Control Systems - Study Mode
[#201] The phase margin of a system with the open-loop transfer function $$Gleft( s
ight)Hleft( s
ight) = frac{{left( {1 - s}
ight)}}{{left( {1 + s}
ight)left( {2 + s}
ight)}}$$
Correct Answer
(D) $$infty $$
[#202] The signal flow graph of a closed-loop system is shown in the figure, where TD represents the disturbance in the forward path: The effect of the disturbance can be reduced by:
Correct Answer
(C) Increasing G 1 (s)
[#203] A unity feedback system has a forward path transfer function equal to $$frac{{42.25}}{{sleft( {s + 6.5}
ight)}}.$$ xa0 The unit step response of this system starting from rest, will have its maximum value at time equal to:
Correct Answer
(B) 0.56 sec
[#204] A second-order system has a transfer function given by $$Gleft( s
ight) = frac{{25}}{{{s^2} + 8s + 25}}.$$ xa0 xa0If the system, initially at rest, is subjected to a unit step input at t = 0. the second peak in the response will occur at
Correct Answer
(A) $$pi { ext{ sec}}$$
[#205] Given the state variable model {A, B, C} of a single-input, single-output system, the asymptotic stability is determined from:
Correct Answer
(C) All A