Research on the Feature Selection of Rolling Bearings’ Degradation Features

Table 4

The summary of the selected parameter values.

Complexity	Parameters	Value
ApEn	Embedding dimension, m	2
	Tolerance r	0.2 std
	Delay time τ	1
SampEn	Embedding dimension, m	2
	Tolerance r	0.2 std
	Delay time τ	1
FuzzyEn	Embedding dimension, m	2
	Tolerance r	0.2 std
	Parameter	2
	Delay time τ	1
ShEn	Average filling of the histogram, k/N	0.02
PermEn	Embedding dimension, m	6
	Delay time τ	1
LZC	Parameter m	Median value