压电叠堆式发电装置的建模与仿真分析  

Modeling and Simulation of a Piezoelectric Stacked Generator

作　　者：王光庆[1] 

机构地区：[1]浙江工商大学,杭州310018

出　　处：《中国机械工程》2009年第19期2298-2304,共7页China Mechanical Engineering

基　　金：浙江省自然科学基金资助项目(Y1080037);浙江省教育厅科研项目(20070636)

摘　　要：提出一种利用压电叠堆进行机电能量转换的压电发电装置,并采用压电振动理论和杆的波动理论建立了发电装置的机电耦合分析模型以及输出电压、电流与压电叠堆受力之间的关系表达式。基于该模型研究了压电叠堆结构尺寸、材料参数、外力激振频率和幅值、系统惯性质量和弹簧刚度等对装置发电性能的影响规律。研究结果表明:外力激振幅值越大,压电叠堆产生的输出电压也大,当激振信号频率与装置的谐振频率一致时,发电装置的输出电压、输出电流达到最大;在激振信号频率一定的情况下,当压电叠堆的长度和截面面积满足其频率方程时,压电叠堆将产生谐振,此时,其输出电压、输出电流最大;当发电装置的负载与其阻抗匹配时,发电装置的机电转换效率达到最大。A piezoelectric generator based on the piezoelectric stack electro-mechanical energy conversion was proposed.The electro-mechanical coupling model of the generator and the relationship between the deduced voltage and the exciting force of the stack were deduced based on the piezoelectric vibration theory and one-dimensional wave theory.The effects on the power performance of piezoelectric stack physical parameters,such as the amplitude and frequency of the force,the mass and the stiffness of the mechanical system were studied.The research results show that the bigger the force,the larger the power ability,and when the frequency of the exciting force is according with the resonant frequency of the generator,the power ability of the generator is maximum.And if the length and area of the piezoelectric stack is suitable for the resonant frequency of the generator,the power ability is maximum.Moreover,if the load impedance matches the equivalent impedance of the generator,the electro-mechanical energy conversion efficiency of the generator is maximum.

关 键 词：压电叠堆 压电发电 波动理论 机电能量转换 

分 类 号：TH132[机械工程—机械制造及自动化] TN384[电子电信—物理电子学]