考虑反馈机构机电耦合的压下系统振动分析  

Vibration Analysis of Rolling Mill Servo Screwdown System

作　　者：靳宝全[1] 梁义维[2] 熊诗波[1] 程珩[1] 

机构地区：[1]太原理工大学机械电子工程研究所,太原030024 [2]太原理工大学机械学院,太原030024

出　　处：《振动．测试与诊断》2008年第2期91-95,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:50405043);山西省青年科技基金资助项目(编号:2006021021)

摘　　要：建立了考虑反馈机构机电耦合特性的伺服压下系统仿真模型,通过对模型的阶跃响应及振动时域与频域特性分析,表明该仿真模型与物理系统具有良好的一致性。通过对仿真模型的动力学参数修改,消除了模型自激振动,同时获得了满足工艺要求的控制特性。据此实施了实际系统的动力学参数修改,解决了反馈机构机电耦合造成的振动故障。The displacement feedback apparatus of rolling mill screwdown systems will generally cause abnormal vibration under eletromechanical coupling conditions.The results of vibration testing at a rolling mill site and dynamic parameter analysis found that one of the natural frequencies of its displacement feedback apparatus just coincided with that of the mill frame,which was easy to lead to self-excited vibration due to electromechanical coupling.A simulation model involving the electromechanical coupling of the feedback apparatus was constructed.Compared the analytical results of dynamic responces of the model to the vibration data measured on the mill,it showed that the dynamic behavior of the simulation model was in consistence with relevant physical system quite well.Some dynamic modifications to the simulation model were made,which eliminated its self-excited vibration and got the control charactoristics needed for technological requirements.According to the results,corresponding dynamic modifications to the physical system were also made,and the abnormal vibration problem was solved.

关 键 词：机电耦合 自激振动 轧机 反馈机构 动力学修改 

分 类 号：TN751.1[电子电信—电路与系统] O323[理学—一般力学与力学基础]