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"GATE EC 2022: Quiz Control System10 "
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Question 1
Consider the Nyquist plot of the second order underdamped system shown in the below figure.
The Resonant Frequency corresponding to the Nyquist plot is
Question 2
The polar plot of G(S) H(S) for K = 10 is given below
The gain ‘K’ for a 40 dB gain margin is _______
Question 3
The Routh – Hurwitz array is given for a third order characteristic equation as follows
The values of a, b, c, d are respectively, for which the system should be marginally stable
Question 4
For the system 
,
,
y = [4 0] x
With u as unit impulse and with zero initial state the output y at t = 0.1 sec is ______
Question 5
A sensitivity of transfer function T=(A1+kA2)/ (A3+kA4) with respect to parameter k is given by
Question 6
Find the values of Kp, K1 and KD for PID controller whose characteristics equation has real roots at 10, 
=0.8 and 
n=2rad/s
=0.8 and n=2rad/s - 268 attempts
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Nov 4ESE & GATE EC
