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Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the final value?
3/5
1
0
1/4
3/5
1
0
1/4
Answer
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Control Systems
The transfer function of a system is given as below, if a = 0.1, then the steady state error to unity ramp input will be
0.25.
0.49.
0.16.
0.35.
0.25.
0.49.
0.16.
0.35.
Answer
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Control Systems
At which frequency does the Bode magnitude plots for the functions K/S2 have gain crossover frequency
ω = K rad/sec.
ω = √K rad/sec.
ω = 0 rad/sec.
ω = K2 rad/sec.
ω = K rad/sec.
ω = √K rad/sec.
ω = 0 rad/sec.
ω = K2 rad/sec.
Answer
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Control Systems
A property of phase lead compensation is that the
gain margin is reduced.
overshoot is increased.
bandwidth of closed loop system is reduced.
rise time of closed loop system is reduced.
gain margin is reduced.
overshoot is increased.
bandwidth of closed loop system is reduced.
rise time of closed loop system is reduced.
Answer
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Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?
2.
0.
1.
3.
2.
0.
1.
3.
Answer
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Control Systems
A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is
180°
90°
-90°
-180°
180°
90°
-90°
-180°
Answer
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