Online Prediction of Milling Inner Hole Roundness Error Based on Accurate SSEM Value Extraction

Table 2

Predictive performance analysis.

	SSEM value (μm)	WRE (μm)	Naive model			Composite model
			Prediction (μm)	Deviation (μm)	Difference (%)	Prediction (μm)	Deviation (μm)	Difference (%)
(a)	6.40	7.70	7.30	−0.40	−5.25	8	0.30	3.90
(b)	8.93	11.45	10.18	−1.27	−11.09	11.16	−0.29	−2.51
(c)	5.14	6.52	5.86	−0.66	−10.13	6.46	−0.09	−1.46
(d)	6.15	7.19	7.01	−0.18	−2.49	7.69	0.50	6.92
(e)	7.40	9.12	8.44	−0.68	−7.50	9.25	0.13	1.43