MU Instrumentation Engineering (Semester 4)
Feedback Control System
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Attempt any four:
1 (a) Compare openloop and closeloop system with suitable example.
5 M
1 (b) State construction rules of root locus.
5 M
1 (c) Give correlation between time and frequency domain specifications.
5 M
1 (d) Comment on stability using bode plot.
5 M
1 (e) Explain the term relative stability and conditional stability with suitable example.
5 M

2 (a) Reduce the following block diagram using signal flow graph technique.

10 M
2 (b) Construct the bode plot for the system whose openloop transfer function is given by \[ G(s)= \dfrac {100}{s(s+0.5)(s+10)} \] Determine the gain margin and phase margin and comment on stability.
10 M

3 (a) Consider a system assume that value of gain 'K' is non negative \[G(s) = \dfrac {K}{s(s+1)(s+2)} \] Draw the root locus for a given system.
10 M
3 (b) Derive the unit step response of a second order underdamped system.
10 M

4 (a) Given \( G(s) H(s) = \dfrac {K}{s(Ts+1)} \) Test the given system for absolute stability using Nyquist plot.
10 M
4 (b) Obtain the transfer function of a Mechanical system shown below.

10 M

5 (a) For the following system.
Where = 0.6 and wn=5 rad/sec obtain (i) Rise time (ii) Peak time (iii) Maximum overshoot (iv) Settling Time. where the system is subjected to unit step input.

10 M
5 (b) Sketch the polar plot for a unity feed back closed loop system \[ G(s) = \dfrac {1}{s(s+1)^2} \]
10 M

6 (a) Obtain the static error coefficient for type 0, 1 & 2 system if the input to the each system is step, ramp and parabolic.
10 M
6 (b) Determine the stability of the system having the characteristics equation.
i) S5 + 6S4 + 15S3 + 30S2 + 44S + 24 = 0
ii) S5+3S4+10S2+S+8=0.
10 M



More question papers from Feedback Control System
SPONSORED ADVERTISEMENTS