Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

If Nyquist plot has a encirclement of (-1 + jo) point, the system is stable if
A:
there are no poles of G(s) H(s) in right-half plane
B:
there is one pole of G(s) H(s) in right-half plane
C:
there is no zeros of G(s) H(s) in right-half plane
D:
none of the above
Answer: A
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As the bandwidth increases, the cost of components
A:
generally decreases
B:
generally increases
C:
may increase or decrease
D:
does not change
Answer: B
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DC servomotors are, generally
A:
permanent magnet dc motors
B:
shunt field motors
C:
separately excited dc motors
D:
none of the above
Answer: A
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Given figure shows the magnitude plot for a system. The steady state error for unit step input is
A:
1/101
B:
1/100
C:
1/41
D:
1/40
Answer: C
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Which of the following is not correct for two phase servomotor?
A:
Rotor diameter is small
B:
Applied voltages are seldom balanced
C:
Rotor resistance is low
D:
Torque speed curve is linear
Answer: C

In this motor ratio is small or R is high.

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