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首页> 外文期刊>JP Journal of Solids and Structures >ELECTROMECHANICAL MODEL FOR A PLATE TYPE ENERGY HARVESTER USING COUPLED STRAIN RATE DAMPING MECHANISM
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ELECTROMECHANICAL MODEL FOR A PLATE TYPE ENERGY HARVESTER USING COUPLED STRAIN RATE DAMPING MECHANISM

机译：耦合应变率阻尼机制的平板式能量捕集器机电模型

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Technological advancements in electronics have greatly reduced power requirements. The piezoelectric transduction mechanism has received a great attention in the energy harvesting field. It is perceived by many researchers that using piezoelectric transduction, vibration based energy harvesting technique is the best candidate to meet low power requirements. Only recently, a revised and accurate mathematical model was proposed to predict the energy output from a cantilever energy harvester. In many applications, piezoelectric transduction can also be used to harvest the ambient vibration energy from plate type structures. A simple example is a host structure subjected to out of plane periodic vibration. In this paper, a mathematical model is proposed for a vibrating plate used as an energy harvester. Strain rate damping and viscous damping were considered separately in the dynamic equation. Complete dynamic equation for the coupled system is formulated. A solution mechanism is proposed under a harmonic loading condition to decouple the system. Modal analysis is performed under a short circuit condition and the solution from the transcendental equation is used to calculate the modal parameters. The backward coupling term is then calculated using the modal coefficients and the explicit equation for the voltage output is presented. A comparative study is presented to demonstrate the significant difference of ignoring the strain rate damping and adopting the damping in the model. It was found that for the plate type harvesters, strain rate damping was able to estimate the voltage output more accurately than the existing models.
机译：电子技术的进步极大地降低了功率需求。压电换能机构在能量收集领域受到了极大的关注。许多研究人员认为，使用压电换能，基于振动的能量收集技术是满足低功率要求的最佳选择。直到最近，才提出了一种经过修订的精确数学模型来预测悬臂式能量收集器的能量输出。在许多应用中，压电换能器还可用于从板式结构中收集环境振动能量。一个简单的例子是承受平面外周期性振动的主体结构。本文提出了一种用作能量收集器的振动板的数学模型。动力学方程中分别考虑了应变率阻尼和粘性阻尼。建立了耦合系统的完整动力学方程。提出了一种在谐波负载条件下解耦系统的解决方案。在短路条件下进行模态分析，并使用先验方程的解来计算模态参数。然后使用模态系数计算反向耦合项，并给出电压输出的显式方程。进行了一项比较研究，以证明忽略应变率阻尼和在模型中采用阻尼的显着差异。已经发现，对于平板型收割机，应变率阻尼能够比现有模型更准确地估计电压输出。

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