基于S变换的高速列车小幅蛇行识别方法
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摘要
针对现有的高速列车监测方法没有考虑高速列车振动信号的非平稳特性,从而使得列车出现蛇形失稳现象的问题,提出一种采用S变换的方法对高速列车转向架信号进行处理,进而提取高速列车运行特征。采用最小二乘支持向量机(LS-SVM)对特征进行训练和识别,结果证明,基于S变换的特征提取方法的识别准确率达到了100%,优于基于小波变换的特征提取方法,从而可以及时预测高速列车的运行状态,保障列车的运行安全。
For the problems that the existing high-speed train monitoring methods did not consider the non-stationary characteristics of vibration signals of the high-speed trains, which caused the trains to lose the hunting stability, based on S-transform a method was proposed to process the high-speed train bogie signals and then extract the features. The LS-SVM was utilized to train and identify the features. The results show that the recognition accuracy of the features based on S-transform is 100%, which is much better than that of the wavelet-transform-based method. Therefore, the proposed method may predict the running states of the high-speed trains in time and ensure the operation security of the trains.
For the problems that the existing high-speed train monitoring methods did not consider the non-stationary characteristics of vibration signals of the high-speed trains, which caused the trains to lose the hunting stability, based on S-transform a method was proposed to process the high-speed train bogie signals and then extract the features. The LS-SVM was utilized to train and identify the features. The results show that the recognition accuracy of the features based on S-transform is 100%, which is much better than that of the wavelet-transform-based method. Therefore, the proposed method may predict the running states of the high-speed trains in time and ensure the operation security of the trains.
引文
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[2]蔡里军.基于FPGA的高速列车转向架蛇行失稳检测装置[D].成都:西南交通大学,2012.CAI Lijun.A Real-time Monitoring System of High Speed Train Bogie Hunting Instability Based on FP-GA[D].Chengdu:Southwest Jiaotong University,2012.
[3]NING Jing,LIN Jianhui,ZHANG Bing.Timefrequency Processing of Track Irregularities in High-speed Train[J].Mechanical Systems and Signal Processing,2016,66:339-348.
[4]孙丽霞.高速列车横向运动稳定性和动态脱轨理论分析及评价方法研究[D].北京:中国铁道科学研究院,2014.SUN Lixia.Evaluation Method Study and Theory Analysis of Lateral Running Stability and Dynamic Derailment of High Speed Train[D].Beijing:China Academy of Railway Sciences,2014.
[5]张兵.列车关键部件安全监测理论与分析研究[D].成都:西南交通大学,2007.ZHANG Bing.Research on Key Components Security Monitoring of High-speed Railway Vehicle[D].Chengdu:Southwest Jiaotong University,2007.
[6]KAR S,SAMANTARAY S R.Time-frequency Transform-based Differential Scheme for Microgrid Protection[J].IET Generation,Transmission&Distribution,2014,8(2):310-320.
[7]林建辉.某型转向架蛇行异常振动报告[R].成都:西南交通大学,2011.LIN Jianhui.Bogie Hunting Report of Certain Highspeed Train[R].Chengdu:Southwest Jiaotong University,2007.
[8]铁道部运输局.高速动车组整车试验规范[S].北京:中华人民共和国铁道部,2008.Ministry of Railways of the People's Republic of China.High-speed EMU Vehicle Test Criterion[S].Beijing:Ministry of Railways of the People's Republic of China,2008.
[9]中华人民共和国铁道部.TB10761-2013高速铁路工程动态验收技术规范[S].北京:中华人民共和国铁道部,2013.Ministry of Railways of the People's Republic of China.TB10761-2013.High-speed Railway Engineering Dynamic Acceptance Technical Criterion[S].Beijing:Ministry of Railways of the People's Republic of China,2013.
[10]British Standards Institute.BS EN 14363Railway Applications-testing for the Acceptance of Running Characteristics of Railway Vehicles-testing of Running Behavior and Stationary Tests[S].Valenciennes:Interoperability Unit,2005.
[11]Official Journal of the European Union.2008/232/EC Concerning a Technical Specification for Interoperability Relating to‘Rolling Stock’Sub-system of the Trans-European High-speed Rail System[S].http://www.ojec.com/?aspxerrorpath=/contactus.aspx,2008.
[12]Federal Railroad Administration.Vehicle/Track Interaction Safety Standards.High-speed and High Cant Deficiency Operations[S].College Park:National Archives and Records Administration,2013.
[13]CNR Sifang Rolling Stock Research Institute.TB/T3188-2007 Technical Specification for Railway Car Safety Monitor and Diagnosis System[S].Beijing:China Railway Publishing House,2008.
[14]STOCKWELL R G,MANSINHA L,LOW R P.Localization of the Complex Spectrum:the S-transform[J].IEEE Transactions on Signal Processing,1996,44(4):998-1001.
[15]PARI J,KENNETH R,VASSILIS K.Data Mining an EEG Dataset with an Emphasis on Dimensionality Reduction[C]//Proceedings of the 2007IEEE Symposium on Computational Intelligence and Data Mining(CIDM 2007).Honolulu:405-412.