脉冲噪声环境中基于FLOWVD的机械设备故障时频监测方法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (10) : 136-140.

论文

脉冲噪声环境中基于FLOWVD的机械设备故障时频监测方法

陈志新 1

作者信息 +

A Method of Time-Frequency Monitoring on machinery in Impulsive Noise Environment Based on Fractional Lower Order Wigner-Wille Distribution

CHEN Zhi-xin1

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文章历史 +

摘要

研究了一种在稳定分布下应用的改进的Wigner-Ville分布(WVD)——分数低阶Wigner-Ville分布(FLOWVD)，并提出一种在脉冲噪声环境中基于FLOWVD的机械设备故障时频监测方法。仿真信号和实际信号的研究表明：FLOWVD是一种比WVD抗噪能力更强、更具有实际应用价值、应用更加广泛的时频分析工具。同时指出：机械设备运行现场的振动信号的统计分布特性有些服从分数低阶稳定分布。

Abstract

The improved Wigner-Ville distribution (WVD) used under stable distribution --the Fractional Lower Order Wigner-Ville distribution (FLOWVD) has been studied, and it is proposed a method of time-frequency monitoring on machinery in impulsive noise environment based on FLOWVD. By artificial signal and actual signal, the results show that: FLOWVD has a more noise immunity、higher value for using、more extensive application than WVD， and so it is a powerful tool to analyze time-frequency characteristic. The research shows that some of characteristic of statistical distribution of the vibration signal of the mechanical equipment running in the scene obeys Fractional Lower Order stable distribution, too.

导出引用

陈志新 . 脉冲噪声环境中基于FLOWVD的机械设备故障时频监测方法[J]. 振动与冲击, 2013, 32(10): 136-140

CHEN Zhi-xin . A Method of Time-Frequency Monitoring on machinery in Impulsive Noise Environment Based on Fractional Lower Order Wigner-Wille Distribution[J]. Journal of Vibration and Shock, 2013, 32(10): 136-140