Fault Diagnosis of a Hydraulic Pump Based on the CEEMD-STFT Time-Frequency Entropy Method and Multiclass SVM Classifier

Table 2

Feature vector set after dimension reduction.

Fault pattern	No.	Feature 1	Feature 2	Feature 3
Normal	1	4.1284	2.9741	5.6483
	2	4.1327	2.9729	5.6553
	⋯
	20	3.9954	2.9829	5.5353
Rotor wear	21	3.7289	2.0520	5.2589
	22	3.6789	2.0772	5.2629
	⋯
	40	3.5266	2.1772	5.1467
Swash plate wear	41	3.2972	2.4613	5.1078
	42	3.3079	2.4822	5.1103
	⋯
	60	3.3408	2.5041	5.1157