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Automatic Control Systems

Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Bode plot
Nichols chart
Root locus
Nyquist plot

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

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

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Automatic Control Systems
For type 1 system the velocity lag error is

Directly proportional to gain constant
Inversely proportional to gain constant
Independent of gain constant
Inversely proportional to bandwidth of system

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Automatic Control Systems
In force current analogy, displacement x is analogous to

Electrostatic energy
Voltage
Magnetic flux linkage
Charge

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Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

True
False

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

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

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