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11/24/2020

Control systems - - Unit 3 - Week 1

X

(https://swayam.gov.in)

(https://swayam.gov.in/nc_details/NPTEL)

[email protected]  NPTEL (https://swayam.gov.in/explorer?ncCode=NPTEL) » Control systems (course)

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Unit 3 - Week 1 Course outline

Assignment 1

How to access the portal Pre-requisite Assignment Week 1

The due date for submitting this assignment has passed. As per our records you have not submitted this assignment. 1)

Overview of Feedback Control Systems - Part 1 (unit?unit=6&lesson=9)

linear non-anticipative nonlinear No, the answer is incorrect. Score: 0 Accepted Answers: non-anticipative 2)

Overview of Feedback Control Systems- Part 2 (unit?unit=6&lesson=10)

LECTURE NOTES (unit? unit=6&lesson=13)

Quiz : Assignment 1 (assessment?name=123) New Lesson (unit? unit=6&lesson=135)

1 point

linear and time varying nonlinear and time invariant nonlinear and time varying No, the answer is incorrect. Score: 0 Accepted Answers: linear and time varying 3) Consider a washing machine unit to which an electric current is provided as input and the rotational speed of the drum is the output. Then, if one 1 point wants to find a mathematical relationship between the electric current input and the drum rotational speed output, then one is solving the problem of

WEEK 1 - Assignment Solution (unit? unit=6&lesson=14) Week 1 - Feedback: Control systems (unit? unit=6&lesson=15)

A system whose governing equation is y(t) = tu(t) , is linear and time invariant

Mathematical Preliminaries Part 1 (unit? unit=6&lesson=11) Mathematical PreliminariesPart 2 (unit? unit=6&lesson=12)

1 point

anticipative

Introduction to Control Systems - Part 1 (unit? unit=6&lesson=7) Introduction to Control Systems - Part 2 (unit? unit=6&lesson=8)

A causal system is always

Due on 2019-08-14, 23:59 IST.

synthesis prediction control estimation No, the answer is incorrect. Score: 0 Accepted Answers: synthesis 4)

Week 2

Which one of the following is an example of open loop control?

1 point

Air conditioner Servo motor

Week 3

Water tank level control Ceiling fan

Week 4 Week 5 Week 6

No, the answer is incorrect. Score: 0 Accepted Answers: Ceiling fan 5)

When the mapping in the feedback path is not equal to one, it is called as

1 point

Week 7 non-unity feedback Week 8

negative feedback unity feedback

Week 9 Week 10

positive feedback No, the answer is incorrect. Score: 0 Accepted Answers:

https://onlinecourses.nptel.ac.in/noc19_de04/unit?unit=6&assessment=123

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Week 11 Week 12

Control systems - - Unit 3 - Week 1

non-unity feedback 6) In a typical closed loop system layout, the element that takes the controller output and realizes the same to provide it as the system input is called1 point as the plant

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actuator sensor No, the answer is incorrect. Score: 0 Accepted Answers: actuator 7)

The dynamics of the element that measures the output of the system and provides feedback is called as

1 point

plant dynamics controller dynamics sensor dynamics actuator dynamics No, the answer is incorrect. Score: 0 Accepted Answers: sensor dynamics 8)

The class of linear time varying causal SISO dynamic systems is typically characterized by

1 point

linear ODEs with constant coefficients nonlinear ODEs with constant coefficients linear ODEs with time varying coefficients nonlinear ODEs with time varying coefficients No, the answer is incorrect. Score: 0 Accepted Answers: linear ODEs with time varying coefficients 9)

A mass spring damper system is governed by

. This system is

1 point

nonlinear linear time varying non-causal No, the answer is incorrect. Score: 0 Accepted Answers: nonlinear 10)

The complex function

is singular at

1 point

only s = -1 only s = -2 s = -1 and s = -2 s = -3 No, the answer is incorrect. Score: 0 Accepted Answers: only s = -1 11) The Laplace transform of

is

1 point

No, the answer is incorrect. Score: 0 Accepted Answers:

https://onlinecourses.nptel.ac.in/noc19_de04/unit?unit=6&assessment=123

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Control systems - - Unit 3 - Week 1

