IIT MADRAS M.S - CONTROL & INSTRUMENTATION
Hi, i am ABHINAV !
there was document verification for 1 hour,Then one sir came and told those who wish to write instrumentation part go to other room.As expected only 10-20 students went from for that.
Now it was control students' turn.We were split to 3 groups.and by 9.15 exam, the exam started.
There were 12 questions.It was a descriptive exam.We need to
write answer as well as the steps behind it.Questions were mainly from:
- State space analysis( 7 questions)
- Mathematics( 3)
- Analog Electronics (1)
- Digital(1).
Maths questions like eigenvector problem,differential
equation etc.analog part is to find equivalent capacitor in a ckt,digital is like to implement full adder using look up table method ( I dnt knw that method) and the control part was the most difficult,the following questions were asked.
- Find impulse response of a system such that A,B,C matrix form is given
- Derive a the condition for a transfer function with type 1.(a feed back system given G(S)) and H(S) ..we need to find parameters in G(S) like p,q,r,s that satisfy the condition).
- A,B,C,state transition matrix is given..in it state matrix is unbounded( e^T term present)..output matrix is bounded( e^-t) term was there)...comment on why it is like that?
My Attempt:
- I found the characteristics eqn using A matrix..and wrote system roots are purely imaginary..so marginally stable.many of my friends wrote the same.dnt knw correct answer..
- Draw 1/(s^2+1) +1/(s^2+4) pole zero plot root locus plot.
Rest of questions I can't recall.After 1 hour results were published.
Only 10 got shortlisted and they had interview from 12.30 onwards.Out of 10 mostly
5 will get admission to control MS.
Thank you Abhinav.He did his bachelor's in APPLIED ELECTRONICS & INSTRUMENTATION from College of Engineering Trivandrum.He has secured an AIR under 450 at GATE 2016.