基于多传感器加速度测量的轨道不平顺估计研究

Estimation of track irregularity based on multi-sensor acceleration measurement

轨道不平顺是产生列车振动的主要根源,对车辆轨道系统的安全和稳定性会造成潜在的风险。针对目前采用单个传感器较难达到对不同波段不平顺检测的问题,提出了一种基于构架姿态解算和未知输入观测器的轨道不平顺估计方法,通过多传感器测量车辆和转向架的动态响应来识别垂向和横向轨道不平顺。首先,分析了不同工况下构架位姿的运动特性以及轨道不平顺辨识的准确性,由超限位置的相关性可知轨道不平顺辨识方法可以准确地检测超限位置。其次,进行了实测轨道不平顺激励作用下的试验测试,通过与综合检测列车的轨道不平顺测量结果对比,表明该方法具有很好的准确性。因此,所提出的方法可以有效降低监视轨道基础设施的成本,同时可为后续轨道检测设备研发和工务养护维修等提供参考。

Track irregularity is the main source of the vibration of the vehicle system,which will cause potential risks to the safety and stability of the vehicle track system.Due to the difficulties to detect different irregularities of different bands with a single sensor,a track irregularity estimation method based on bogie attitude calculation and unknown input observer estimator was proposed.The vertical and lateral track irregularities were identified by measuring the dynamic responses of vehicles and bogies with distributed multi-sensors.Firstly,the motion characteristics of the bogie position and attitude and the accuracy of track irregularity identification under different working conditions were analyzed.According to the correlation of out of limit position,it can be foundn that track irregularity identification method can accurately detect out of limit position of track.At the same time,the experimental test is carried out under the action of the measured track irregularity excitation,and the comparison with the comprehensive detection of the train track irregularity measurement results shows that the method has a good accuracy.Therefore,the proposed method can effectively reduce the cost of monitoring track infrastructure,and provide a reference for the follow-up research and development of track detection equipment and public maintenance and repair.