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Automatic Control Systems

Automatic Control Systems
The sensor generally used in incremental optical encoder is

LED
Photodiode
LCD
Either (a) or (b)

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

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

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

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

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Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

False
True

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

Electrostatic energy
Magnetic flux linkage
Voltage
Charge

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

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

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