[1]李再帏,练松良.改进HHT方法在轨道不平顺信号分析中的应用[J].深圳大学学报理工版,2012,29(No.3(189-282)):270-275.[doi:10.3724/SP.J.1249.2012.03270]
　LI Zai-wei and LIAN Song-liang.Analysis of track irregularity signal by improved Hilbert-Huang transform[J].Journal of Shenzhen University Science and Engineering,2012,29(No.3(189-282)):270-275.[doi:10.3724/SP.J.1249.2012.03270]
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改进HHT方法在轨道不平顺信号分析中的应用()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第29卷
期数:
2012年No.3(189-282)
页码:
270-275
栏目:
交通物流
出版日期:
2012-05-21

文章信息/Info

Title:
Analysis of track irregularity signal by improved Hilbert-Huang transform
作者:
李再帏; 练松良
同济大学道路与交通工程教育部重点实验室，上海 201804
Author(s):
LI Zai-wei and LIAN Song-liang
Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, P.R.China
关键词:
铁路轨道; 信号处理; 神经网络; 希尔伯特-黄变换; 经验模态分解法; 端点效应; 不平顺
Keywords:
railroad tracks;  signal processing;  neural network;  Hilbert-Huang transform;  empirical mode decomposition;  end effect;  irregularity
分类号:
U 216.3
DOI:
10.3724/SP.J.1249.2012.03270
文献标志码:
A
摘要:
针对希尔伯特-黄变换(Hilbert-Huang transform, HHT)中经验模态分解法（empirical mode decomposition，EMD）的端点效应问题，提出一种镜像延拓和灰色神经网络预测法相结合的改进方法，即先对信号进行灰色神经网络延拓，再利用镜像延拓法对数据进行延拓．分析仿真信号和实际轨道不平顺信号认为，该方法可以有效抑制EMD的端点效应．利用改进HHT方法对轨道轨距和水平不平顺信号进行研究，结果表明，该方法可有效去除轨道轨距和水平不平顺中低频趋势项，提高轨道不平顺信号的精度，有利于轨道质量的评价．
Abstract:
To solve the problem of end effects of empirical mode decomposition (EMD) in Hilbert-Huang transform, a method combining gray neural network with mirror extension as to the ends of data is presented, in which the original time series was extended by means of gray neural network, and subsequently, by mirror extension method. The comparative results of the simulated signal and the actual detected track irregularity signal indicated that the improved algorithm restrained the end effect effectively. The method was applied to analyzing the track irregularity signal. Results show that by removing the trend of track gauge and cross level irregularity, this method can improve the accuracy of track irregularity, which is beneficial to track quality evaluation.

参考文献/References:

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备注/Memo

备注/Memo:
Received：2011-03-28；Revised：2011-07-12；Accepted：2011-11-04
Foundation：National Natural Science Foundation of China (50878158)； Foundation of Engineering Research Center of Railway Environmental Vibration and Noise, Ministry of Education (20091001)
Corresponding author：Professor LIAN Song-liang. E-mail: liansl6634@126.com
Citation：LI Zai-wei，LIAN Song-liang. Analysis of track irregularity signal by improved Hilbert-Huang transform ［J］. Journal of Shenzhen University Science and Engineering, 2012, 29(3): 270-275.（in Chinese）
基金项目：国家自然科学基金资助项目(50878158)；铁路环境振动与噪声教育部工程研究中心开放研究资助项目（20091001）
作者简介：李再帏（1983-），男（汉族），吉林省白城市人，同济大学博士研究生． E-mail：lzw_5220964@163.com
引文：李再帏，练松良. 改进HHT方法在轨道不平顺信号分析中的应用［J］. 深圳大学学报理工版，2012，29（3）：270-275.
更新日期/Last Update: 2012-05-28