铁路接触网最优主动控制研究

研究目的:本文为研究主动控制对接触网性能的影响,建立了接触网有限元模型,应用Ansys软件计算模型的整体质量及刚度矩阵数据,并利用KMExtract程序分离出整体质量、整体刚度矩阵,据此建立接触网系统动力学方程。为便于系统仿真及控制器设计,使用模态降阶法对系统降阶并将其转化为状态方程形式,而后为系统设计LQR控制器,使用simulink对实施主动控制前后的接触网系统进行动态仿真分析。研究结论:研究表明:(1)对接触网实施主动控制能有效改善其振动特性,接触网振动的最大值、最小值有较大降低,幅度达90%以上,均方差也有较大下降,幅度达70%以上,系统性能得到了极大提升。(2)在通过改变弓网自身参数的方法改善弓网性能遇到瓶颈时,接触网的主动控制或半主动控制将成为改善弓网性能的重要手段。

Research on Optimal Active Control of Railway Caternary

Research purposes: In order to research the influence of the active control on the property of the railway catenary,the finite element model for the catenary is established,the whole quality of the model and the stiffness matrix data are calculated with Ansys software,the whole quality and whole stiffness matrix are resolved with KMExtract program.With these,the dynamics equation is established for the catenary.In order to simulate the system and design the controller easily,the modal reduction order method is used to reduce the system order and transform it into the equation of state for designing the LQR controller for the system,and the simulation analysis of the states of the catenary before and after taking the active control is made with siimulink. Research conclusions:The research shows:(1)Taking the active control of the catenary can improve its vibration property.The maximum and minimum vibration values of the catenary can be cut by above 90%,and the mean square deviation can be cut by 70%.Therefore,the system property is much improved.(2) The active or semi-active control of the catenary becomes the important way to improve the catenary property when it is difficult to improve the catenary property by changing the catenary parameters.