V型双稳态压电发电机建模与输出特性分析

Dynamic Modeling and Output Characteristic Analysis of a V-shaped Bistable Piezoelectric Generator

为对真实环境中宽带低频的振动能量实现有效收集,设计了一种不含磁铁的V型结构双稳态压电发电机,给出了压电发电机的机-电转换模型,并对输出特性进行了仿真分析。结果表明,初始夹角在一定范围内时,V型压电发电机发生随机共振,系统有效收集宽带低频的振动能量。该结构不含磁铁,有利于微型化和集成化。

For harvesting effectively the broadband and low-frequency vibration energies in real environment,a Vshaped bistable piezoelectric generator which does not contain magnet is designed in this work.And it′s mechanicalelectric transfer model is established.The output characteristic of the piezoelectric generator is simulated and tested.The results showed that the V-shaped piezoelectric generator can generate stochastic resonance when the initial angle is within a certain range,and the system can effectively harvest the broadband low frequency vibration energies.The structure of V-shaped piezoelectric generator does not contain magnets,so,it is easy to realize miniaturization and integration.