Test: Time Domain Analysis

# Test: Time Domain Analysis

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## 10 Questions MCQ Test Control Systems | Test: Time Domain Analysis

Test: Time Domain Analysis for Electrical Engineering (EE) 2022 is part of Control Systems preparation. The Test: Time Domain Analysis questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Time Domain Analysis MCQs are made for Electrical Engineering (EE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Time Domain Analysis below.
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Test: Time Domain Analysis - Question 1

### The system with the open loop transfer function 1/s(1+s) is:

Detailed Solution for Test: Time Domain Analysis - Question 1

Explanation: Type is defined as the number of poles at origin and order is defined as the total number of poles and this is calculated with the help of the transfer function from the above transfer function the type is 1 and order is 2.

Test: Time Domain Analysis - Question 2

### The identical first order system have been cascaded non-interactively. The unit step response of the systems will be:

Detailed Solution for Test: Time Domain Analysis - Question 2

Explanation: Since both the systems that is the first order systems are cascaded non-interactively, the overall unit step response will be critically damped.

Test: Time Domain Analysis - Question 3

### A third order system is approximated to an equivalent second order system. The rise time of this approximated lower order system will be:

Detailed Solution for Test: Time Domain Analysis - Question 3

Explanation: As order of the system increases the system approaches more towards the ideal characteristics and if the third order system is approximated to an equivalent second order system then the rise time of this will be smaller than the original system for any input.

Test: Time Domain Analysis - Question 4

A system has a single pole at origin. Its impulse response will be:

Detailed Solution for Test: Time Domain Analysis - Question 4

Explanation: For a single pole at origin the system is of type 1 and impulse response of the system with single pole at the origin will be constant.

Test: Time Domain Analysis - Question 5

When the period of the observation is large, the type of the error will be:

Detailed Solution for Test: Time Domain Analysis - Question 5

Explanation: The error will be the steady state error if the period of observation is large as the time if large then the final value theorem can be directly applied.

Test: Time Domain Analysis - Question 6

When the unit step response of a unity feedback control system having forward path transfer function G (s) =80/s(s+18)?

Detailed Solution for Test: Time Domain Analysis - Question 6

Explanation: The open loop transfer function is first converted into the closed loop as unity feedback is used and then value of damping factor is calculated.

Test: Time Domain Analysis - Question 7

With negative feedback in a closed loop control system, the system sensitivity to parameter variation:

Detailed Solution for Test: Time Domain Analysis - Question 7

Explanation: Sensitivity is defined as the change in the output with respect to the change in the input and due to negative feedback reduces by a factor of 1/ (1+GH).

Test: Time Domain Analysis - Question 8

An underdamped second order system with negative damping will have the roots :

Detailed Solution for Test: Time Domain Analysis - Question 8

Explanation: An underdamped second order system is the system which has damping factor less than unity and with negative damping will have the roots on the right hand side of complex plane as complex conjugates.

Test: Time Domain Analysis - Question 9

Given a unity feedback system with G (s) =K/ s (s+4). What is the value of K for a damping ratio of 0.5?

Detailed Solution for Test: Time Domain Analysis - Question 9

Explanation: Comparing the equation with the standard characteristic equation gives the value of damping factor, natural frequency and value of gain K.

Test: Time Domain Analysis - Question 10

How can the steady state error can be reduced?

Detailed Solution for Test: Time Domain Analysis - Question 10

Explanation: Steady state error is the error as it is the difference between the final output and the desired output and by increasing the input the steady state error reduces as it depends upon both the states and input.

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