Fault Monitoring and Classification Method of Rolling Bearing Based on KICA and LSSVM

Abstract

The running process of rolling bearing is often nonlinear and abnormal. Therefore, this paper uses the method which combing KICA and LS-SVM to achieve bearings' fault monitoring and classification. Firstly, the vibration signal is mapped into the high dimensional space by using kernel methods, constructing the I2, Ie2 and SPE indicator in the high dimensional space to monitor the process data. And then when the fault occurred, extracting the time domain and wavelet energy features to construct the multi-domain mixed feature set, and input the feature vector into LS-SVM for classification. Experimental results show the method can complete the fault monitoring and classification of rolling bearing effectively.