• CN:11-2187/TH
  • ISSN:0577-6686

›› 2003, Vol. 39 ›› Issue (7): 150-153.

• 论文 • 上一篇    下一篇

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基于一种新的时频分布的机械故障诊断

王新晴;马瑞恒;王耀华;严骏;蔡立艮;曾拥华;王洋   

  1. 解放军理工大学工程兵工程学院
  • 发布日期:2003-07-15

MECHANICAL FAULT DIAGNOSIS BASED ON A NEW TIME-FREQUENCY DISTRIBUTION

Wang Xinqing;Ma Ruiheng;Wang Yaohua;Yan Jun;Cai Ligen;Zeng Yonghua;Wang Yang   

  1. PLA University of Science & Technology
  • Published:2003-07-15

摘要: 在巧妙构思核函数的基础上,给出了一种新的时频分布(TFD)及其离散算法,并将该TFD应用于机械故障诊断。结合两个诊断实例,同时与Winger-Ville 分布 (WVD)进行对比,发现该分布具有良好的时频聚集性,并且能够有效的抑制交叉项。事实证明,该分布能够刻画出传统Fourier变换和WVD所不能反映的故障特征信号,能够较好的进行故障诊断。

关键词: WVD, 故障诊断, 核函数, 时频分布

Abstract: A new time-frequency distribution (TFD) is proposed by designing a new kernel function , which is applied to mechanical fault diagnosis. Through diagnosing two faults and comparing with Winger-Ville distribution(WVD), the new distribution is found to have a high resolution and can suppress cross terms perfectly. In practice, this new distribution can reflect the characteristics of the mechanical faults, which the WVD and FFT cannot, and so a good method for faults diagnosis is put porward.

Key words: Fault diagnosis, Kernel function, Time-frequency distribution, WVD

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