多悬臂梁式压电振动发电机的多方向发电性能

摘要

为提高压电振动发电机对多方向振动环境的适应能力,研究了一种多悬臂梁式压电振动发电机的多方向发电性能问题。基于机械振动学理论和压电学理论,建立了多悬臂梁式压电振动发电机的发电模型,研究结果表明,在不同方向外界激励下,发电机都能产生一定的电能,且产生的最大电能达到128μJ,产生的最小电能约为38μJ,说明多悬臂梁式压电振动发电机在多方向振动环境中具有较强的适应能力,更容易获得较好的发电效果。%With the aim to enhance the energy conversion efficiency in the multi-direction vibra-tion environment,the problem of multi-direction generation performance for multi-cantilever-beam-type piezoelectric vibration generator (PVG)is studied.The generation model of the multi-cantilever-beam-type PVG is established on the basis of the mechanical vibration theory and the piezoelectricity theory.The results show that the multi-cantilever-beam-type PVG can generate more electricity as the excitation direction changing,and the maximum electric energy of the generator can reach 128μJ,the minimum electric energy is about 38μJ.It shows that the multi-cantilever-beam-type PVG has strong adaptability in the multi-direction vibration envi-ronment,and it is easier to obtain a better generation effect.