Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

In Bode diagrams an octave is a frequency band from
A:
Ο‰1 to 10 Ο‰1
B:
Ο‰1 to 8 Ο‰1
C:
Ο‰1 to 4 Ο‰1
D:
Ο‰1 to 2 Ο‰1
Answer: D

An octave is a frequency band from Ο‰1 to 2Ο‰1

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In the given figure, P = 3 kg force. Then X(s) =
A:
B:
C:
D:
Answer: C

If P = 3, . Hence .

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Modelling error may occur due to
A:
neglecting the nonlinear characteristics of plant
B:
inaccuracy of parameters
C:
change of plant characteristics with time
D:
any of the above
Answer: D

Any of these may cause modelling error.

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For the second order system damping ratio is
A:
0.1
B:
0.25
C:
0.333
D:
0.5
Answer: D

The standard form is s2 + 2ΞΆΟ‰ns + Ο‰2n = 0.

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In the given figure the input frequency f = 10(1/2 p RC)
A:
0 dB
B:
3 dB
C:
-3 dB
D:
-20 dB
Answer: D

XC = 0.1R. Hence V0 = 0.1 Vi or = 0.1 or - 20 dB.

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