even 2011 eee paper yea

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Exam Roll No ..................(Please write your Exam Roll No.)

END TERMEXAMINATIONEIGHTH SEMESTER [B.TECH. MAy-JUNE 2012

Paper Code: ETEE402 Subject: Advanced Control Systems

Time: 3Hours Maximum Marks :75

I Note: Attempt any five question including Q.no.1 which is compulsory. Select oneI question from each unit.

Ql (a) Determine the state transition matrix (t, 0) for the system

x =[~ ~t : J . (5x5=25)(b)Draw the phase plane trajectory of the system described as-

X+ 25(1+ 0 .lx2)x = 0 . Use Delta method and assume

Xl(0)= 3, Xz (0)= 0 .(c)What is pulse transfer function? Obtain discrete time state and

output equations and the pulse transfer function (sampling period

c T=l) for the following continuous time system

G (s) _ y(s) _ 1 -I - U(s) - s(s+ 2) .

(d)List and explain various methods of defuzzification.

(e) What are advantages of state space approach over transfer function?

Obtain state space representation for the following system

d3x d

2x dx

dt3 + 3 dtZ + 4 dt + 4x =u](t) + 3uz(t) + 4u3(t) .

ofsolutionComputestate

UNIT-I(a)A linear time invariant system is characterized by the homogeneous

[X l 1- [ 1 O ] [ X I].

equation XzJ - 1 1 X

z .

Q2

homogeneous equation, assuming initial state vector. (5)

. C(s) . s :+ 6(b)For the transfer function R() = z 5 6' Obtain state space

. S S + s+model by series (cascade) decomposition. (7.5)

Y C - t ..' )

Q3 (a) Define state variabies and derive state space model of the followingelectrical circuit. \)L{) (6.5)

8fv'/'tIttL-.-~ \__ ,(\ C~- - -I tr, G:

- - J ; cL * - )l

I

I

(b)Test and state controllability and observability of the above system. (6)

UNIT-IIQ4 (a) Differentiate between zero order hold and-first order hold.. (4)

P. T. O.

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(b) Consider the system shown in figure. Obtain closed loop

transfer function C(Z)jR(Z). Also obtain expression for C(s).

sQ5 (a) Obfain Z transform of XeS ) = (s + 1)2(s + 2) by usmg (1) partial

fraction expansion method and (2) the residue method. (6.5)

(b) Obtain the . inverse Z transform of

XfZ

) = 0.368z2

+0.478z+0.159

~ (z-1)Z 2 by use of inversion integral

Q6

method.

UNIT-III .

(a) Define Lyapunov stability criteria.

(b)If a system is described by following state

[X I ] [ 0 1 ] [ X 1 ]X 2 = - 1 - 1 x2

Determine stability of the system.

(6)

(4)

equation,

(8.5)

Q7 (a) Find describing function for the non-linearity- Relay with dead zone

and hysteresis. (6)

(b)What are limit cycles? How can stability of a limit cycle can be judged

by perturbation technique? (6.5)

UNIT-IV

Q8 (a) What is mean by adaptive control? What is the objective and

adaptation procedure? (6.5) )

(~)Explain Model Reference Adaptive Cpntrol (MRAC)Technique. (6)

Q9 (a) Explain T-S Fuzzy Model taking example of washing machine. (6.5)

(b)Three fuzzy sets are given as follows:-

p = e ~ !+0~3+ i + 0~4+ ~~}Q ={ o . ! + 0.3+0.3 +0.4+0.5 +0.2}. 0. 1 0. 2 0. 3 0. 4 0. 5 0~6

T {0. 1 0. 7 0. 3}= 0+ 0.5 + -1- . Perform following operations on fuzzy sets-

(i) R=PxQ (ii)S=QxT (iii)M=RoS (6)************


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Exam Roll No .. . C i )

END TERM EXAMINATIONEIGHTH SEMESTER B.TECH.] MAy-JUNE 2012

Paper Co de: ETEE404 Sub ject : Fl exi bl e A .C. Tr ans mi ssi on Sys tem ITime: 3 Hours Maximum Marks :75

Note: Attempt any five question including Q.no.1 which is compulsory. Select one

question from each unit.

(Please write your Ex.am Roll No.)

Ql (a) A fixed shunt capacitor is placed in parallel with the controlled

susceptance of TCR. Why? (5x5=25)

(b)What is load compensation?

(c) Explain syrnmetricalline.

(el) W-ritetwo differences between series and shunt compensators.

(e).~ame four characteristics of disturbance causing variation in voltage.

