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

Table 1

Ten statistical parameters.

Domain	Index	Formula
Time	Crest factor, Tcf
	Shape factor, Tsf
	Kurtosis, Tku
	Skewness, Tsk
	Kurtosis factor, Tkf
Frequency	Stabilization ratio, Fsr
	Wave-height ratio, Fwr
	Frequency high-low ratio, Ffr
	Average frequency, Faf
	Modified equivalent bandwidth, Fmeb