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首页> 外文会议>DAAAM International Symposium on Intelligent Manufacturing and Automation >COUPLED ELECTROMECHANICAL NUMERICAL MODELLING OF PIEZOELECTRIC VIBRATION ENERGY HARVESTERS
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COUPLED ELECTROMECHANICAL NUMERICAL MODELLING OF PIEZOELECTRIC VIBRATION ENERGY HARVESTERS

机译：压电振动能量收割机的耦合机电数值模型

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摘要

Energy harvesting is the process of collecting low-level ambient energy and converting it into electrical energy to be used for powering miniaturized autonomous devices, sensor networks, wearable electronics or Internet-of-Things components. The use of the pervasive kinetic energy, converted into electrical energy, is of special interest in this frame. The possibility to use bimorph piezoelectric cantilevers to convert ambient vibrations to electrical energy is therefore thoroughly analyzed in this work. A reliable modelling tool for optimizing the design of the miniature harvesters to be used in a broad frequency range, while maximizing the obtained powers, is hence needed. The problem complexity is induced by the necessity to simulate the dynamic response of the considered harvesting devices via a coupled electromechanical model. The recently developed comprehensive coupled analytical model based on distributed parameters is thus used as a benchmark to verify and tune suitable finite element (FE) numerical models. Modal (allowing to determine the mechanical dynamic response and the respective eigenfrequencies), harmonic (resulting in coupled frequency response functions) as well as linear and nonlinear transient FE analyses (resulting in dynamic responses under forced excitation at discrete time steps, including geometric nonlinearities) are therefore performed and complex dynamics effects are observed.
机译：能量收集是收集低级环境能量并将其转换成电能的过程，以用于为小型化的自主设备，传感器网络，可穿戴电子产品或物联网组成供电。使用普遍的动能，转化为电能，对该框架具有特殊兴趣。因此，在这项工作中彻底分析了使用Bimorph压电悬漏器将环境振动转换为电能的可能性。因此，用于优化在宽频率范围内使用的微型收割机设计的可靠建模工具，同时需要最大化所获得的功率。通过耦合机电模型模拟所考虑的收获装置的动态响应，引起问题复杂性。因此，基于分布式参数的最近开发的综合耦合分析模型用作验证和调整合适的有限元（FE）数值模型的基准。模态（允许确定机械动态响应和相应的特征频率），谐波（导致耦合频率响应函数）以及线性和非线性瞬态Fe分析（导致在离散时间步骤下强制激励下的动态响应，包括几何非线性）因此，观察到复杂的动力学效应。

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