Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

In Bode diagram (log magnitude plot) of the factor 1/(1 + jωT) in the transfer function the log magnitude for ω << 1/T can be approximated by
A:
0 dB
B:
20 log ωT dB
C:
-20 log ωT dB
D:
none of the above
Answer: A
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A lead compensator is basically a
A:
high pass filter
B:
low pass filter
C:
band stop filter
D:
none of the above
Answer: A

See transfer function in the equation .

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In the given figure the input frequency f = 0.1 (1/2 p RC)
A:
0 dB
B:
3 dB
C:
-3 dB
D:
20 dB
Answer: A

XC = 10R. Hence V0 ⋍ Vi .

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The transfer function of transportation lag is
A:
G(jω) = ejωT
B:
G(jω) = e-jωT
C:
G(jω) = (1 + jωT)
D:
G(jω) = (1 - jωT)
Answer: B
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A synchro transmitter receiver unit is a
A:
two phase ac device
B:
3 phase ac device
C:
dc device
D:
1 phase ac device
Answer: D
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