Download PTU B-Tech EEE 2020 Dec 6th Sem 71149 Non Linear And Digital Control Systems Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 6th Sem 71149 Non Linear And Digital Control Systems Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
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
M.Code : 71149
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CAND IDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN question s carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION?A
Answer briefly :
1.
Give significance of zero order hold device.
2.
State disadvantages of digital control system.
3.
What do you mean by singular points? State its importance.
4.
Comment on controllability and observability of systems with pole zero cancellation.
5.
Define describing function and give its value for an ideal relay.
6.
Find the z-transform of e?at sin t.
7.
Explain the process of reconstruction of sampled signal.
8.
What are the advantages of modern control theory over classical control theory?
9.
State the limitations of Z-transform.
10. Define dead-zone and backlash.
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SECTION-B
11. A sampler and ZOH are introduced in the forward loop. Study the stability of the sampled
data system via bilinear transformation.
?
s
5
r t
( )
G
G
s)
1
h (
0( )
s
s( )
t
s(s 1)(s 2)
?
T = 1sec
Plant
12. The output y(t) of a non linear device is related to the input x(t) through the following
differential equation:
y(t) = 4x2 + 6x + 3x2 x
Determine the describing function of this device.
13. Write a short note on dead zone and saturation.
14. Explain the isoclines method for analyzing stability of non linear systems graphically.
15. For the system x + x2 ? 1 = 0. Draw the phase plane trajectory using delta method taking
zero initial conditions.
SECTION-C
16. State and explain Lyapunov's stability theorem for linear digital systems.
17. Write short notes on the following :
a. Model reference adaptive controller.
b. Krasovskii's Theorem.
18. 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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