Research on Optimization of Structural Parameters of Equipment Cabin Bottom Cover

Table 6

Goodness of fit under different fitting algorithms.

Fitting model	Goodness of fit
	NRMS	R ^2
Second-order RSM model	0.033	0.982
Third-order RSM model	0.032	0.984
Fourth-order RSM model	0.032	0.984
RBFNN model	0.028	0.988
Kriging model	0.080	0.900
Chebyshev polynomial model	0.032	0.984