Code: A-34
Subject: DIGITAL CONTROL ENGINEERING
Time: 3 Hours
Max. Marks: 100
NOTE: There are 11 Questions in all.  
  • Question 1 is compulsory and carries 16 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.
  • Answer any THREE Questions each from Part I and Part II. Each of these questions carries 14 marks.
  • Any required data not explicitly given, may be suitably assumed and stated.
Q.1
Choose the correct or best alternative in the following: (2x8)
   
a.
A linear time invariant discrete-time system is given as:
x (k+2) + 4x(k+1) + 3x(k) = 0 with x(0) = -1 and x(1) = 0. Then x(z) can be obtained as _______. 		 
(A)   (B)    
(C)   (D)    
b.
 The z - transform of  is __________.  
(A)   (B)    
(C) (D)    
c.
 Given the z - transform of Sin 2t as then, the z - transform of is ___________.  
(A)    (B)    
(C)    (D)    
d.
 If GH(z)= Z (G(s) H(s)) for the system given in Fig.1 is then ,  
the steady state error in response to a unit-step input can be obtained as  
(A) 2.0 (B) 1.5  
(C) 1.0 (D) 0.5  
1
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