Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

The poles with greater displacement from the real axis correspond to
A:
higher frequencies of oscillations
B:
stable response
C:
lower frequencies of oscillations
D:
unbounded output
Answer: A
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Assertion (A): If f(t) = 1 - e-t,

Reason (R):

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
R is correct but A is wrong
Answer: B
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Consider the following statements about root locus
  1. The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
  2. Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
  3. The number of root locus branches terminating on infinity is always zero
Which of the above statements are correct?
A:
1, 2 and 3
B:
1 and 2 only
C:
1 only
D:
2 and 3 only
Answer: B
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Which dc servomotor requires strongest permanent magnet?
A:
Slotted armature
B:
Surface wound armature
C:
Surface wound with stationary rotor
D:
Either (a) or (b)
Answer: C
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In an armature controlled dc motor let J be equivalent moment of inertia of motor and load, f0 be equivalent viscous friction coefficient of motor and load and θ be angular displacement of motor shaft. Then torque equation is
A:
B:
C:
D:
Answer: A
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