Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

For a first order system having transfer function , the unit impulse response is
A:
e-t/T
B:
T e-t/T
C:
D:
T2 e-t/T
Answer: C

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Assertion (A): Potentiometers can not be used as error detectors in position control systems.

Reason (R): The resolution of a potentiometer places an upper limit on its accuracy

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: D

Potentiometers are used as error detectors.

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For the system of the given figure, the damping ratio of closed loop poles is
A:
1.5
B:
1
C:
0.5
D:
0.25
Answer: C

The standard form of characteristic equation is .

Therefore .

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If a system is to follow arbitrary inputs accurately the bandwidth should be
A:
large
B:
small
C:
very small
D:
neither small nor large
Answer: A

Arbitrary inputs require large bandwidth.

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In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is
A:
B:
C:
D:
Answer: A

The zero at - 1 gives the term (s + 1) in the numerator.

The poles at (- 2 + j1) and (- 2 - j1) give (s2 + 4s + 5) term is the denominator. Gain is 2.

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