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GUJARAT TECHNOLOGICAL UNIVERSITYBE - 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
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Instructions:1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
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Q1 (a) Justify the following statements if true: 07(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.
(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
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Q2 (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
Q2 (a) What is servo mechanism? Explain how it can be best applied for automation control? Explain servo mechanism in CNC machines. 07
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(b) What is system analogy? Describe analogy between following systems 07* Translational mechanical and Rotational mechanical systems.
* Force and Voltage system.
* Force and current system
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Q3 (a) Draw the signal flow graph of the block diagram shown in Fig and solve using Mason’s gain formula. 07This download link is referred from the post: GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
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