Hybrid Integration of Taguchi Parametric Design, Grey Relational Analysis, and Principal Component Analysis Optimization for Plastic Gear Production

Table 4

Average shrinkage and S/N ratios for each trial.

Trials	Average shrinkage			S/N ratio
	Tooth thickness (mm)	Addendum circle (mm)	Dedendum circle (mm)	Tooth thickness (dB)	Addendum circle (dB)	Dedendum circle (dB)
1	−0.0285	−0.0211	−0.0197	29.1568	33.5159	34.0801
2	−0.0542	−0.0213	−0.0198	25.0132	33.4284	34.0464
3	−0.0718	−0.0202	−0.0188	22.2234	33.8712	34.4891
4	−0.1067	−0.0200	−0.0196	19.2536	33.9651	34.1543
5	−0.1045	−0.0215	−0.0205	19.1704	33.3515	33.7506
6	−0.1174	−0.0211	−0.0192	18.4870	33.5269	34.3038
7	−0.0942	−0.0202	−0.0186	20.4134	33.8720	34.6027
8	−0.1298	−0.0185	−0.0174	17.6876	34.6592	35.1961
9	−0.0998	−0.0197	−0.0169	19.9179	34.0946	35.4325