Performance improvement of the stochastic-resonance-based tri-stable energy harvester under random rotational vibration

IF 3.2 3区工程技术 Q2 MECHANICS Theoretical and Applied Mechanics Letters Pub Date : 2022-09-01 DOI:10.1016/j.taml.2022.100365

Tingting Zhang , Yanfei Jin , Yanxia Zhang

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引用次数: 2

Abstract

In this paper, the stochastic-resonance-based tri-stable energy harvester (TEH) is proposed to enhance harvesting performance under random rotational vibration. An electromechanical coupled system interfaced with a standard rectifier circuit driven by colored noise is considered. The stationary probability density function (SPDF) of the harvester is obtained by the improved stochastic averaging. Then, with the adiabatic approximation theory, the analytical expression of signal-to-noise ratio (SNR) for the TEH is deduced to characterize stochastic resonance (SR). To enhance direct current (DC) power delivery from a rotational TEH, the influences of system parameters on SR is discussed. The obtained results suggest that there are damping-induced resonance and noise-intensity-induced SR in the tri-stable system. The TEH has higher harvesting performance under the optimal SR. That is, the optimal parameter combinations can induce optimal SR and maximize harvesting performance. Thus, the stochastic-resonance-based TEH can be optimized to enhance energy harvesting through choosing the optimal parameter.

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随机旋转振动下基于随机共振的三稳定能量采集器性能改进

为了提高随机旋转振动下的能量采集性能，提出了基于随机共振的三稳定能量采集器(TEH)。考虑了一种以有色噪声驱动的标准整流电路为接口的机电耦合系统。采用改进的随机平均方法，得到了收割机的平稳概率密度函数。然后，利用绝热近似理论，推导了热电偶的信噪比解析表达式，以表征热电偶的随机共振。为了提高旋转TEH的直流输出功率，讨论了系统参数对SR的影响。结果表明，三稳定系统存在阻尼诱发共振和噪声强度诱发SR。在最优SR下，TEH具有更高的收获性能，即最优的参数组合可以诱导最优SR和最大的收获性能。因此，可以通过选择最优参数对基于随机共振的TEH进行优化，以增强能量收集。

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来源期刊

Theoretical and Applied Mechanics Letters MECHANICS-

CiteScore

6.20

自引率

2.90%

发文量

545

审稿时长

12 weeks

期刊介绍： An international journal devoted to rapid communications on novel and original research in the field of mechanics. TAML aims at publishing novel, cutting edge researches in theoretical, computational, and experimental mechanics. The journal provides fast publication of letter-sized articles and invited reviews within 3 months. We emphasize highlighting advances in science, engineering, and technology with originality and rapidity. Contributions include, but are not limited to, a variety of topics such as: • Aerospace and Aeronautical Engineering • Coastal and Ocean Engineering • Environment and Energy Engineering • Material and Structure Engineering • Biomedical Engineering • Mechanical and Transportation Engineering • Civil and Hydraulic Engineering Theoretical and Applied Mechanics Letters (TAML) was launched in 2011 and sponsored by Institute of Mechanics, Chinese Academy of Sciences (IMCAS) and The Chinese Society of Theoretical and Applied Mechanics (CSTAM). It is the official publication the Beijing International Center for Theoretical and Applied Mechanics (BICTAM).