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

Table 1

Comparison sheet of the common and the improved grey prediction model.

Tool K10
(rpm)	Test	GM(1,1)	Error	GM(1,1) + MSE	Error
2000	0.235	0.2577	−0.0227	0.235	0
2500	0.292	0.2883	0.0037	0.2775	−0.0145
3000	0.317	0.3225	−0.0055	0.3159	−0.0011
3500	0.364	0.3608	0.0032	0.3608	−0.0032
4000	0.374	0.4036	−0.0296	0.3933	0.0193
4500	0.518	0.4514	0.0666	0.4768	−0.0412
5000	0.536	0.505	0.031	0.5393	0.0033
MAPE			0.0012		0.0005
RMSE			0.0313		0.0181