一种基于偏心飞轮的运动转换器的研究与仿真

摘要

In this paper,a kind of eccentric flywheel is designed based on the nature of the force amplifying mechanism and the vibration effect of the eccentric rotation.The motion transformer is applied to the vibration isolation system.By giving the system certain harmonic excitation and using Matlab numerical simulation,the amplitude-frequency curve is obtained.Comparing with common vibration isolation system,it is found that the motion transformer mentioned in this paper can broaden the amplitude frequency curve of the system in the resonance region,and greatly reduce the resonance peak of the system.On the other hand,random excitation is given for simulating the real situation better,the displacement response of the system is acquired and the standard deviation of displacement and attenuation ratio of the system is figured out.It is found that the system can achieve better damping effect than the normal shock absorber.%根据惯容器是一种力放大机构的本质,同时又根据偏心轮转动时的激振效果,设计出了一种偏心飞轮的运动转换器.将该运动转换器元件应用于减振系统,通过给定系统一定简谐激励,利用Matlab数值仿真,得出系统的幅频曲线.通过与普通减振系统对比,发现所提及的运动转换器元件可以使系统的幅频曲线在共振区域拓宽,并极大地减小了系统的共振峰.另一方面,为了更真实地模拟现实情况,给予了系统一定的随机激励,求解出系统的位移响应,总结了系统位移方差及其衰减比,发现在随机激励的作用下系统比普通的减振器有更好的减振效果.