Exam Details
| Subject | control systems | |
| Paper | ||
| Exam / Course | pddc | |
| Department | ||
| Organization | Gujarat Technological University | |
| Position | ||
| Exam Date | January, 2019 | |
| City, State | gujarat, ahmedabad |
Question Paper
1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PD -SEMESTER 1 (NEW SYLLABUS) EXAMINATION- WINTER 2018
Subject Code: 2910901 Date: 09-01-2019
Subject Name: Control System
Time: 10:30 am to 01:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1
Give the comparison between open-loop and closed-loop system.
07
For the system shown in Figure, obtain the closed loop transfer function using block diagram reduction technique.
07
Q.2
Derive the Electrical equivalent model from following Mechanical model, apply Force Current analogy.
07
Derive the relationship between steady state error order of system, when applied step input.
07
OR
Derive expressions for static error coefficients. How these coefficients are useful in determining steady state error? State the limitations of static error coefficient method.
07
Q.3
Distinguish minimum phase system and non-minimum phase system with the help of example.
07
A unity feedback control system has an open-loop transfer function,
Sketch the root-locus plot of the system by determining the following:
Asymptotes Break away points if any
Centroid The value of K and the frequency at which the root loci cross the imaginary axis.
07
2
OR
Q.3
Define term signal flow graph and using Manson's gain formula obtain overall
transfer function of signal flow graph shown in Figure.
07
Explain the steps to draw root locus.
07
Q.4
What are the various time response specifications? Derive the expressions for any two specifications.
07
Draw the bode diagram for the following transfer function:
07
OR
Q.4
Explain the general procedure for constructing the Bode Plot. Also list its advantages.
07
Describe concept of Stability. Explain conditionally stable systems with appropriate example.
07
Q.5
Draw Proportional-Derivative controller, explain its working and determine its transfer function.
07
Explain Nyquist stability criterion.
07
OR
Q.5
Explain procedure to check system stability using Routh's stability criterion. Discuss special cases.
07
Write a short note on state space representation of a control system.
07
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PD -SEMESTER 1 (NEW SYLLABUS) EXAMINATION- WINTER 2018
Subject Code: 2910901 Date: 09-01-2019
Subject Name: Control System
Time: 10:30 am to 01:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1
Give the comparison between open-loop and closed-loop system.
07
For the system shown in Figure, obtain the closed loop transfer function using block diagram reduction technique.
07
Q.2
Derive the Electrical equivalent model from following Mechanical model, apply Force Current analogy.
07
Derive the relationship between steady state error order of system, when applied step input.
07
OR
Derive expressions for static error coefficients. How these coefficients are useful in determining steady state error? State the limitations of static error coefficient method.
07
Q.3
Distinguish minimum phase system and non-minimum phase system with the help of example.
07
A unity feedback control system has an open-loop transfer function,
Sketch the root-locus plot of the system by determining the following:
Asymptotes Break away points if any
Centroid The value of K and the frequency at which the root loci cross the imaginary axis.
07
2
OR
Q.3
Define term signal flow graph and using Manson's gain formula obtain overall
transfer function of signal flow graph shown in Figure.
07
Explain the steps to draw root locus.
07
Q.4
What are the various time response specifications? Derive the expressions for any two specifications.
07
Draw the bode diagram for the following transfer function:
07
OR
Q.4
Explain the general procedure for constructing the Bode Plot. Also list its advantages.
07
Describe concept of Stability. Explain conditionally stable systems with appropriate example.
07
Q.5
Draw Proportional-Derivative controller, explain its working and determine its transfer function.
07
Explain Nyquist stability criterion.
07
OR
Q.5
Explain procedure to check system stability using Routh's stability criterion. Discuss special cases.
07
Write a short note on state space representation of a control system.
07
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