B.Tech-B.Tech Electrical Engineering 5th Sem 5EE3 Control Systems(Rajasthan Technical University-2012)

5E3125
B. Tech. V Sem.(Main/Back) Exam. Dec. 2012
Electrical Engg.
5EE3 Control Systems
(Common For EE and Ex)

Time : 3 Hours

Maximum Marks : 80

Min. Passing Marks : 24

Unit-1

Q 1. (a) What do you mean by time variant system? And how is it different from time invariant system? [6]

(b) Explain following terms -

(1) Servomechanism

(2) Command input

(3) Reference input

(4) Forward path

(5) Feedback path [5X2=l0]

Unit-3

Q3. (a) For the system shown in figure, find the error using dynamic error coefficient method for input of. (6 + 5 t + 6 t 2/2). [10]

 

 

 

 

 

 

 

 

 

 

Q3: (b) Asystem has open loop transfer function. [6]

G(S)H(S) = 10/S(S+5)

Find the undamped natural frequency, damping ratio, damped natural frequency, rise time, peak time, peak overshoot and settling time with 2% criterion.

OR

Q3 . (a) Explain following tenns with respect to time response specification -

(1) Delay time.

(2) Rise time.

(3) Peak overshoot.

(4) Peak time.

(5) Setting time.

(6) Steady state error. [6X2=12]

3 . (b) The block diagram shown in the fig. represents a heat treating oven. The set pointe desired temperature) is 1000degcel. What is steady state temperature? [4]

 

 

 

 

 

 

 

 

 

 

Unit-IV

Q.4 . (a) Consider a unity feedback system with open loop transfer function consisting of 2 poles, 2 zeros and a variable gain k. The zeros are located at -2, -1 and poles are at -0.1, 1. Using Routh stability criterion, determine the range of values of k for which the closed loop system has 0,1 and 2 poles in the right half S plane.[8]

Q4. (b) Explain following:-

(i) Absolute and Relative stability

(ii) Polar and Cartesian plots [4x2=8]

OR

Q4. (a) Explain following:-

(i) M and N loci

(it) Nichols chart [4x2=8]

Q.4. (b) For a feedback Control System-

G(S)H(S) = 40/(S+4) (S+ 2S+ 2)

Find gain margin and stability from Nyquist plot. [8]

Unit-5

Q.5. (a) Explain following-(Anytwo)

(i) Log network

(n) Log-leadnetwork

(iii) Lead network [8x2=16]

OR

Q.5 (b) Write Down short Note on :- (Any two)

(i) Proportional Controller

(ii) Derivative Controller

(iii) Integral Controller [8x2=16]

Earning:  ₹ 10.00/-