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2003 Course Digital Control Systems

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Total No. of Questions : 12] [Total No. of Pages : 4 P1342 [3764]-212 B.E. (Electrical) DIGITAL CONTROL SYSTEMS (403149) (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answer any one question from each pair of questions Q. 1 & Q. 2, Q. 3 & Q. 4, Q. 5 & Q. 6, Q. 7 & Q. 8, Q. 9 & Q. 10, Q. 11 & Q. 12. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, electronic unprogrammable pocket calculator is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) Discuss the advantages and limitations of Digital Control System. [8] b) A discrete system is given as : [8] y(n) = x( n + 2). Check whether the system is. i) Static or Dynamic. ii) Linear or Nonlinear. iii) Shift invariant or Shift varying. iv) Causal or Non-causal. OR Q2) a) State and explain sampling theorem. Also describe reconstruction process. [8] b) Sketch a D.T. signal x(n) = 3 n for 1 n 3 and obtain i) y(n) = x(2n) ii) [8] y(n) = 2x(n) + (n) P.T.O.

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