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- Control System - CS
- 2016
- PYQ
**Dr. A.P.J. Abdul Kalam Technical University - AKTU**- Electrical and Electronics Engineering
- B.Tech
**161 Views**- 5 Offline Downloads
- Uploaded 8 months ago

2. NEE - 503 NEE - 503 Attempt any one part of the following: (10×1=10) The characteristics equation for a feedback control is, s3+5s2+12s+k=0 Find the range of K for all the roots to lie to the left of s = -1 Sketch the root locus for the closed loop control a) Discuss different type of test signal used for analysis of control system in time domain. The reference input to a unity feedback system is shown in fig. 4. 2m open loop transfer function of the system is. G (s) = b) system with 400 ( s + 1) 4. ( s + 2 )( s + 8) Calculate the steady-state error. Attempt any one Part of the following: (10×1=10) a) The steady state output of the system for a sinusoidal input of unit magnitude and variable frequency w is given as r(t) 2 G C ( ts)) == 10 b) 3. 30 20 Fig - 4 40 Discuss the effect on the performance of a second order control system of i) Derivative control ii) Integral control. Attempt any one part of the following a) 1K 27u Sin wt − tan −1 2 s ( s + 12) (2s + 42s +2 5 ) 1− u2 (1 − uDetermine ) + 4z u : b) (10×1=10) Explain the working principle of stepper motor with neat diagram. 503/12/2016/5600 (5) [P.T.O. i) Resonant frequency ii) Resonant Peak iii) Bandwidth iv) Phase angle. Draw Bode plot (log magnitude plot) for the transfer function. G (s) = 503/12/2016/5600 20 s s + 20 s + (100) 2 2 (6) http://www.uptuonline.com

NEE - 503 OR Using Nyquist stability criterion, Investigate the stability of a unity feedback system with open loop transfer function. G (s) = 5. ( s − z1 ) , s ( s + p1 ) ) z 1 , p1 > 0 Also discuss the significance of M circle. Attempt any one part of the following. (10×1=10) a) State and explain controllability and observability in view of Kalman and Gilbert test. The state equation for a system is −3 −1 1 X + u 0 −1 Gp ( s ) = X= 2 b) K s ( s + 10 )( s + 1000 ) check whether the system is completely Controllables. Design a phase lead compensator for a negative unity feed back system with plant transfer function. to satisfy the conditions : phase margin is atleast 450 static error constant =1000 S-1 _____________ 503/12/2016/5600 (7) http://www.uptuonline.com

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