基于振幅稳定的原点反共振振动机动力学分析及其控制  

DYNAMICAL ANALYSIS AND CONTROL OF DRIVING POINT ANTI-RESONANT VIBRATING MACHINE BASED ON AMPLITUDE STABILITY

作　　者：刘杰[1] 李允公[1] 刘劲涛[1] 徐会希[2] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004 [2]中国科学院沈阳自动化研究所,沈阳110016

出　　处：《机械工程学报》2006年第1期145-148,共4页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(50075015)。

摘　　要：利用反共振原理可有效减小振动机械对基础的作用,提高振动机械的寿命。建立了原点反共振振动机的动力学模型,阐明了其工作原理。以工作体和下质体振幅稳定为核心,分析了各系统参数一定时质量比和反共振频率比对系统振幅稳定性的影响情况,得到了作为组合参数时质量比和反共振频率比分别与上下质体动力放大因子的关系曲面,由此可得到满足工艺要求并能保证振幅稳定的参数区间,为各类反共振振动机设计提供了重要依据。研究了物料质量波动对系统振幅稳定性的影响和反共振点的漂移情况,揭示了对反共振机激振频率进行控制的必要性。在合理动力学参数组合的前提下通过引入控制技术,有效地提高了反共振振动机的工作机体和下质体的振幅稳定性。The lifetime of vibrating machine can be improved and the load on the base can be decreased while using the theory of anti-resonance. The dynamic model of driving point anti-resonant vibrating machine is built, and the theory of this machine is clarified. In order to improve the amplitude stability of upper body and lower body, the influence of mass ratio and anti-resonance frequency ratio on amplitude stability is studied while other parameters are constant. The relation surfaces of parameters which combine mass ratio and anti-resonance frequency ratio with dynamic magnification factors of both upper body and lower body axe obtained. Therefore, the parameters zone that satisfies the technique requirement and assures the amplitude stability can be determined, which provides an important foundation for design of anti-resonant vibrating machine. When the material quality is fluctuant, the stability of system amplitude and the shift of anti-resonant frequency are analyzed, and the result reveals the necessity of controlling the excited frequency. The amplitude stability of anti-resonant vibrating machine＇s upper body and lower body has been improved effectively by using the control technology based on the reasonable dynamic parameters.

关 键 词：反共振 振动机械 振幅稳定 闭环控制 

分 类 号：TD156[矿业工程—矿山地质测量]