Wear Calculation-Based Degradation Analysis and Modeling for Remaining Useful Life Prediction of Ball Screw

Table 3

Determination coefficients between linear model and degradation path.

	Working condition 1			Working condition 5			Working condition 9
	Acc 1	Acc 2	Acc 3	Acc 1	Acc 2	Acc 3	Acc 1	Acc 2	Acc 3
Cross-validation 1	0.4992	0. 5355	0. 5478	0. 4881	0. 5657	0. 5671	0. 6976	0. 7106	0. 7645
Cross-validation 2	0.4848	0. 5041	0. 5166	0. 4783	0. 5751	0. 5781	0. 7211	0. 7262	0. 7635
Cross-validation 3	0.4929	0. 5213	0. 5336	0. 4839	0. 5713	0. 5733	0. 7167	0. 7290	0. 7659
Average	0. 4923	0. 5203	0. 5327	0. 4835	0. 5707	0. 5728	0. 7118	0. 7219	0. 7647