CONTROL SYSTEMS QUIZ

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

A+B

A/B

A*B

2(A+B)

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The maximum phase lag occurs at the ------------------- of the two corner frequencies?

geometric mean

None of these

arithmetic mean

either 1 or 2

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A function of one or more variables which conveys information about the nature of physical phenomenon is called

noise.

interference.

signal.

system.

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The transfer function of phase lead compensator is given by , where, T > 0, α < 0. What is the maximum phase shift provided by this compensator?

both 1 and 3

sin-1((1 - α)/(1 + α)

tan-1((1 - α)/(2√α)

cos-1((1 - α)/(1 + α)

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In force-current analogy, electrical analogous quantity for displacement (x) is

capacitance.

flux.

inductance.

voltage.

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

2

4

3

1

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A second order system has peak over shoot = 50% and period of oscillations 0.2 seconds. Find the resonant frequency?

32.16 rad/s

31.41 rad/s

29.74 ra/s

30.63 rad/s

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Which of the following is the correct expression for the transfer function of an electrical RC phase lag compensating network?

1/(1+RCS)

RCS/(1+RCS)

C/(1+RCS)

RC/(1+RCS)

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Consider the following statements for phase lead compensation:

nether 1 nor 2

Phase lead compensation shifts the gain crossover frequency to the right

The maximum phase lag occurs at the arithmetic mean of the two corner frequencies.

both 1 and 2

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Find the angles of asymptotes of the open loop transfer function G(s) = k(s + 1)/((s(s+2)(s+4)?

0°, 180°

90°,270°

60°,240°

90°,180°

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