CONTROL SYSTEMS QUIZ

Transfer function of a control system depends on

nature of output.

initial conditions of input and output.

nature of input.

system parameters alone.

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Force balancing equation for elastic element (K) is (where, x = displacement)

K *x

K d2x/dt2

None of these

K dx/dt

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Find the corner frequency for the following transfer function? G(s) = 1/(s+2)

1/4 rad/s

2 rad/s

1/2 rad/s

4 rad/s

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For the polynomial , number of roots which lie in the right half of s-plane is

3

4

2

1

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None of the poles of a linear control system lie in the right half of s plane. For a bounded input, the output of this system

tends to zero.

none of these.

could be unbounded.

always bounded.

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For a unity feedback control system open loop transfer function then velocity error constant is

0.

infinity.

10.

50.

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Time response for a second order control system depends on value of ξ. If ξ>1 then the system is called as

over damped system.

under damped system.

undamped system .

critically damped system.

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Time taken for the response to rise from zero to 100 % for very first time is called

Peak time.

Settling time.

Delay time.

Rise time.

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The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

100 sec

4 sec

10 sec

400 sec

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The unit step response of the system is 1 - e-t(1+t). Which is the system?

unstable

oscillatory

critically stable

stable

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