CONTROL SYSTEMS QUIZ

The unit step error coefficient of a system with unity feedback is

1/6.

1.

0.

infinity.

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The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

0.4 sec.

1.6 sec.

1.2 sec.

2 sec.

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A transfer function is given as The steady state sinusoidal response will become zero at a frequency response of

4 rad/s

9 rad/s

3 rad/s

2 rad/s

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In frequency response analysis of second order system, the error at corner frequency is

20 log2ξ

10 logξ

-20 log2ξ

-10 logξ

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The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

0

3/5

3/9

1/4

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Which of the following is/are the example of actuator?

Electric motor

Hydraulic motor

Pneumatic motor

All

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A proportional plus derivative controller

both 1 and 2

has high sensitivity

improves the steady state accuracy

increases the stability of the system

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The impulse response of the system described by the differential equation will be

(1/3) × (1-e-3t).

e6t.

1/3.

e-3t u(t).

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Time constant is defined as the time taken by the response of the system to reach ----------- ?

70.7% of the final value

63% of the final value

100% of the final value

50% of the final value

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What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

9/4

4/9

13/4

4/13

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