Optimization of Scanning Parameters in Coordinate Metrology Using Grey Relational Analysis and Fuzzy Logic

Table 9

Definition of input and output variables.

Variable		Type of membership function	Levels	Interval
Input	Scanning time; Range (90-500)	trimf	Low	< 180
		trapmf	Medium	150-250
		trapmf	High	225-350
		trimf	Very High	> 300
	RMS; Range (10-40)	trimf	Low	< 18
		trapmf	Medium	16-24
		trapmf	High	22-28
		trimf	Very High	> 26
Output	PI; Range (0-1)	trimf	Worst	< 0.20
		trapmf	Very Low	0.15-0.30
		trapmf	Low	0.27-0.40
		trapmf	High	0.38-0.48
		trapmf	Very High	0.46-0.75
		trimf	Best	> 0.70