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ESE : Control Systems Champion Quiz 2

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Question 1

Which one of the following is the steady state error of a control system with step error, ramp error and parabolic error constants

and

respectively for the input

Question 2

What are the order and type of close-loop system of the given transfer function and with unity feedback?

Question 3

The open loop transfer function of a unity feedback control system is given by

If gain k is increased to infinity, then damping ratio will tend to become

Question 4

Consider the following statements in connection with the differential equation given above:
1) The natural frequency of the response is 6 rad/s
2) The response is always oscillatory
3) The percentage overshoot is 10% and damping ratio of the system is 0.6
4) Natural Frequency w_n = 3 rad/s

Question 5

Match List-I with List-II and select the correct answer using the code given below the lists:
List-I
A) Imaginary axis of s-plane
B) Oscillatory time domain response
C) Overdamped time response
D) Poles at origin of s-plane
List-II
1) Imaginary axis poles in s-plane
2) Type of the system
3) Unit circle of z-plane
4) Poles on real axis of s-plane

Question 6

In an RLC series circuit, if the resistance R and the inductance L are kept constant but capacitance C is decreased, then which
one of the following statements is/are correct?
1) Time constant of the circuit is changed.
2) Damping ratio decreases.
3) Natural frequency increases.
4) Maximum overshoot is unaffected.

Question 7

Consider the network function:

What is the steady-state value due to a unit step input?

Question 8

A particular control system yielded a steady-state error of 0.20 for unit step input. A unit integrator is cascaded to this system and unit ramp input is applied to this modified system.
What is the value of steady-state error for this modified system?

Question 9

Which one of the following statements is correct for gain margin and phase margin of two closed-loop systems having loop functions G(s)H(s) and exp (–s) G(s) H(s)?

Question 10

Consider the following statements:
The frequency response of a control system has very sharp cut off characteristics. This implies that:
1) it has large peak resonance
2) it has large bandwidth
3) it is less stable system
Which of the statements given above is/are correct?

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ESE & GATE EC Control Systems

Mar 31ESE & GATE EC