| 基于本征模函数的高速磁浮线路不平顺检测 |
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| 引用本文： | 苏燕辰,伍川辉. 基于本征模函数的高速磁浮线路不平顺检测[J]. 西南交通大学学报, 2011, 46(1): 92-97. DOI: 10.3969/j.issn.0258-2724.2011.01.014 |
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| 作者姓名： | 苏燕辰 伍川辉 |
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| 作者单位： | 西南交通大学机械工程学院,四川,成都,610031 |
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| 基金项目： | 国家863计划资助项目 |
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| 摘 要： | 为了评估磁浮线路的不平顺程度,对实测加速度信号进行分析,发现导向系统纵向振动加速度信号对磁浮线路不平顺长波最敏感.通过对导向系统纵向振动加速度信号进行Hilbert-Huang变换,提取对应长波频率的本征模函数,求得频率族的包络瞬时幅值和瞬时频率,提取了不平顺长波.用该方法分析磁浮列车以430 km/h运行时的实测数据,得到的磁浮线路长波不平顺信号与采用大地测量法测得的结果一致.
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| 关 键 词： | 高速磁悬浮列车 不平顺长波 Hilbert-Huang变换 本征模函数 |
Detecting High-Speed Maglev Line Irregularity Based on Intrinsic Mode Function Analysis |
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| SU Yanchen,WU Chuanhui. Detecting High-Speed Maglev Line Irregularity Based on Intrinsic Mode Function Analysis[J]. Journal of Southwest Jiaotong University, 2011, 46(1): 92-97. DOI: 10.3969/j.issn.0258-2724.2011.01.014 |
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| Authors: | SU Yanchen WU Chuanhui |
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| Affiliation: | SU Yanchen,WU Chuanhui(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | In order to assess the track irregularity of maglev lines,an analysis was made of the practical data of track-inspection acceleration signals of a high-speed maglev train,which indicates that the longitudinal vibration acceleration signal of the train guidance system is most sensitive to the long-wave irregularity of the maglev line.Hilbert-Huang transform is used to extract the intrinsic mode functions(IMFs) of the long-wave frequencies of the acceleration signals to obtain the instantaneous amplitude(enve... |
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| Keywords: | high-speed maglev train long-wave irregularity Hilbert-Huang transform intrinsic mode functions |
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