UNIT-I

Q2 (a) Explain the voltage and current profiles for symmetrical line when

receiving end is kept open. (6.5)

(b) Explain the effect of pf on receiving-end voltage in uncompensatedline under load. (6)

Q3 (a) Explain different methods ofvoltage control in transmission line. (6)

(b)Explain the methods of obtaining flat voltage profile in transmission

lines and discuss.its importance. (6.5)

UNIT-II

Q4 (a) Why compensation is required for transmission lines? Explain the

objectives of compensation. . (6)

(b)Why there is a need of uniformly distributed compensation in

transmission line? Explain its effect on voltage control. (6.5)

Q5 (a)Explain the difference between passive and active compensators. (6)

(b) Describe how the midpoint shunt reactors mitigate the midpoint

voltage sag under load? (6.5)

UNIT-III

Q6 (a) Explain the principle of operation, of TCR. Explain how it is made to

generate reactive power? (6)

(b) Explain the characteristics and operation of synchronous condenser. (6.5)

Q7 (a) Explain the two basic schemes of operation of IPC. (6)

(b)Show how the active and reactive po~er is controlled independently inUPFC? . (6.5)

UNIT-IV

Q8 (a) Draw and explain the flowchart of an optimal power Howalgorithm. (6.5)

(b) List out the benefits for application of a reactive power dispatching

strategy. (6)

Q9 Write short notes on the following:-

(a) Sub synchronous Resonance :

(b)Concept of reactive power optimization.

(c) Passive shunt compensation.

(4+4+4.5)

************


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Exam Roll No ......................(Please write your Exam Roll No.)

END TERM EXAMINATIONMAy-JUNE 2012

Subject: Instrumentation

Time: 3Hours Maximum Maries:75

I Note: Attempt all questions. Q.no.1 is compulsory. Internal choice is indicated~

Q 1 (a) Explain the working of a spectrum analyzer with the help of a block

diagram.

(b)Why is regulated power supply necessary for signal generators?

(c)What is induction heating? What are its advantages?

(d)What are the functions of robot auxillary control devices?

(e) Explain the principle of Permanent Magnet Motors. (5x5=25)

Q2 (a) How an instrumentation amplifier is different from an ordinary

operational amplifier? Draw the basic instrumentation amplifier

circuit. (6)

(b) Explain the principle and working of digital storage oscilloscope withthe help of block diagram. (6.5)

ORQ3 Explain in detail the principle and working ofIV1agnetic Tape Recorders

with suitable diagrams. Discuss their advantages and applications. (12.5)

Q4 (a) With the help of neat diagram explain the constructional features of a

stepper motor. Derive an expression for the stepping angle of a

stepper motor having m-phases and nnumber of rotor teeth. (6)

(b)Explain the principle of operation of variable frequency inverter with

suitable diagram. What are its applications? (6.5)

OR

Q5 (a) Discuss various types of timers. Explain the working of DashpotTimer in detai1. (6)

(b) Explain the construction and working of a Permanent Magnet

machine. What are their unique features? Also, discuss its function as

a controller. (6.5)

Q6 (a) What is the principle of dielectric heating? Explain its equivalent

circuit with vector diagram. What are its applications? (6.5)

(b)Explain the principle and working of automatic weighing system.

State its applications. (6)

OR

Q7 What is humidity? What. is the difference between absolute and relativehumidity? Explain with a block diagram how relative humidity can be

controlled in a computer warehouse? (12.5)

Q8 (a) What is binary number system? Why is it preferred to the decimal

system for use in computers? How can binary numbers be converted

to decimal numbers and vice-versa? I (6.5)

(b)What is a robot and what are its uses? Ex~lain the control scheme for

pick and place robot with a block diagram.' (6)

ORQ9 (a) What is a digital counter? What are its uses? Discuss synchronous

counters in detail. (6.5)

(b) Discuss the functions of various components of PLC. Draw a typicalladder diagram for starting and stopping of an induction motoL (6)

* * * * * * * * * * * *


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(Please write your Exam Roll No.) .. ( \ " Exam Roll No...............

END TERM EXAMINATIONEIGHTH SEMESTER (B.TECH. MAy-JUNE 2012

Paper Code:ETEE422 Subject: Power Quality Management

Time: 3 Hours Maximum Marks :75

I Note: Q.no.1 is compulsory. Attempt one question from each unit. ~

Ql Answer the following questions in brief:- (2.5xlO=25)

(a) Why is Power Quality so important?

(b) Differentiate between voltage sag and swell.

(c) What is the need of monitoring in power quality?

(d) What do you mean by Power Quality Management?

(e) Explain the term- Electromagnetic Compatibility.

(f) Describe the selection criteria for Harmonic filters.

(g) What is the importance of harmonic analysis?

(h) Discuss the effect of harmonics within the power ,system.

(i) What causes Power Quality problems?

U ) What will happen to the load if electrical system does not follow IEEE std-519?

