混沌振子双稳态悬臂梁俘能器特性研究

目前对双稳态悬臂梁俘能器的研究主要是基于受简谐激励或随机激励。提出Duffing振子混沌振动激励模型,将悬臂梁俘能器固定于Duffing振子上,振子的振动输出作为悬臂梁俘能器的动力输入。振子与悬臂梁俘能器构成一个两自由度非线性振动模型,建立了该模型运动微分方程。分析了单参数变化下,俘能器结构参数对俘能效果的影响。研究表明,在特定的混沌振动形式下,等效阻尼系数、等效刚度系数存在一个合理的取值区间以及最优等效负载电阻,使得俘能器俘能效果较好。

Study on the Characteristicsof Bi-Stable Cantilever Beam Energy Harvester Under Chaotic Oscillator

At present,the research on the bi-stable cantilever beam energy harvester is mainly based on harmonic or random excitation. A chaotic excitation model of Duffing oscillator is proposed. The energy harvester is fixed on the Duffing oscillator base,whose output of vibration is the power input of energy harvester. The oscillator and the energy harvester system constitute a two degree of freedom nonlinear vibration model,the differential equations of motion of the model are established.On the variation of single parameter,the influence of energy harvester structural parameters on effectiveness of energy harvesting has been analyzed. The results show that in the form of specific chaotic vibration,there exist reasonable value range of equivalent damping coefficient and stiffness coefficient and an optimal equivalent load resistance in which the effectiveness of energy harvesting is better.