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Q#1
Root Locus Technique
GATE EE 2000
MSQ
+2 marks
-0 marks
A unity feedback system has open-loop transfer function
(a) Draw a rough sketch of the root locus plot; given that the complex roots of the characteristic equation move along a circle.
(b) As K increases, does the system become stable? Justify your answer.
(c) Find the value of K (if it exists) so that the damping of the complex closed loop poles is 0.3
(a)
(b) As k increases. The branches of root locus move left and hence system becomes more stable.
(c) no such value of k exists such that
None of these
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