Robust Locally Weighted Regression for Profile Measurement of Magnesium Alloy Tube in Hot Bending Process

Table 1

Elliptical parameters obtained by profile fitting.

Elliptical parameters	Original data	After removing outliers	The CMM data
Center coordinates	(−2.0536, 52.1455)	(−2.1344, 48.5674)	—
Major axis (mm)	11.7197	15.8586	15.683
Minor axis mm)	4.4145	11.7173	11.378
Eccentricity	0.9263	0.6739	0.688
Ellipticity	0.6233	0.2611	0.283