改进差分滤波器在轴承故障诊断中的应用研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (13) : 81-86.

论文

王建国，范业锐，张文兴，张超

作者信息 +

Application of improved difference filter in bearing fault diagnosis

WANG Jianguo, FAN Yerui, ZHANG Wenxing, ZHANG Chao

Author information +

文章历史 +

摘要

针对形态差分滤波器（Difference filter, DIF）在信号特征提取中可能存在频率混淆的问题，提出了改进的差分滤波器（Improved Difference filter, IDIF）的信号处理方法。由差分滤波器的内部结构特点可知，传统的形态差分滤波器无法同时识别正负冲击特性，导致频率混淆难识别。本文通过对滤波器的结构进行改进，利用帽变换辨别信号的主导冲击方向，提高了滤波器识别正负冲击特征的能力。为了验证该方法的有效性，对此进行了仿真实验和实际滚动轴承的故障诊断实验。实验结果表明，改进的形态差分滤波器可以同时区分出故障特征的正负特性，较好的避免频率混淆。

Abstract

Aiming at the problem of morphological difference filters existing frequency confusing in signal feature extraction, an improved differential filter’s signal processing method was proposed. According to characteristics of a differential filter’s inner structure, it was shown that a traditional morphological difference filter can’t identify positive and negative impact characteristics simultaneously to cause frequency confusion being difficult to recognize. Here, through improving the filter structure, Hat transform was used to recognize the dominant impact direction of a signal, and improve the filter’s ability to identify positive and negative impact characteristics. In order to verify the effectiveness of the proposed method, Numerical simulation and actual rolling element bearing fault diagnosis tests were conducted. The results showed that the improved morphological difference filter can distinguish positive and negative characteristics of fault features simultaneously to better avoid frequency confusion.

导出引用

王建国，范业锐，张文兴，张超. 改进差分滤波器在轴承故障诊断中的应用研究[J]. 振动与冲击, 2019, 38(13): 81-86

WANG Jianguo, FAN Yerui, ZHANG Wenxing, ZHANG Chao. Application of improved difference filter in bearing fault diagnosis[J]. Journal of Vibration and Shock, 2019, 38(13): 81-86

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