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ESE-2018 Electrical Engineering Quiz 12

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Question 1

A system with gain margin close to unity or phase margin close to zero is

Question 2

The transfer function of phase-lead compensator is given by, where . What is the maximum phase shift provided by this compensator.

Question 3

What is the unit impulse response of the system shown in figure for t ≥ 0?

Question 4

A control system whose step response is is cascaded to another control block whose impulse response is . What is the transfer function of the cascaded combination?

Question 5

System is said to be marginally stable, if

Question 6

For the Niquous plot shown, the system is

Question 7

In the Bode plot of a unity feedback control system, the value of phase angle of at the gain cross over frequency of the Bode plot, the phase margin of the system is

Question 8

Consider the following statements with reference for relative stability of a system
1) Phase margin is related to effective damping
2) Gain margin givens better estimate of damping ratio than phase margin
3) When expressed in dB. Gain margin is negative for a stable system.
Which of the statements given above are correct?
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Feb 12ESE & GATE EE