AUTOMATIC CONTROL SYSTEMS QUIZ

Bandwidth is proportional to speed of response.

False

True

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Nichols chart consists of

None of these

Constant phase angle loci

Constant magnitude loci

Magnitude and phase angle loci in log-magnitude versus phase diagram

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A system is highly oscillatory if

Gain margin is high and phase margin is 180°

Gain margin is high

Gain margin is close to 1 or phase margin is zero

Gain margin is close to 1

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

Nyquist plot

Root locus

Nichols chart

Bode plot

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In force current analogue, mechanical mobility is analogous to

Admittance Y

Conductance G

Reactance X

Impedance Z

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Nichol’s chart is symmetric about – 180° axis.

True

False

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The permanent magnet field system of brushless dc servo- motor is generally on

Stator

Rotor

Partly on stator and partly on rotor

Either (a) or (b)

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Which of the following is used to obtain output position in a position control system?

Load cell

Strain gauge

Synchro

Thermistor

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

None of these

Towards right or left depending on the position of new pole

To the left and making the system more stable

To the right

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In a simple on-off controller with differential gap, the magnitude of differential gap determines

The life of controller

Both (a) and (b)

Neither (a) nor (b)

The level of accuracy

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