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

Table 13

Process information for fractional-order model identification of process P_1,5.

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 = 1
t5 = 0.3310 s	t10 = 0.4890 s	t15 = 0.6410 s	t20 = 0.7940 s	t25 = 0.9540 s	t30 = 1.1250 s
t50 = 1.9900
t95 = 19.123 s	t90 = 9.7230 s	t85 = 6.7390 s	t80 = 5.2090 s	t75 = 4.2430 s	t70 = 3.5600 s