Optimization for Tribological Properties of Glass Fiber-Reinforced PTFE Composites with Grey Relational Analysis

Table 7

Results of confirmation test.

	Initial parameter combination	Optimal parameter combination
	Level
	A1B1C1D1	A3B3C1D2
		Prediction	Experimentation
ratio	−6.4223	−0.756	−0.8722
Wear (µ)	226.24		40.2
COF	0.33		0.23
Grey relational grade	0.4774	0.9166	0.9045