基于陀螺平台的摆式列车线路信息检测系统研究

Research on Gyroscope Platform Based Tilting Train Railway Line Information Inspection System

针对各国摆式列车采用的检测模式存在的问题,提出了基于单轴陀螺平台的摆式列车倾摆控制检测方法。所用陀螺平台由一个二自由度的挠性动力调谐陀螺和一个石英挠性加速度计组成的单轴平台系统。测量时,借助安装在头车车体地板上的单轴陀螺平台和车体与二系悬挂之间的两个位移传感器建立测量的水平基准线,可测量出列车过曲线时线路的超高值和曲线的曲率值,通过简单计算便可得到摆式列车倾摆控制所需未平衡离心加速度的大小,为倾摆控制提供量的信息。此外,陀螺平台系统良好的动态响应特性,为实时判断列车进、出曲线提供了可能。试验和仿真计算表明,该检测方法能够避免对加速度传感器信号直接滤波带来的延迟,满足摆式列车倾摆控制实时性的要求。

In view of existing problems of the inspection systems used by various countries for the tilting trains, the paper puts forward the new inspection method based on single-axis gyroscope platform, which consists of a two-degree freedom Flex-Dynamically Tuned Gyro and a Quartz-Flex accelerometer. With the single-axis gyroscope platform mounted on the floor of the first car and two displacement sensors between the car body and the secondary suspension, a measuring horizontal benchmark line is established. This measurement system not only can measure railway superelevation, but also the curvature, from which the unbalanced centrifugal acceleration is simply computed, providing the quantitative information for tilting control on curves. Furthermore, good dynamic characteristics of the gyroscope platform makes it possible to timely judge when it gets in and out of the curves. Both railway test and simulation show that this tilting control measurement method can satisfy the intime requirement of tilting train, avoiding the time delay caused by the direct filtering of the accelerometer sensors.