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Q#1 Frequency Domain Analysis GATE EE 2000 MSQ +2 marks -0 marks

Open-loop transfer function of a unity-feedback system is:

 

Given : when

(a) Determine the phase margin when  

(b) Comment in one sentence on the effect of dead time on the stability of the system

(c) Determine the maximum value of dead time  for the closed-loop system to be stable

(a) Phase margin

(b) Phase margin reduces and stability decreases

(b) Phase margin reduces and stability increases

(c)

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