Study on Application of Grey Prediction Model in Superalloy MAR-247 Machining

Table 4

Comparison sheet of the common and improved grey prediction model.

Tool/K10
(rpm)	Test	GM(1,1)	Error	GM + MSE	Error
2000	0.13	0.127	0.0029	0.13	0
2500	0.13	0.132	−0.0018	0.1326	0.0026
3000	0.14	0.137	0.0034	0.1382	−0.002
3500	0.14	0.142	−0.002	0.1416	0.0016
4000	0.17	0.147	0.0232	0.1569	−0.013
4500	0.19	0.152	0.0378	0.1759	−0.014
5000	0.21	0.158	0.0522	0.1974	−0.013
MAPE			0.0079		0.002
RMSE			0.026		0.008