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Test: Frequency Domain Analysis of Control Systems - 1 - Electronics and Communication Engineering (ECE) MCQ


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10 Questions MCQ Test - Test: Frequency Domain Analysis of Control Systems - 1

Test: Frequency Domain Analysis of Control Systems - 1 for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Test: Frequency Domain Analysis of Control Systems - 1 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Frequency Domain Analysis of Control Systems - 1 MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Frequency Domain Analysis of Control Systems - 1 below.
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Test: Frequency Domain Analysis of Control Systems - 1 - Question 1

The Bode diagram approach is the most commonly used method for the analysis and synthesis of

Test: Frequency Domain Analysis of Control Systems - 1 - Question 2

Nichol's chart is a plot of

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Test: Frequency Domain Analysis of Control Systems - 1 - Question 3

The initial slope of Bode plot for a transfer function having no poles at origin is

Detailed Solution for Test: Frequency Domain Analysis of Control Systems - 1 - Question 3

With no-pole at origin, initial slope will be OdB/decade.
For n-pole at origin, initial slope will be -20 ndB/decade.

Test: Frequency Domain Analysis of Control Systems - 1 - Question 4

The gain margin of a control system having the loop transfer function G(s)H(s) = 

Detailed Solution for Test: Frequency Domain Analysis of Control Systems - 1 - Question 4


Test: Frequency Domain Analysis of Control Systems - 1 - Question 5

Gain crossover frequency is the frequency at which the gain of G(jω) is

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Test: Frequency Domain Analysis of Control Systems - 1 - Question 6

For a control system having gain margin of -10 dB, the magnitude of GH(s) for 180° phase shift is

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Test: Frequency Domain Analysis of Control Systems - 1 - Question 7

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

Test: Frequency Domain Analysis of Control Systems - 1 - Question 8

If the transfer function of a first-order system in  then the time constant of this system will be

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Hence, time constant = T= 5 seconds

Test: Frequency Domain Analysis of Control Systems - 1 - Question 9

The polar plot of  

Detailed Solution for Test: Frequency Domain Analysis of Control Systems - 1 - Question 9


Given system is of type-1 and order-2, therefore its polar plot will be as shown below.

Hence, the polar plot will neither cross the real axis nor the imaginary axis.

Test: Frequency Domain Analysis of Control Systems - 1 - Question 10

The magnitude of frequency response of an under-sampled second order system is 5 at 0 rad/sec and peaks to 10/√3 at 5√2 rad/sec. The transfer function of the system is

Detailed Solution for Test: Frequency Domain Analysis of Control Systems - 1 - Question 10

DC gain = 5

100 [4ε2 (1 – ε2)] = 3
400 ε2 – 400 ε4 = 3
400 x2 – 400 x + 3 = 0  
x2 – x + 0.0075 = 0
ξ2 = 0.99244 , ξ2 = 0.00755
ξ = 0.99 , ξ = 0.08689
If resonant peak > 1 then

ωn = 7 rad/s

K = 49 × 5 = 245

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