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GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VI(NEW) - EXAMINATION - SUMMER 2019
Subject Code:2160104 Date:18/05/2019
Subject Name:Basic Control Theory
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q-1 (a) Cruise missile control is the example of closed loop system or open loop system. Justify the statement. 03
(b) Explain the difference between open loop and closed loop system. 04
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(c) Explain the rules for block diagram reduction technique. 07
Q-2 (a) Explain standard test input signals. 03
(b) Explain the difference between manmade and natural control system. 04
(c) Explain Mason’s gain formulae in detail. 07
OR
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Q-2 (a) Explain steady state error for type-0,1, and 2 system for step, ramp and parabolic. 07
Q-3 (a) Define transfer function and derive transfer function for RC series ckt. 03
(b) Explain the steps for plotting the Nyquist plot. 04
Q-3 (a) Draw the root locus of the system given as G(s)=K/s(s+5). Also determine the range of K. 07
OR
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(b) Explain difference between signal flow graph and block diagram reduction method. 03
(c) Explain different terms of time domain analysis with example. 04
Q-4 (a) The characteristic equation of the feedback system is F(s)=s4+6s3+2s2+5s+10. Using Routh’s Hurwitz criteria determine the stability of the system. 07
(b) Explain proportional controller in detail. 03
(c) Explain the steps to plot the bode plot. 04
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Q-4 (a) Sketch the root locus of the following system: K / s(s2 + 6s + 25) 07
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Q-4 (a) Explain State space analysis. 03
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(b) Explain relative stability of closed loop system. 04
(c) A unity feedback system has G(s)=K/s(s+2)(s+3). Using Routh’s Hurwitz criteria find the range of K for closed loop system to be stable. 07
OR
Q-5 (a) Explain Integral controller. 03
(b) Explain PI controller in detail. 04
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(c) Explain the difference between modern control theory and conventional control theory. 07
OR
Q-5 (a) Explain derivative controller 03
(b) Explain the following terms: proportional band, rate gain and direct action. 04
(c) Explain PID controller in detail. 07
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This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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