New Tool Wear Estimation Method of the Milling Process Based on Multisensor Blind Source Separation

Table 3

Estimation error of three methods with testing set C1.

	LS-SVM	PCA + LS-SVM	SSA + LS-SVM
RMSE	52.1077	22.5284	8.4653
R	0.2899	0.6961	0.9848