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Automatic Control Systems
If poles lie in first quadrant, damping ratio is
More than 1
Zero
1
less than 1
More than 1
Zero
1
less than 1
Answer
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Automatic Control Systems
Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator
1, 2 and 3
3 and 4
1 and 2
All
1, 2 and 3
3 and 4
1 and 2
All
Answer
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Automatic Control Systems
In root locus analysis the breakaway and break in points
Either lie on the real axis or occur in complex conjugate pairs
Always occur in complex conjugate pairs
lie on the real axis
None of these
Either lie on the real axis or occur in complex conjugate pairs
Always occur in complex conjugate pairs
lie on the real axis
None of these
Answer
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Automatic Control Systems
A lead compensator
None of these
Increases the stability margin
Speeds up the transient response
Increases the stability margin and speeds up the transient-response.
None of these
Increases the stability margin
Speeds up the transient response
Increases the stability margin and speeds up the transient-response.
Answer
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Automatic Control Systems
For type 1 system the velocity lag error is
Inversely proportional to bandwidth of system
Inversely proportional to gain constant
Independent of gain constant
Directly proportional to gain constant
Inversely proportional to bandwidth of system
Inversely proportional to gain constant
Independent of gain constant
Directly proportional to gain constant
Answer
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Automatic Control Systems
Which of the following features is not associated with Nichols chart?
M loci are centred about (0 dB, -180°) point
It is symmetric about -180°
The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
M loci are centred about (0 dB, -180°) point
It is symmetric about -180°
The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
Answer
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