A Fault Diagnosis Method for Rotating Machinery Based on PCA and Morlet Kernel SVM

Table 2

The states recognition rate of three different methods (recognition rate 𝜂%).

States recognition methods	Normal state	0.18 mm fault depth	0.36 mm fault depth	0.53 mm fault depth	0.71 mm fault depth
Without PCA dimension reduction	91	61	76	83	81
Use the LTSA method dimension reduction	90	83	90	84	88
Use the LPP method dimension reduction	96	92	98	98	100
Use the PCA method dimension reduction	100	100	100	100	100