Rolling Bearing Fault Diagnosis Based on ELCD Permutation Entropy and RVM

Table 2

Permutation entropy of the first two ISCs of the three signals.

Principal ISC	Normal state	Rolling element fault	Outer ring fault	Inner ring fault
ISC1	0.8724	1.0125	1.2734	1.6346
ISC2	0.4356	0.6025	1.1804	1.3152