CONTROL SYSTEMS QUIZ

Advantages of open loop control system is/are

All of these

accurate.

reliable.

simple and economical.

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Name test signals used in time response analysis?

Impulse.

Unit step.

Unit ramp.

All of B, C, D.

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The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

8

6

2

4

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A unity feedback control system has an open loop transfer function G(s) = k/(s(s² + 7s + 12) The gain k for which s = -1 + j1 will lie on the root locus of the system is

6.5

10

4

5

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Slope of asymptote in Bode plot of 2nd order system is _____________________ per octave.

3 dB

6 dB

18 dB

12 dB

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The transfer function of a system is 10/(1 + S) when operated as a unity feedback system, the steady state error to a unit step input will be

1/11.

¾.

Zero.

10.

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Which of the following is/are the characteristics of negative feedback control system?

Low sensitivity to parameter variations

All of these

Reduction in gain at the expense of better stability

Rejection of disturbance signals

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If two blocks having gains A and B respectively are in series connection, find the resultant gain using block diagram reduction technique?

A+B

A/B

A*B

A-B

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A second order control system has F(jω) = 100/(100 - ω² + 10√2 jω). Find the resonant peak?

1.5

0.707

0.5

1

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

4 rad/s

1/2 rad/s

1/4 rad/s

2 rad/s

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