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Unformatted text preview: Figure 17: RootLocus for PController (the dot at k c = -1.2 ). Next, integral act ion is introduced. In the case of the PI controller, different plots are produced for different controller parameters and are given in Figures 18 to 20. Figure 18: RootLocus for PI controller for t I = 1 (the dot at k c = -1.2 ). Figure 19: RootLocus for PI controller for t I = 0.2 (the dot at k c = -1.2 ) Figure 20: RootLocus for PI controller for t I = 1 (the dot at k c = -20 ). The fo llowing can be concluded:
· The system is always stable for any value of the controller parameters both for P and PI controllers as long as the controller gain is negat ive (reverse action)
· The addit io n o f integral act ion increases the order of the system and introduces a pole at the origin
· For Pcontroller the poles are always real while for PI contro...
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This note was uploaded on 01/12/2014 for the course CHE 4198 taught by Professor Hjortso,m during the Fall '08 term at LSU.
- Fall '08