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Automatic Control Systems

Automatic Control Systems
If the poles lie in second quadrant, damping ratio is

less than 1
1
more than 1
zero

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Higher frequencies of oscillations
Stable response
Lower frequencies of oscillations
Unbounded output

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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
lie on the real axis
None of these
Always occur in complex conjugate pairs

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Automatic Control Systems
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

None of these
The gain is decreased below lower critical value
The gain is increased beyond upper critical value
Both A and B

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Automatic Control Systems
Transport lag usually exists in

Thermal systems
Thermal, hydraulic and pneumatic systems
Hydraulic systems and thermal systems
Pneumatic systems

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

Neither (a) nor (b)
A family of circles
A family of straight lines
Either (a) or (b)

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