Which of the following is the input of a controller? - Automatic Control Systems

Electronics and Communication Engineering (ECE) : Automatic Control Systems - Quiz(MCQ)

Which of the following is the input of a controller?

A)

Sensed signal

B)

Error signal

C)

Desired variable value

D)

Signal of fixed amplitude not dependent on desired variable value

Correct Answer : Option (B) : Error signal

Explanation : Controller is the block in the control system that control the input and provides the output and this is the first block of the system having the input as the error signal.

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For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)

A)

is +90Â°

B)

is -90Â°

C)

depends on the damping factor

D)

None of the above

Correct Answer : is -90Â°

The response to sinusoidal excitation can be found by

A)

setting s = jÏ‰ in the network function

B)

setting s = -jÏ‰ in the network function

C)

taking inverse transform of network function

D)

None of the above

Correct Answer : setting s = jÏ‰ in the network function

The resolution of a wire wound potentiometer is about

A)

5%

B)

1%

C)

0.1%

D)

0.001%

Correct Answer : 0.1%

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