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Importance of the fourth and fifth intrinsic mode functions for bearing fault diagnosis

机译:第四和第五固有模式函数在轴承故障诊断中的重要性

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In the most of industrial and domestic applications bearings present important assets. The diagnostic of these elements needs accurate and reliable acquisition of its dynamic vibration signals affected by noise and other part of system such as gears, bars… Empirical Mode Decomposition (EMD) is a new signal processing method used to decompose non-stationary and non-linear vibration bearing signals into several stationary empirical mode components called Intrinsic Mode Functions (IMF). For each IMF, the energy entropy mean is computed. This technique is compared to the most used statistical features (RMS, Kurtosis) using a characterization degree. Experimental results show that time domain feature extraction is effective for bearing fault feature extraction as type (inner race, outer race, rolling element) and severity (normal, degraded, faulting). The choice of the most significant IMFs is also discussed in this paper.
机译:在大多数工业和家庭应用中,轴承都是重要资产。对这些元素的诊断需要准确,可靠地获取受噪声和系统其他部分(例如齿轮,杆)影响的动态振动信号。经验模态分解(EMD)是一种用于分解非平稳和非平稳信号的新信号处理方法。线性振动轴承将信号转换成几个称为固有模式函数(IMF)的固定经验模式分量。对于每个IMF,计算能量熵均值。使用表征度将该技术与最常用的统计特征(RMS,峰度)进行比较。实验结果表明,时域特征提取对于类型(内圈,外圈,滚动体)和严重性(正常,退化,断层)的轴承故障特征提取是有效的。本文还将讨论最重要的IMF的选择。

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