Optimal Design of a Dragonfly-Inspired Compliant Joint for Camera Positioning System of Nanoindentation Tester Based on a Hybrid Integration of Jaya-ANFIS

Table 4

Comparison of RMSE for various membership functions for the joint.

Membership functions	RMSE
	Training data	Testing data
Triangular MFs (trimf)	0.030347	0.030347
Trapezoidal MFs (trapmf)	0.030242	0.030242
Generalized bell MFs (gbellmf)	0.035087	0.035087
Gaussian MFs (gaussmf)	0.031246	0.031246
Gaussian combination MFs (gauss2mf)	0.030244	0.030244
-shaped MFs (pimf)	0.029883	0.029883
Difference between two sigmoidal MFs (dsigmf)	0.03039	0.03039
Product of two sigmoidal MFs (psigmf)	0.03039	0.03039