Influence of the Selection of Reaction Curve’s Representative Points on the Accuracy of the Identified Fractional-Order Model

Table 14

FFOPDT model parameters for the considered sets of representative points (5–50-95%), (10–50–90%), (15–50–85%), (20–50–80%), (25–50–75%), and (30–50–70%), respectively.

Method ^#1: 5–50–95%	Method ^#2: 10–50–90%	Method ^#3: 15–50–85%	Method ^#4: 20–50–80%	Method ^#5: 25–50–75%	Method ^#6: 30–50–70%
K1 = 1.0000	K2 = 1.0000	K3 = 1.0000	K4 = 1.0000	K5 = 1.0000	K6 = 1.0000
T1 = 2.3318 s	T2 = 2.3011 s	T3 = 2.2834 s	T4 = 2.2688 s	T5 = 2.2666 s	T6 = 2.2418 s
L1 = 0.3742 s	L2 = 0.4724 s	L3 = 0.4041 s	L4 = 0.4057 s	L5 = 0.3901 s	L6 = 0.4175 s
α1 = 0.8719	α2 = 0.8882	α3 = 0.8992	α4 = 0.9067	α5 = 0.9122	α6 = 0.9143