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

Table 3

Comparison sheet of the common and improved grey prediction model.

Tool K10+TiCN
(rpm)	Test	GM(1,1)	Error	GM(1,1) + MSE	Error
2000	0.112	0.3929	−0.2809	0.112	0
2500	0.136	0.0947	0.0413	0.2306	0.0946
3000	0.174	0.1299	0.0441	0.1631	−0.0109
3500	0.251	0.1782	0.0728	0.2277	−0.0233
4000	0.331	0.3352	−0.0042	0.4044	0.0734
4500	0.378	0.4597	−0.0817	0.4162	0.0382
5000	0.454	0.6305	−0.1765	0.609	0.155
MAPE			0.06534		0.02214
RMSE			0.134		0.07605