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Unformatted text preview: 2. How about for a proportional controller K < 0? 3. Will the closed-loop be stable for K s that are large in magnitude? Problem 6 Consider the unity negative feedback conFguration with P ( s ) = 5 s ( s + 5) and C ( s ) given by a PI controller. 1. Draw the root locus diagram and calculate centroids, collision locations, etc. for the cases where the zero of the PI controller is at-. 5,-3,-5 and-7. 2. Compute the zero location for the PI controller for which the root locus plot transitions from no collisions on the real axis to two collisions on the real axis. or this critical value of the zero, at what angles do the branches collide and at what angles do they depart from the collision? Draw the root locus diagram for this value of the zero....
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- Spring '10