Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 3

31.

In position control system the device used for providing rate feedback voltage is

potentiometer

synchro-transmitter

synchro-transformer

tacho generator

Answer: Option

Explanation:

Tacho generator provides a voltage whose magnitude is proportional to speed.

32.

For the system of the given figure, the closed loop poles are at

0 and -4

-2 ± j6

2 ± j6

-3 ± j8

Answer: Option

Explanation:

For the characteristic equation s² + 4s + 10 = 0, the roots are -2 ± j 6.

33.

For the given figure,

Answer: Option

Explanation:

34.

A system has

.If x(t) = t², Y(s) is

Answer: Option

Explanation:

35.

Derivative control action is effective?

Only during steady state periods

Only during transient state periods

During both steady state and transient state periods

Either during steady state or during transient state periods

Answer: Option

Explanation:

Derivative of constant is zero. Hence derivative control action is not effective is steady state.

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