B.TechSemester 62021-22Control SystemKEC602

Control System (KEC602) - AKTU Question Paper 2021-22

B.Tech · Semester 6 · Free PDF Download

This is the official AKTU Control System Previous Year Question Paper for B.Tech Semester 6, academic session 2021-22. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 6

Session:2021-22

University:AKTU / UPTU

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Questions Asked in 2021-22

Control System (KEC602) — complete question paper

Section AAttempt all q u e s t i o n s i n b r i e f . 2*10 = 20

a
Compare any four differences between close loop and open loop system. 1
b
Draw the Elementary Block Diagram of open loop and close loop system. 1
c
Enlist the condition for a system to be controllable. 2
d
List any two advantages of space state model over transfer function model. 2
e
Define Settling time and Maximum peak overshoot. 3
f
Define Rise time and Peak Time. 3
g
Illustrate how the location of poles of a system related to stability. 4
h
Describe the Angle of Departure. 4 (i) Define Gain Cross Over Frequency. 5 (j) Enlist the significant of Polar plot. 5

Section BAttempt any three o f t h e f o l l o w i n g : 10*3 = 30

a
Obtain overall Transfer function for the given block diagram shown in Figure using Block reduction Method
b
Construct the state space model for the system described by the differential equation below. The output matrix should be independent of input and be able to measure each state variable
c
The system shown in fig(a) when subjected to a unit step input, the output response is shown in fig(b). Determine the value of K & T from the response curve. fig.(a) fig.(b)
d
Using Routh Hurwitz Criterion, discuss the stability of the cha racteristic equation
e
A single loop feedback control system has open loop transfer fu nction G(s) .Sketch the Nyquist plot

Section CAttempt any one p a r t o f t h e f o l l o w i n g : 10*1 = 10

a
For the system shown in Figure, obtain the transfer function by signal flow graph method
b
Using Mason’s gain formula, evaluate the overall transfer function
a
A single input single-output system has transfer function, enli s t t h e s t a t e equations, and draw the state diagram
b
Examine the Controllability and Observability of the following system
a
The open loop transfer function of a unity feedback system is given by Where ‘K’ & ‘T’ are positive constants. By what factor should the amplifier gain be reduced so that the peak overshoot of unit step response of the system is reduced from 75% to 25%
b
Evaluate the unit step response with proper derivation for an u nder damped 2nd order system
a
For a unity feedback system of O.L.T.F is given by
a
Sketch the root locus for
b
At what value of K, the system become unstable
b
For a unity feedback system of O.L.T.F is given by
a
Sketch the root locus for
b
At what value of K, the system become stable
a
Sketch the Bode Plot for the given system and comment on stabil ity of the used systems
b
S Sketch the Bode Plot for the given system and comment on stability of the used systems

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KEC602

Questions that appeared in more than one session, found by comparing 3 years of Control System papers (2021-22, 2022-23, 2023-24)

Enlist the condition for a system to be controllable. 2