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

Table 20

Process information for fractional-order model identification of process P₂.

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%
Δu = 1
Δy = 2
t5 = 1.7910 s	t10 = 2.3450 s	t15 = 2.8000 s	t20 = 3.2180 s	t25 = 3.6240 s	t30 = 4.0320 s
t50 = 5.9370 s
t95 = 34.790 s	t90 = 19.200 s	t85 = 14.170 s	t80 = 11.580 s	t75 = 9.9300 s	t70 = 8.7400 s