Frequency-Dependent Model For Rail In Track Circuit
Track circuit is a crucial part of the train control system. It is of great significance to establish a refined track circuit model for fault diagnosis, which is important for ensuring the train’s safety. However, the skin effect and frequency-dependent characteristics of rail component, etc., are not considered in all pre-existing track circuit models. It is one of the major problems in the fields of track circuit modeling, causing an obvious error, especially in the case of mixed frequency and wide frequency signals. In order to overcome such a defect, this paper first verifies the approximate linearity of the rail without traction current based on the finite-element simulation and practical measurement. Then via system identification, the transfer function of the rail as well as its equivalent frequency-dependent circuit model is established. Finally, the accuracy of the model is testified by the measured data. The measurement and simulation experiment results reveal that the presented model is of high enough accuracy in mixed frequency and wide frequency signal condition, which satisfies the requirement of track circuit fault diagnosis.
Track circuit Frequency-dependent model of rail Finite-element method System identification method
Jiaxiang Xu Wei Dong Yingdong Ji Xiaobin Xu
Department of Automation, Tsinghua University, Beijing 100084, China National Laboratory for Informa National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, Chi School of Automation, Hangzhou DianZi University, Hangzhou 310018, China
国内会议
厦门
英文
1-7
2012-08-01（万方平台首次上网日期，不代表论文的发表时间）