Questions 12-15: Consider the LTI system whose governing equation is step input be provided to this system 12) The value of the output as time tends to infinity is

Take the initial conditions to be zero and let a unit

1 point

0.25 -0.5 1 infinity No, the answer is incorrect. Score: 0 Accepted Answers: infinity 13) The coefficient of

in the output function is

1 point

0.2 -1 0.5 -0.5 No, the answer is incorrect. Score: 0 Accepted Answers: 0.2 14) The coefficient of

in the output function is

1 point

-0.25 -0.2 0.05 -0.5 No, the answer is incorrect. Score: 0 Accepted Answers: 0.05 15) Which ONE of the following statements is FALSE?

1 point

The output is bounded in magnitude for all time The only functions of time that appear in the output function are exponential functions. The value of the output function is zero when time is zero. The value of the output is non-zero as time tends to infinity No, the answer is incorrect. Score: 0 Accepted Answers: The output is bounded in magnitude for all time

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11/24/2020

Control systems - - Unit 4 - Week 2

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(https://swayam.gov.in)

(https://swayam.gov.in/nc_details/NPTEL)

[email protected]  NPTEL (https://swayam.gov.in/explorer?ncCode=NPTEL) » Control systems (course)

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Unit 4 - Week 2 Course outline

Assignment 2

How to access the portal Pre-requisite Assignment Week 1

1)

System Response- Part 2 (unit?unit=16&lesson=20)

1 point

transient response

Transfer Function - Part 1 (unit?unit=16&lesson=17)

System Response - Part 1 (unit?unit=16&lesson=19)

The response of a system to an external input is called forced response

Week 2

Transfer Function- Part 2 (unit?unit=16&lesson=18)

Due on 2019-08-21, 23:59 IST.

The due date for submitting this assignment has passed. As per our records you have not submitted this assignment.

free response steady state response No, the answer is incorrect. Score: 0 Accepted Answers: forced response 2)

A second order system is governed by

Its transfer function is

1 point

BIBO Stability - Part 1 (unit? unit=16&lesson=21) BIBO Stability- Part 2 (unit? unit=16&lesson=22) Quiz : Assignment 2 (assessment?name=124) WEEK 2 - Assignment Solution (unit? unit=16&lesson=23) Week 2 - Feedback: Control systems (unit? unit=16&lesson=24)

Week 3

No, the answer is incorrect. Score: 0 Accepted Answers:

Week 4 Week 5

3)

The transfer function of a causal system/plant is

1 point

proper

Week 6

linear improper

Week 7

non-unique Week 8 Week 9 Week 10 Week 11 Week 12 DOWNLOAD VIDEOS Live Sessions

No, the answer is incorrect. Score: 0 Accepted Answers: proper 4)

The poles of the transfer function of the system whose governing equation is

are

1 point

-1, -3 1, 3 1, -4 -1, 4 No, the answer is incorrect. Score: 0 Accepted Answers: -1, 4

https://onlinecourses.nptel.ac.in/noc19_de04/unit?unit=16&assessment=124

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Control systems - - Unit 4 - Week 2

5)

The zeros of the transfer function of the system whose governing equation is

are

1 point

2, -1 -2, 1 -1+j, -1-j -2+j, -2-j No, the answer is incorrect. Score: 0 Accepted Answers: -1+j, -1-j Questions 6-8: Calculate the expression for the unit step response of the system whose governing equation is 6)

The steady state value of the output (as time tends to infinity) is

1 point

1 0.5 0.2 0.1 No, the answer is incorrect. Score: 0 Accepted Answers: 0.2 7)

The coefficient of the

term in the output function is

1 point

0.25 -0.25 0.5 -0.5 No, the answer is incorrect. Score: 0 Accepted Answers: -0.25 8)

The coefficient of the

term in the output function is

1 point

0.05 0.25 0.5 1 No, the answer is incorrect. Score: 0 Accepted Answers: 0.05 Questions 9-10: Calculate the unit step response of the system whose governing equation is 9)

