A Novel Method for Remaining Useful Life Prediction of Roller Bearings Involving the Discrepancy and Similarity of Degradation Trajectories

Table 6

The RUL prediction results of the testing bearings.

	Testing bearings
	B 1_3	B 1_4	B 1_5	B 1_6	B 1_7	B 2_3	B 2_4	B 2_5	B 2_6	B 2_7	B 3_3
Optimal order	2	2	8	7	7	5	5	7	6	4	8
Current sample point	1,802	1,139	2,302	2,302	1,502	1,202	612	2,002	572	172	352
Predicted life (10 s)	2,440	1,391	2,836	2,740	2,410	1,940	759	2,314	726	219	430
Predicted RUL (10 s)	638	252	534	438	908	738	147	312	156	47	78
Actual RUL (10 s)	573	339	161	146	757	753	139	309	129	58	82
Error rate (%)	–11.34	12.80	–231.6	–200	–19.95	1.992	–5.755	–0.971	–19.38	18.99	4.878