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Industrial Control Student Guide Version 1.1 phần 7 pps
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Mô tả chi tiết
Experiment #6: Proportional – Integral – Derivative Control
Page 168 • Industrial Control Version 1.1
Figure 6.9a: Response with Gain = 2, 50% Band
With a gain of 2, note that the response time is slightly faster though there is greater hunting.
Experiment #6: Proportional – Integral – Derivative Control
Industrial Control Version 1.1 • Page 169
Figure 6.9b: Data File Plotted in Excel
Drive with Kp=2
-150
-100
-50
0
50
100
150
200
0.44
21.1
41.7
62.4
83.1
104
124
145
166
186
207
228
248
269
290
310
331
352
Seconds
%Drive
%Err
%P
%Drive
From Figure 6.9b note that at this gain setting the amount of proportional drive (%P) is twice as much as the
error (%Err).
Verify the drive amounts shown in the message window of Figure 6.7a at 96.7F:
Error = __________
%Error = __________
%DrivePROP = __________
%DriveTOTAL = __________
PID Control: 20% Proportional Band, Proportional Gain = 5
Too much gain can be unsuitable for control. Repeat the experiment for a proportional band of 20% at a gain
setting of 5. Kp = 50 in the control settings. Figure 6.10 is our SPL result.