Remaining Useful Life Estimation of Fan Slewing Bearings in Nonlinear Wiener Process with Random Covariate Effect

Table 4

AIC comparison between M1 model, M2 model, and M3 model.

Measurement time (×10^3 min)	Model	log-LF	AIC
0.3	M1	−109.8223	231.6446
	M2	−131.4121	268.8242
	M3	−117.8287	246.8738
2	M1	−537.4369	1086.8738
	M2	−599.2191	1204.4382
	M3	−551.4359	1114.8718
4	M1	−881.8127	1775.6254
	M2	−985.0085	1976.0170
	M3	−912.2839	1836.5678