Enabling technologies for harvesting ambient vibration energy have attracted considerable attention in research communities from different disciplines in the last decades. Among the various devices, straight cantilever-based energy harvesters have been widely investigated from the perspective of designs, modeling, simulation and experiments. In this study, we propose curved piezoelectric energy harvesters (PEHs) with variable curvature to further broaden application scenarios. Within the framework of the Euler–Bernoulli beam theory, we develop a distributed-parameter electromechanical coupling model for a curved segmented unimorph with variable curvature by Hamilton’s Principle and solve it using the Rayleigh–Ritz method. The convergence and accuracy of the model are validated by finite element simulation and experiments. Based on the proposed model, we perform a systematic parameter study and discuss the effects of the proof mass, Young’s modulus of the substrate, the thickness...

中文翻译：

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变曲率压电能量收集器的分布参数机电耦合模型

在过去的几十年中，用于收集环境振动能量的使能技术引起了来自不同学科的研究界的极大关注。在各种设备中，已经从设计，建模，仿真和实验的角度对基于直悬臂的能量收集器进行了广泛研究。在这项研究中，我们提出了具有可变曲率的弯曲压电能量收集器（PEH），以进一步拓宽应用场景。在欧拉-伯努利梁理论的框架内，我们利用汉密尔顿原理为变曲率的弯曲分段单压电晶片建立了分布参数机电耦合模型，并使用瑞利-里兹方法进行求解。通过有限元仿真和实验验证了模型的收敛性和准确性。