Roll No. [ [ [ [ [ ] [T 1] Total No. of Pages : 02
Total No. of Questions : 18
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B.Tech.(EE/Electrical & Electronics Engg.) (2012 Onwards)
B.Tech. (Electronics & Electrical Engg.)/(Electrical Engineering &
Industrial Control) (2012 to 2017) (Sem.-6)
NON-LINEAR AND DIGITAL CONTROL SYSTEMS
Subject Code : BTEE-603
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M.Code : 71149
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
Answer briefly :
- Give significance of zero order hold device.
- State disadvantages of digital control system.
- What do you mean by singular points? State its importance.
- Comment on controllability and observability of systems with pole zero cancellation.
- Define describing function and give its value for an ideal relay.
- Find the z-transform of e sin .
- Explain the process of reconstruction of sampled signal.
- What are the advantages of modern control theory over classical control theory?
- State the limitations of Z-transform.
- Define dead-zone and backlash.
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SECTION-B
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A sampler and ZOH are introduced in the forward loop. Study the stability of the sampled data system via bilinear transformation.
The output y(7) of a non linear device is related to the input x(f) through the following differential equation:
(6)=4x*+ 6x + 3% %
Determine the describing function of this device.
Write a short note on dead zone and saturation.
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Explain the isoclines method for analyzing stability of non linear systems graphically.
For the system x + x* — 1 = 0. Draw the phase plane trajectory using delta method taking zero initial conditions.
SECTION-C
State and explain Lyapunov’s stability theorem for linear digital systems.
Write short notes on the following :
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- Model reference adaptive controller.
- Krasovskii’s Theorem.
Write a short note on ideal relay and relay with dead zone and hysteresis and draw its characteristics.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)
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