支持向量机
熵(时间箭头)
人工智能
断层(地质)
模糊逻辑
模式识别(心理学)
方位(导航)
作者
Xiaolong Zhu,Jinde Zheng,Haiyang Pan,Jiahan Bao,Yifang Zhang
出处
期刊:Entropy
[MDPI AG]
日期:2018-08-13
卷期号:20 (8): 602-
被引量:16
摘要
Multiscale entropy (MSE), as a complexity measurement method of time series, has been widely used to extract the fault information hidden in machinery vibration signals. However, the insufficient coarse graining in MSE will result in fault pattern information missing and the sample entropy used in MSE at larger factors will fluctuate heavily. Combining fractal theory and fuzzy entropy, the time shift multiscale fuzzy entropy (TSMFE) is put forward and applied to the complexity analysis of time series for enhancing the performance of MSE. Then TSMFE is used to extract the nonlinear fault features from vibration signals of rolling bearing. By combining TSMFE with the Laplacian support vector machine (LapSVM), which only needs very few marked samples for classification training, a new intelligent fault diagnosis method for rolling bearing is proposed. Also the proposed method is applied to the experiment data analysis of rolling bearing by comparing with the existing methods and the analysis results show that the proposed fault diagnosis method can effectively identify different states of rolling bearing and get the highest recognition rate among the existing methods.
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