A Comparative Study of Four Nonlinear Dynamic Characteristics in Feature Extraction of Bearing Fault Diagnosis

Table 1

Mean value and standard deviation of the nonlinear dynamic characteristics for four bearing signals.

Characteristic	Parameter	Fault type
		N-100	B-121	IR-108	OR-133
LZC	Mean value	0.6904	0.6942	0.8731	0.7293
	Standard deviation	0.0230	0.0285	0.0204	0.0185
DE	Mean value	0.7989	0.9184	0.9252	0.7752
	Standard deviation	0.0054	0.0048	0.0041	0.0067
FD	Mean value	1.3762	1.4720	1.4211	1.4047
	Standard deviation	0.0052	0.0070	0.0027	0.0037
LE	Mean value	0.3915	0.3021	0.2346	0.1405
	Standard deviation	0.0700	0.0598	0.0536	0.0447