Siemens Module B3 ユーザーズマニュアル
Automation and Drives - SCE
T I A Training Document
Page 55 of 64
Module
5.2 Setting the PI-Controller according to Ziegler-Nichols
By experimenting with P-T
1
-T
L
systems, Ziegler and Nichols have found the following optimum
controller settings for fixed setpoint control:
K
S
T
u
T
g
K
PR
= 0,9
T
N
= 3,33 T
u
0.9
3.3
In general, we get disturbance characteristics with these setting values that are quite good. [7]
5.3 Setting the PID Controller according to Chien, Hrones and Reswick
For this method, the response to setpoint characteristics as well as disturbance characteristics was
examined, in order to get the most favorable controller parameters. Different values resulted for
both cases.
The following settings were the result:
• For disturbance characteristics:
K
S
T
u
T
g
K
PR
=
Preface Fundamentals Discontinuous Action Controller Controller Block (S)FB41 Setting the System Appendix
0,6
T
N
= 4 T
u
aperiodischer Einschwing-
vorgang mit kürzester Dauer
vorgang mit kürzester Dauer
K
S
T
u
T
g
K
PR
= 0,7
20% Überschwingen
r
minimale Schwingungsdaue
20% overshoot
Minimum period of oscillation
Minimum period of oscillation
Apriodical transient reaction
with the shortest period
with the shortest period
0.6
0.7
T
N
=
T
u
2,3
2.3
B3
Issued: 02/2008 Control Engineering with STEP 7