基于三谱线插值FFT算法在列车失稳检测中的研究  

Train Instability Detection Based on Three Spectral Lines Interpolation FFT Algorithm

作　　者：郝洪伟[1] 刘灿[1] 李鹏[1] 

机构地区：[1]株洲南车时代电气股份有限公司,湖南株洲412001

出　　处：《机车电传动》2014年第5期95-98,共4页Electric Drive for Locomotives

摘　　要：针对传统的快速傅里叶变换(FFT)算法在进行列车振动频谱分析中存在栅栏效应和频谱泄漏现象,不能对列车振动加速度信号进行准确测量的问题,提出一种基于三根谱线来修正频率和幅值的计算方法,通过加窗和插值来改善计算的准确度。仿真证明了该算法的高精度和简单易实现的特点。According to conventional Fast Fourier Transform（FFT） algorithm not fit to analyze train vibration spectrum due to its leakage and picket fence effects, which could not detect train vibration acceleration accurately, an improved algorithm based on three spectral lines was presented using window functions and interpolation algorithms to correct the measurement. The simulation results had verified the effectiveness and practicability of the algorithm.

关 键 词：三谱线 快速傅里叶变换 插值 横向失稳 窗函数 蛇形运行 列车失稳 

分 类 号：TM935.21[电气工程—电力电子与电力传动] U229[交通运输工程—道路与铁道工程]