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

Table 1

Data sets of IEEE 2012 PHM prognostic challenge.

Data sets	Operating conditions
	Condition 1	Condition 2	Condition 3
Speed (RPM)	1,800	1,650	1,500
Load (N)	4,000	4,200	5,000
Training sets	Bearing 1_1	Bearing 2_1	Bearing 3_1
	Bearing 1_2	Bearing 2_2	Bearing 3_2
Testing sets	Bearing 1_3	Bearing 2_3	Bearing 3_3
	Bearing 1_4	Bearing 2_4
	Bearing 1_5	Bearing 2_5
	Bearing 1_6	Bearing 2_6
	Bearing 1_7	Bearing 2_7