My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Download Model question papers & previous years question papers
|
Posted Date: 20 Aug 2008 Posted By: Nitin Member Level: Platinum
|
2006 The Institution of Engineers,India A.M.I.E.T.E Electronics & Tele Communication Engineering CONTROL ENGINEERING University Question paper
Code: A-11 Subject: CONTROL ENGINEERING
Time: 3 Hours June 2006 Max. Marks: 100
NOTE: There are 9 Questions in all.
• Question 1 is compulsory and carries 20 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.
• Out of the remaining EIGHT Questions answer any FIVE Questions. Each question carries 16 marks.
• Any required data not explicitly given, may be suitably assumed and stated.
Q.1 Choose the correct or best alternative in the following: (2x10)
a. For type-2 system, the steady-state error due to ramp input is equal to
(A) zero. (B) finite constant.
(C) infinite. (D) one.
b. The Nyquist plot of a system passes through (-1, jo) point, the phase margin of the system is
(A) greater than zero. (B) zero.
(C) less than zero. (D) undefined.
c. The transfer function of a phase-lead compensator is given by where a > 1 and T > 0. The maximum phase-shift provided by such a compensator is
(A) . (B) .
(C) . (D) .
d. Given the matrix , its eigenvalues are:
(A) all negative and different (B) two are negative
(C) one is negative (D) all are negative with two of them being equal
e. The impulse response of a second-order under-damped system starting from rest is given by . The natural frequency and the damping factor of the system are respectively
(A) 10 and 0.6 (B) 10 and 0.8
(C) 8 and 0.6 (D) 8 and 0.8
f. In the system in Fig.1, . In the steady-state, the response y (t) will be
(A) (B)
(C) (D)
g. The steady-state error co-efficient for a system are given by and finite constant. The system is a
(A) type 0 system. (B) type 1 system.
(C) type 2 system. (D) type 3 system.
h. The input to a controller in a control system is
(A) sensed signal. (B) error signal.
(C) desired variable value. (D) servo signal.
i. The rotor terminals of a synchro-transmitter is energised with
(A) a.c. voltage. (B) a.c. voltage.
(C) a.c. voltage. (D) D.C. voltage.
j. The transfer function of a first-order electrical system is . The time-constant of the system is
(A) 10 seconds. (B) second.
(C) 2 seconds. (D) second.
Answer any FIVE Questions out of EIGHT Questions.
Each question carries 16 marks.
Q.2 Find the gains and for the signal-flow graph shown in Fig.2. (16)
Q.3 a. Show that the root loci for a control system with
are arcs of the circle centered at the origin
with radius equal to . (14)
b. Examine the stability of the system with K = 1. (2)
Q.4 a. The loop transfer function for a control system is given as . Determine the steady-state error for a unit-step input, a unit-ramp input and a parabolic input. (9)
b. Examine the stability of the system with K = 1? (7)
Q.5 The specifications of a second-order control system with the closed-loop transfer function are that the maximum overshoot must not exceed 10 percent and the rise time must be less than 0.1 second. Find the corresponding limiting values of and bandwidth analytically. (16)
Q.6 The loop transfer function G(s) H(s) of a single-loop feedback control system is given as . Sketch the Nyquist plot of for to . Determine the stability of the closed-loop system. (16)
Q.7 a. The characteristic equation of a control system is given as
. Determine the range of K for stability. (8)
b. Prove that for BIBO stability, the roots of the characteristic equation must lie in the left-half of s-plane. (8)
Q.8 Find the unit-step response for the control system shown in Fig.3. (16)
Q.9 Write short notes on any TWO of the following:
(i) P-I-D Controller.
(ii) D.C. servo-motor.
(iii) Phase-lead compensation. (16)
Attachments:
Return to question paper search
|
|
|
Submit Previous Years University Question Papers and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.
|
Advertise Here
|