The steady state value of the output (as time tends to infinity) is

1 point

1 0.5 0.2 infinity No, the answer is incorrect. Score: 0 Accepted Answers: infinity 10) The coefficient of the

term in the output function is

1 point

0.2 -0.2 0.04 0.25 No, the answer is incorrect. Score: 0 Accepted Answers: 0.04 11) Consider the system whose governing equation is

The input for which the system output would be unbounded is

1 point

1 sin(2t) cos(√2t) sin(t) No, the answer is incorrect. Score: 0 Accepted Answers: sin(2t)

https://onlinecourses.nptel.ac.in/noc19_de04/unit?unit=16&assessment=124

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Control systems - - Unit 4 - Week 2

12) Consider the system whose governing equation is

The input for which the system output would be unbounded is

1 point

The system output would be unbounded for

1 point

The system output would be unbounded for

1 point

1 cos(3t) sin(√3t) cos(t) No, the answer is incorrect. Score: 0 Accepted Answers: 1 13) Consider the system whose governing equation is only u(t)=1 only u(t)=cos(2t) any bounded input only u(t)=cos(4t) No, the answer is incorrect. Score: 0 Accepted Answers: any bounded input 14) Consider the system whose governing equation is only u(t)=1 only u(t)=cos(3t) any bounded input only u(t)=sin(t) No, the answer is incorrect. Score: 0 Accepted Answers: any bounded input 15) Consider the system whose governing equation is TRUE?

Which ONE of the following statements is1 point

The multiplicity of the -1 pole and -3 pole is 1 and 2 respectively The multiplicity of the -1 pole and -3 pole is 2 and 1 respectively The multiplicity of the -1 pole and -3 pole is 1 and 1 respectively The multiplicity of the -1 pole and -3 pole is 2 and 2 respectively No, the answer is incorrect. Score: 0 Accepted Answers: The multiplicity of the -1 pole and -3 pole is 2 and 2 respectively

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11/24/2020

Control systems - - Unit 5 - Week 3

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(https://swayam.gov.in/nc_details/NPTEL)

[email protected]  NPTEL (https://swayam.gov.in/explorer?ncCode=NPTEL) » Control systems (course)

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Unit 5 - Week 3 Course outline

Assignment 3

How to access the portal Pre-requisite Assignment Week 1

Due on 2019-08-21, 23:59 IST.

The due date for submitting this assignment has passed. As per our records you have not submitted this assignment. 1)

A LTI system is governed by

The dominant pole is

1 point

-12 Week 2

-10 -2

Week 3

-4 Effect of Zeros - Part 1 (unit? unit=25&lesson=26) Effect of Zeros- Part 2 (unit? unit=25&lesson=27) Closed Loop System - Part 1 (unit?unit=25&lesson=28)

No, the answer is incorrect. Score: 0 Accepted Answers: -2 2)

The steady state value of the unit step response of the system given in problem 1 is

1 point

0.2 Closed Loop System- Part 2 (unit?unit=25&lesson=29)

1 3

First Order Systems - Part 1 (unit?unit=25&lesson=30) First Order Systems- Part 2 (unit?unit=25&lesson=31) Quiz : Assignment 3 (assessment?name=126) Week 3 - Feedback: Control systems (unit? unit=25&lesson=32)

4 No, the answer is incorrect. Score: 0 Accepted Answers: 0.2 3) In the unit step response of the system given in problem 1, the coefficient that multiplies the exponential term whose exponent is the dominant pole is -0.2 0.5

WEEK 3 - Assignment Solution (unit? unit=25&lesson=33)

Week 4 Week 5 Week 6 Week 7

1 point

0.75 -0.125 No, the answer is incorrect. Score: 0 Accepted Answers: -0.125 4)

A zero of a transfer function in the right half complex plane is called

1 point

a stable zero an unstable zero

Week 8 Week 9 Week 10

a minimum phase zero a non-minimum phase zero No, the answer is incorrect. Score: 0 Accepted Answers: a non-minimum phase zero

