December 2002
Intermediate to advanced
800 pages
18h 7m
English
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M6.5. IMC-Based PID Control
Recall from Chapter 9 that Padé approximations for dead time could be used to develop a IMC-based PI and PID controllers for first-order + time-delay systems. Here, we compare the gain and phase margins for an IMC-based PI controller (using the “improved” settings) for various values of λ.
The improved IMC-based PI settings are as follows:
Problem 4. For the IMC-based PI (improved) settings, find the value of λ that leads to a gain margin of 2.5. Also, find the value of λ that leads to a phase margin of 75°. Compare the time-domain closed-loop responses for these two systems (always include plots of the manipulated ...
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