单晶和双晶压电采集器时域响应的数值分析

Yelda Veli, Claudia Săvescu, A. Morega, D. Comeagă
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引用次数: 0

摘要

本文采用数值模拟的方法,对单晶片和双晶片压电采集器的输出功率进行了评估。期望的正弦电压是在时间相关的研究中获得的,其时间步长对应于进行特征频率研究后发现的特征频率。得到的终端电压符合欧拉-伯努利梁理论和压电层与中性纤维的距离。通过在电场问题上增加一个电路节点,形成一个封闭的内部电路,得到一个统一的正弦电压响应,与输入振动信号一致。一个多层(通常是两层或四层)的压电结构的各层之间的独立电压无法在实验中观察到,因为一个收割机只有两个端子,从所有的层中选择整体的电响应,给出一个单一的交流电压输出。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
NUMERICAL ANALYSES ON THE RESPONSES OF UNIMORPH AND BIMORPH PIEZOELECTRIC HARVESTERS IN TIME DOMAIN
The paper presents the assessment of the electric output rendered by a unimorph and a bimorph piezoelectric harvester, with one and two active piezoceramic wafers, using numerical simulations. Expected sinusoidal voltages were obtained in a time-dependent study, with a time step corresponding to the eigenfrequency found after conducting an Eigenfrequency study. The terminal voltages obtained agree with the Euler-Bernoulli beam theory and with the distance of the piezoelectric layers from the neutral fiber. By adding an electric circuit node to the electric field problem to form a closed internal circuit, a single unified sinusoidal voltage response should be obtained, coinciding with the input vibration signal. The independent voltages of the layers of a piezoelectric structure with more than one layer (usually two or four) cannot be observed experimentally, as a harvester has only two terminals that pick the overall electric response from all the layers, giving a single alternating voltage output.
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