Efficient Method of Firing Angle Calculation for Multiple Launch Rocket System Based on Polynomial Response Surface and Kriging Metamodels

Table 7

Effect of the correlation function of Kriging on prediction accuracy of maximum range angle.

Correlation function	Maximum range angle			Maximum range
	MAE (mil)	MRE (%)	RMSE (mil)	MAE (m)	MRE (%)	RMSE (m)
Cubic	0.318	0.032	0.062	93.58	0.037	15.53
Exp	0.720	0.074	0.121	213.22	0.088	30.26
Gauss	0.385	0.036	0.073	95.81	0.039	18.29
Linear	0.753	0.079	0.122	223.23	0.090	30.40
Matern32	0.613	0.064	0.099	182.36	0.075	24.29
Matern52	0.427	0.040	0.076	103.39	0.043	18.87
Spherical	0.686	0.072	0.121	207.54	0.084	29.95
Spline	0.309	0.029	0.060	58.02	0.025	14.71