磁浮轨道长波不平顺信号的分析与提取

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

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。

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.