摘要
该文在通常的双稳态变势能函数压电俘能器中,通过在运动磁铁的两侧分别加装固定磁铁的方式,提出了一种多稳态变势能函数压电俘能器结构。基于扩展的哈密顿原理建立了俘能器的动力学方程,分析了系统的势能函数的变化规律,研究了俘能器在简谐激励下的动力学特性和俘能特性。结果表明,多稳态对称变势能函数压电俘能器在较高的外频激励下具有较好的俘能性能,而多稳态非对称变势能函数压电俘能器在低频的外激励下也具有较好的俘能性能。
In this paper,a multi-stable piezoelectric energy harvester with variable potential function was proposed by mounting a fixed magnet on each side of moving magnet in a normal bi-stable piezoelectric energy harvester with variable potential function.Employing the extended Hamiltonian principle,the dynamic equation of the energy harvester was established,and the variation of potential function of the system was exploited,the dynamic characteristics and energy harvesting characteristics of the harvester under harmonic excitation were also analyzed.The results show that the multi-stable piezoelectric energy harvester with symmetric variable potential function has good performance under high frequency of excitation,but the one with asymmetric variable potential function also performs good under low-frequency of excitation.
作者
孙德华
谢进
秦承武
杨磊
刘景阳
SUN De-hua;XIE Jin;QIN Cheng-wu;YANG Lei;LIU Jing-yang(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2022年第6期55-61,共7页
Instrument Technique and Sensor
基金
国家自然科学基金资助项目(51575457)。
关键词
压电俘能器
多稳态
非对称势能函数
变势能函数
简谐激励
piezoelectric energy harvester
multi-stable state
asymmetric potential energy function
variable potential energy function
harmonic excitation