基于构架点头角速度的轨道垂向长波不平顺在线检测  

On-Line Detection of Vertical Long Wavelength Track Irregularities Using Bogie Pitch Rate

作　　者：邢宗义[1] 陈岳剑[2] 王晓浩[2] 秦勇[3] 贾利民[3] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094 [2]南京理工大学机械工程学院,江苏南京210094 [3]北京交通大学轨道交通控制与安全国家重点实验室,北京100044

出　　处：《中国铁道科学》2015年第4期32-39,共8页China Railway Science

基　　金：国家"八六三"计划项目(2011AA110501)

摘　　要：在分析比较基于轴箱垂向振动加速度和构架点头角速度的轨道垂向不平顺检测原理的基础上,提出基于构架点头角速度的轨道垂向长波不平顺在线检测方法。在运营车辆轴箱正上方的构架处安装陀螺仪,用于等空间采样构架点头角速度的时域信号;对构架点头角速度的时域信号以及由速度传感器测得的车速时域信号进行二次积分、消除拟合多项式的趋势项、带通滤波及递归最小二乘自适应补偿滤波等数据处理,从而得到轨道垂向长波不平顺的估计值;建立车辆—轨道垂向耦合动力学模型,以实测轨道垂向不平顺激励下的构架角速度模拟陀螺仪采集的时域信号,对给出的在线检测方法进行验证。结果表明:与实测结果相比,标准差小于0.4mm,归一化均方误差小于-8,说明给出的在线检测方法能精确、有效地检测轨道垂向长波不平顺。Based on the analysis and comparison of the on-line detection principle of vertical track irregular- ity by vertical axle-box acceleration and bogie pitch rate, a method for on-line detecting long wavelength track irregularities using bogie pitch rate was proposed. The gyro sensor was installed on the bogie right over the axle-box for equal spatial sampling the tlme-domain signal of bogie pitch rate from an in-service vehicle. For the time-domain signal of bogie pitch rate and vehicle velocity signal which was sampled from velocity sensor, double integration, polynomial based baseline correction, the bandpass filter and recursive least squares adaptive compensation filter were applied step by step to obtain the estimated values of verti- cal long wavelength track irregularities. A coupling dynamics model of vertical vehicle-track interactions was developed first, and then the bogie pitch rate was obtained with gyro sensor when the model was ex- cited by a segment of actual measured track irregularities. At last, the detection results of track irregulari- ties were obtained and the proposed on-line detection method was validated. Compared with measured irregularities, the standard deviation was less than 0.4 mm and the normalized mean square error was less than --8. The comparative results show that the proposed on-line detection method is capable of detecting the long wavelength track irregularities accurately and effectively.

关 键 词：在线检测 构架点头角速度 轨道不平顺 垂向不平顺 长波不平顺 信号处理 

分 类 号：U213.213[交通运输工程—道路与铁道工程] U216.3