User`s guide

Controller Design Using the Root Locus Design GUI
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Try placing a pair of complex poles just above the right-most real closed-loop
pole. The resulting root locus plot looks like this.
Similarly, to add a pair of complex zeros to the compensator:
1 Select the add zero button from the root locus toolbar (third button from the
left).
2 Clickonthe plot regionwhereyou wouldlike toaddone of the complex zeros.
Add compensator poles here.