resonance

Abstract

In this paper, stochastic resonance (SR) is exploited within a tristable electromechanical coupled system to enhance energy harvesting. Assuming that the eective capacitance of the piezoelectric element can be neglected, the coupled electromechanical equations are converted to a secondorder stochastic dierential equation. Using the adiabatic approximation and the linear response theory, the spectral amplification of the equivalent tristable mechanical system is obtained to characterize the SR. It is observed that the spectral amplification exhibits a maximum as a function of the nonlinear stiness coecients and noise intensity. That is, both parameter-optimized SR and traditional SR are found in this system, which can be used to amplify the amplitude of the system response and enhance the performance of nonlinear vibration energy harvesting. Moreover, the eciency in power conversion and the RMS voltage obtained under the SR eect are much higher than those harvested under ambient random vibration alone. The theoretical results are well verified through the numerical simulations of the original electromechanical coupled system.

Stochastic Resonance in Insulator-Metal-Transition Systems

“…Though the phenomena of stochastic resonance has been seen in biological experiments and in slow environmental changes, engineering applications based on this has been a few [9][10][11][12][13][14][15] . The fundamental principle of harvesting the noise power to empower the signal or the information content of the input can prove quite useful if used for practical purposes.…”

“…The phenomenon of SR in a multistable system and its application in fault-diagnosis in mechanical systems has been discussed in 12,13 . Further 14 and 15 provide an extensive discussion about the use of SR in enhancement of energy harvesting in electromechanical systems.…”

Enhanced energy harvesting using time-delayed feedback control from random rotational environment

“…Vibration energy harvester (VEH) has the ability of utilizing ambient vibration as energy source to harvest electrical power relying on a piezoelectric cantilever in direct piezoelectric effect of vibration-to-electricity conversion. Most solutions currently for enhancing harvested energy mainly focus on resonance behavior, in which case the vibration frequency is coincident to the natural frequency of VEH [1][2][3][4]. Traditionally, linear VEH is the common design type for simplicity [5].…”

Response Analysis of the Tristable Energy Harvester with an Uncertain Parameter

“…In the early stage, the resonant-based vibration harvesters have been widely used to generate energy, which could only achieve considerable energy harvesting performance at or near its resonant frequency [5,6]. To remedy this problem, many structural optimization designs [7,8] and technologies including resonance tuning technique [9][10][11][12], monostable technique [13][14][15][16][17], bistable technique [18][19][20][21][22] and tristable technique [23][24][25][26][27] have been proposed. Theoretical analysis and experimental results have shown that the nonlinear harvester could improve the ability to harvest energy under certain circumstances.…”