Costanzo Luigi, Lo Schiavo Alessandro, Sarracino Alessandro, Vitelli Massimo
Department of Engineering, University of Campania "Luigi Vanvitelli", 81031 Aversa, Italy.
Entropy (Basel). 2021 May 27;23(6):677. doi: 10.3390/e23060677.
We experimentally study a piezoelectric energy harvester driven by broadband random vibrations. We show that a linear model, consisting of an underdamped Langevin equation for the dynamics of the tip mass, electromechanically coupled with a capacitor and a load resistor, can accurately describe the experimental data. In particular, the theoretical model allows us to define fluctuating currents and to study the stochastic thermodynamics of the system, with focus on the distribution of the extracted work over different time intervals. Our analytical and numerical analysis of the linear model is succesfully compared to the experiments.
我们通过实验研究了由宽带随机振动驱动的压电能量采集器。我们表明，一个线性模型，由一个用于顶端质量块动力学的欠阻尼朗之万方程、与一个电容器和一个负载电阻机电耦合而成，能够准确地描述实验数据。特别地，该理论模型使我们能够定义波动电流，并研究系统的随机热力学，重点是不同时间间隔内提取功的分布。我们对线性模型的分析和数值分析与实验结果进行了成功比较。