Week 11 Week 12

5) The governing equation of a first order LTI system with time delay is system using the 1st order Pade approximation is

The approximate transfer function of this

1 point

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Control systems - - Unit 5 - Week 3

No, the answer is incorrect. Score: 0 Accepted Answers:

6)

Consider a negative unity feedback system whose plant transfer function is

and controller transfer function is s+1. Then, the closed

1 point

loop transfer function is

No, the answer is incorrect. Score: 0 Accepted Answers:

7)

If one considered unity positive feedback in problem 6, with everything else remaining the same, the corresponding closed loop transfer function 1 point

is

No, the answer is incorrect. Score: 0 Accepted Answers:

8)

Which ONE of the following statements is TRUE about problems 6 and 7?

1 point

The closed loop system is stable with negative feedback but not with positive feedback The closed loop system is stable with positive feedback but not with negative feedback The closed loop system is stable with both positive and negative feedback The closed loop system is unstable with both positive and negative feedback No, the answer is incorrect. Score: 0 Accepted Answers: The closed loop system is stable with negative feedback but not with positive feedback 9)

The open loop transfer function corresponding to problem 6 is

https://onlinecourses.nptel.ac.in/noc19_de04/unit?unit=25&assessment=126

1 point

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Control systems - - Unit 5 - Week 3

No, the answer is incorrect. Score: 0 Accepted Answers:

10) The open loop transfer function corresponding to problem 7 is

1 point

No, the answer is incorrect. Score: 0 Accepted Answers:

11) Which ONE of the following statements is TRUE about a stable first order LTI system?

1 point

The unit step response always converges to zero as time increases to infinity The unit impulse response converges asymptotically to a non-zero value as time increases to infinity The magnitude of the unit ramp response tends asymptotically to a finite value as time increases to infinity It has one pole in the left half complex plane No, the answer is incorrect. Score: 0 Accepted Answers: It has one pole in the left half complex plane 12) At a time instant equal to thrice the time constant of a stable first order LTI system, the ratio of its unit step response value to the final asymptotic 1 point value of its unit step response is 0.632 0.865 0.95 0.982 No, the answer is incorrect. Score: 0 Accepted Answers: 0.95 13)

When the system whose transfer function is

is subjected to a unit step input, the difference between the output and the input

1 point

asymptotically tends to 0.25 -0.5 1 -1 No, the answer is incorrect. Score: 0 Accepted Answers: -0.5 14) The governing equation of a first order LTI system is

. The steady state value of its unit step response is

1 point

1 2 4 0.5 No, the answer is incorrect. Score: 0 Accepted Answers: 2 15) The governing equation of a first order LTI system is

Which ONE of the following statements about this system is TRUE? 1 point

Its response has an oscillatory component

https://onlinecourses.nptel.ac.in/noc19_de04/unit?unit=25&assessment=126

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Control systems - - Unit 5 - Week 3

It is unstable Its settling time is 1 s The steady state value of its unit step response is 1 No, the answer is incorrect. Score: 0 Accepted Answers: Its settling time is 1 s

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Control systems - - Unit 6 - Week 4

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Unit 6 - Week 4 Course outline

Assignment 4

How to access the portal Pre-requisite Assignment Week 1

Due on 2019-08-28, 23:59 IST.

The due date for submitting this assignment has passed. As per our records you have not submitted this assignment. 1)

A second order system is governed by

It is

1 point

Its natural frequency (in rad/s) is

1 point

underdamped Week 2

overdamped undamped

Week 3

critically damped Week 4 Second Order Systems - Part 1 (unit?unit=34&lesson=35) Second Order Systems- Part 2 (unit?unit=34&lesson=36)

No, the answer is incorrect. Score: 0 Accepted Answers: overdamped 2)

9

Controllers - Part 1 (unit? unit=34&lesson=37)

3 1

Controllers- Part 2 (unit? unit=34&lesson=38) Closed Loop Control - Part 1 (unit?unit=34&lesson=39) Closed Loop Control- Part 2 ...