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Automatic Control Systems

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

less than 1
more than 1
zero
1

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Automatic Control Systems
DC tachogenerator can be used in

Both A and B
Speed control system
Neither A nor B
Position control system

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Automatic Control Systems
In force current analogue, mechanical mobility is analogous to

Reactance X
Impedance Z
Admittance Y
Conductance G

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Automatic Control Systems
The addition of a pole to the open loop transfer function pulls the root locus

To the right
To the left and making the system more stable
Towards right or left depending on the position of new pole
None of these

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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

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

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Automatic Control Systems
The relative stability of a system is given by

Either (a) or (b)
Both phase and gain margins
Phase margin alone
Gain margin alone

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