1. a) Define a closed loop control system?
b) Give any one example of closed loop control system?
2. a) Define “transfer function” ?
b) Derive the transfer function of a series RLC network” ?
3. a) What is “ Block Diagram Algebra” ?
b) Discuss any three rules of block diagram algebra?
4. How do you eliminate a feed back loop in a control system by block diagram reduction
techniques?
5. a) What is ‘Mason’s Gain Formula’?
b) Explain the “determinant of graph ‘ ’” in ‘Mason’s Gain Formula’
6. Explain the procedure to determine the transfer function of a system by signal flow graph
method.
7. Derive the time response of a 1st order system.
8. Starting from the general expression C(s) /R(s) = Wn^2/s^2+2*€*Wn*s +Wn^2.Derive an expression for the response of a LTI 2nd order system when subjected to a unit step input.
9. A unity FB system is characterized by G(s)= 1/s(0.5s+1)(0.2s+1) .Determine ‘Steady State
Errors’ for unit step, unit ramp & unit parabolic inputs?
10. Consider the equation 2s^4+s^3+3s^2+5s+10=0. Find the no. of roots in the right half of s-plane.
11. Enlist the rules for sketching the Root Locus Plots ?
12 What is the range of ‘K’ for the system with characteristic ?
equation s^4+5s^3+5s^2+4s+k=0 to be stable. 05