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

Table 2

Comparison sheet of the common and improved grey prediction model.

Tool K10+TiN
(rpm)	Test	GM(1,1)	Error	GM(1,1) + MSE	Error
2000	0.171	0.2364	−0.0654	0.171	0
2500	0.264	0.2582	0.0058	0.2248	−0.0392
3000	0.272	0.282	−0.01	0.264	−0.008
3500	0.313	0.308	0.005	0.307	−0.006
4000	0.415	0.3364	0.0786	0.3797	−0.0353
4500	0.455	0.3674	0.0876	0.4449	−0.0101
5000	0.506	0.4013	0.1047	0.509	0.003
MAPE			0.00561		0.00043
RMSE			0.06464		0.02068