Jawaharlal Nehru Technological University Anantapur 2010-1st Sem B.Tech Code :R7411304 3 IV (R07) Regular s, ember/ember ADAPTIVE CONTROL SYSTEMS - Question Paper

Code :R7411304 3
IV B.Tech I semester (R07) Regular Examinations, November/December 2010
ADAPTIVE CONTROL SYSTEMS
(Electronics & Control Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
1. (a) discuss the term adaptive. What is the need for adaptive control? discuss with a simple
example.
(b) explain 2 degrees of freedom control of a system applied to a system with parameter
variation.
2. (a) discuss how recursive lowest squares (RLS) method is used to model the system with FIR
¯lter.
(b) Write a short note on transfer function modeling of discrete and continuous systems.
3. (a) What is robust high gain feedback control? discuss the steps involved in designing robust
high-gain control.
(b) Consider a system with the transfer function G(s) = k
s+1 where the gain `k' may change
in the range 0.1 to 10. Design a servo using soas principle so that the closed loop transfer
function is G(s) = 1
s2+s+1 independent of the process gain.
4. (a) discuss indirect LQG-STR algorithm based spectral factorization.
(b) discuss about indirect LQG-STR algorithm based on the ricalti formula.
5. Consider the ¯rst order system y(k+1) = ay(k)+ u(k), when `a' is an open loop pole. define
lyapunov's design to ¯nd the control legal regulations and adaptive legal regulations in order that the pole of `@' is moved
to a new desired position `@m'.
6. Consider the process G(s) = 1
s(s+@) where `@' is unknown parameter. Determine a controller
that con provide the closed loop system Gm(s) = w2
s2+2±ws+w2 : Determine MRAS based on gradient
theory.
7. (a) discuss 2 kinds zeigler Nichols of tuning of PI/PID controllers.
(b) A process is tested with a relay in closed loop. The ultimate gain for exhibiting the
oscillation 25 and the ultimate frequency is 5khz. Determine the parameters of PID
controller to be used with the system.
8. Write short notes on:
(a) Gain scheduling
(b) Auto tuning based on relay feed back
(c) Robust high gain feed back control
(d) Dual control.

Earning:   Approval pending.