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Automatic Control Systems

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

Nichols chart
Bode plot
Nyquist plot
Root locus

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

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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 and 2
3 and 4
1, 2 and 3
All

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

Magnetic flux linkage
Charge
Voltage
Electrostatic energy

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Automatic Control Systems
Robotic manipulator arms mostly use

Hydraulic actuator
None of these
Electric motor actuator
Pneumatic actuator

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

1
More than 1
Zero
less than 1

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