Table 4. Range values of membership functions for Example 1.

Step response parameters	Function ranges
	µ	ν
Settling time	[9;11] (Z-type)	[10.1;12.1] (S-type)
Peak	[0;1;1.016;1.026] (Trapezoid)	[1.022;1.032] (S-type)
Steady-state error	[0.020;0.040] (Z-type)	[0.032;0.052] (S-type)
Undershoot	[0;150;200;210] (Trapezoid)	[206;216] (S-type)