Sketch the root locus for unity feedback system with following forward gain function: KG(S) = K(S+1)(S2+2)/S2-9 For what range of K is system stable & unstable.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.3P
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Sketch the root locus for unity feedback system with following forward gain function:

KG(S) = K(S+1)(S2+2)/S2-9

For what range of K is system stable & unstable.

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