Remaining Useful Life Prediction Method of Rolling Bearings Based on Pchip-EEMD-GM(1, 1) Model

Table 2

RUL prediction.

Day	Normal working stage	Early failure stage	Healing stage	Medium wear stage
Actual RUL	3.2091	2.1883	1.1181	0.1667
Hazard prediction method	6.6262	2.7499	1.2736	0.1831
Covariates; prediction method	8.1662	1.5184	0.8871	0.1259