Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem Old 161905 Control Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (OLD) EXAMINATION ? WINTER 2018
Subject Code:161905 Date: 20/11/2018
Subject Name: Control Engineering
Time: 02:30 PM TO 05:00 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 (a) Justify the following statements if true:
(1) Feedback control systems are also referred to as closed?loop systems.
(2) Fixed-time traffic light control system is an example of closed loop control
system.
(3) In a multivariable control system there is one input variable but variable outputs.
07
(b) What do you understand by Transient and steady state response and hence discuss
the various types of input test signals used for time response analysis of a control
system
07
Q.2 (a) Define transfer function of a linear time invariant control system and hence discuss
its properties. Also discuss the role of Laplace Transforms in system analysis.
07
(b) What is modern control theory? Compare modern control theory with conventional
control theory. Classify different types of control problems.
07
OR
(b) What is servo mechanism? Explain how it can be best applied for automation
control? Explain servo mechanism in CNC machines.
07
Q.3 (a) What is system analogy? Describe analogy between following systems
? Translational mechanical and Rotational mechanical systems.
? Force and Voltage system.
? Force and current system
07
(b) Draw the signal flow graph of the block diagram shown in Fig and solve using
Mason?s gain formula.
07
OR
Q.3 (a) What is signal flow graph (SFD)? Write the steps for solving signal flow graph
using Mason?s gain formula.
07
(b) Explain transient response (time domain) specifications of second order control
system with neat sketch.
07
Q.4 (a) Explain Routh?s stability criterion. What is Advantages and Disadvantages of
Routh?s criterion?
07
(b) Define: Root locus. Write steps for solving Problems on Root Locus. 07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (OLD) EXAMINATION ? WINTER 2018
Subject Code:161905 Date: 20/11/2018
Subject Name: Control Engineering
Time: 02:30 PM TO 05:00 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 (a) Justify the following statements if true:
(1) Feedback control systems are also referred to as closed?loop systems.
(2) Fixed-time traffic light control system is an example of closed loop control
system.
(3) In a multivariable control system there is one input variable but variable outputs.
07
(b) What do you understand by Transient and steady state response and hence discuss
the various types of input test signals used for time response analysis of a control
system
07
Q.2 (a) Define transfer function of a linear time invariant control system and hence discuss
its properties. Also discuss the role of Laplace Transforms in system analysis.
07
(b) What is modern control theory? Compare modern control theory with conventional
control theory. Classify different types of control problems.
07
OR
(b) What is servo mechanism? Explain how it can be best applied for automation
control? Explain servo mechanism in CNC machines.
07
Q.3 (a) What is system analogy? Describe analogy between following systems
? Translational mechanical and Rotational mechanical systems.
? Force and Voltage system.
? Force and current system
07
(b) Draw the signal flow graph of the block diagram shown in Fig and solve using
Mason?s gain formula.
07
OR
Q.3 (a) What is signal flow graph (SFD)? Write the steps for solving signal flow graph
using Mason?s gain formula.
07
(b) Explain transient response (time domain) specifications of second order control
system with neat sketch.
07
Q.4 (a) Explain Routh?s stability criterion. What is Advantages and Disadvantages of
Routh?s criterion?
07
(b) Define: Root locus. Write steps for solving Problems on Root Locus. 07
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2
OR
Q.4 (a) Find the range of gain for a system whose closed-loop transfer function is
07
(b) Explain unit step response of first order system. 07
Q.5 (a) Compare hydraulic control system with pneumatic control system in detail. State the
different applications of pneumatic control system.
07
(b) Write short note on : control systems for thermal power plant 07
OR
Q.5 (a) Write short note on: Programmable Logic controller (PLC). 07
(b) Define fuzzy logic. Explain the concept of Fuzzy logic with a suitable example. 07
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This post was last modified on 20 February 2020