作者：刘伟, 苏燕辰, 凌世波, 傅莉萍

作者单位：西南交通大学机械工程学院, 四川成都 610031

关键词：磁悬浮; 长波不平顺; 时频分析; 频域积分; 提取

摘要：

根据磁浮轨道线路信号的非平稳特性,采用时频分析方法分析轨道信号中长波不平顺信号是否存在,作用的位置在哪儿,空间频率是多少等。采用小波分析实现长波信号的提取,最后将长波加速度信号进行积分计算,得出位移幅值,判断出长波出现的位置。从频域方面进行了二次积分算法设计,较好地实现了积分过程。

Analysis and extraction of long-wave irregularity signal of maglev railway

LIU Wei, SU Yan-chen, LING Shi-bo, FU Li-ping

School of Mechanical and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract: Time-frequency analysis method was used to analyze the maglev railway trace signals.Because of the non-stationary feature of the maglev railway, it analyzed if the long-wave irregularity signals existed or not, and where it exist, including its frequency.Wavelet analysis was used to extract the long-wave irregularity signals.Finally, long-wave accelerating signals were integrated, displacement amplitude was calculated and location of long-wave appeared was determined.Algorithm of quadratic integral was designed from the frequency domain with better implement of integration process.

Keywords: Maglev; Long-wave irregularity; Time-frequency analysis; Frequency-domain integral; Extraction

2009, 35(5): 105-108  收稿日期: 2009-3-1;收到修改稿日期: 2009-5-8

基金项目: 

作者简介: 刘伟(1985-),女,硕士研究生,专业方向为测试计量技术及仪器。

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