UNIT-I

different International Power Quality Standards and Regulations in

(6.5)purpose of IEEE recommended practice for monitoring

(6)

(a) Explain the

detail.(b) Discuss the overview and

Power Quality.

Q2

(

Q3 (a) Explain IEEE std 519 and IEEE std 1159 in detai1.

(b) Write short notes on the following:-

(i) Sources of pollutions (ii)Electromagnetic Susceptibility

(6.5)

(6)

(iii)Electric Noise

UNIT-II

Q4 (a) Discuss in detail the ,phenomena of voltage sag and swell and also mention the

various measures should be taken to overcome these power quality problems. (6.5)

(b) Give detail explanation of the electromagnetic phenomena of "transients". Also,

discuss the types of transients and their effects on power system. (6)

Q5 (a) What do you mean by waveform distortion? Mention and explain the various types

of waveform distortion in detai1. (6.5)

(b) Explain the term power quality monitoring. Also, discuss its objectives and its

necessity in power quality studies. (6)

UNIT-III

Q6 (a) Explain in detail the power quality term "Harmonic Analysis". Also discuss its

objective and necessity in power quality studies. (6.5)

(b) Discuss in detail the concept interference of EHV lines with communication system. (6)

Q7 (a) Name and explain briefly the various types of harmonics sources with neat

sketches. (6.5)

(b) Explain transformer magnetization and how do magnetization affects the electrical

system? (6)

UNIT-IV

Q8 (a) Explain harmonics filters in detai1. Also, mention the selection criteria for harmonic

filters. (6.5)

(b) Explain the term Power Conditioning. Also, discuss the need of power conditioners

and their applications in electrical system. I (6)

Q9 (a) Discuss the various measures one shouldduration of outages in distribution system.

(b) Write short notes on the following:-

(i) Voltage Disturbance

(ii) Emergency and standby power supplies

(iii) Uninterruptible Power Supplies

* * * * * * * * * * * *

take to minimize the frequency and

( 6 . 5 )(6)

\. . . .~


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(Please write your Exam Roll No.) Exam Roll No .

EIGHTH SEMESTER B .TECH. - MAY JUNE 2EN TERM EX MIN TION

Paper Code:ETEE402 Subject: Advanced Control SystemTIme: 3 Hours Max imum Marks: 75

Note: Attempt jive questions including Q.no.l wh.ich is compulsory. Select oneques tion from each unit:Ql a] Find state transition matrix eAtfor given matrix A ~ I . I OJ.

illFor the given state equations test the controllability- r-I 0

X::;j:2 -1l3 I 3] r ] Y [1-I x O } L0 b]c Consider the following second order non differential equation d + dX _ 1+ x = O.

d/ dt(i) Determine the po in ts of equilibrium.(ii) Investigate the stability of the system near each point of equilibrium.Draw the phase plane trajectory for the differential equation x dx with initial condition--;-+.\- =0

elf fd

e]x(Oll and ~ O ~ 0

tA linear system is described by the state equation x 1~2by using LY PAUNOVs T heorem.

I: investigate the stability of the systemJ

5x5=25

Q2UNITI

Consider the system with state equation r XI ::j _ [ 0 x, - 0LX1U -6

(a] Transform above equation into canonical form.(b) Test the controllability of the system in part 2(a).

Ia

-II12.5

Q3 (a) State and explain the controllability and observability of the system.(hi n..,srcribe the state space representation of a system in different canon ical forms.

Q4 UNITII(a) Define a discrete system and indicate how it is different from continuous system?(b) Find the pulse transfer function of a pure Integrator with and without hold element.

(12 .5)

Q5 [a] Derive Z transform of COS{J t .[b] Find Z transform of the function St t -at .

Q6 UNITIIIla} Derive the describing function for non linearity as shown in fig-I. 6. 5

1~ -----r--\

II----..

Determine the describing function of a non linear device if the input x(t) and output y(t) are relatedthrough the following differential equation tlx.t , dx ..)l(I)~ ~ xell ell

Q7 (a) Consider a linear system described by the second-order differern ia e quation d~ + a dT + x = O.dt : dt

[b]6

Determine -(i) \ suitable LYaPunov function for this system.[ii] Find the range of values K and a for the system to be stable.

(b) Discuss the POPOV s stability criteria.

6. 5

6

Q UNIT-IV(a) Discuss the logic of model reference adaptive control and sclf tunning regulator.(b) Find the similarities and differences between the two configuration as in Q.8(al. 6. 56

Q [a] Discuss various advantages to use fuzzy logic.(b) Discuss the Fuzzy Controller architecture in brief.

66. 5

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(Please write your Exam. Roll No.) Exam. Roll No .

EN TERM EX MIN TIONEIGHTH SEMESTER [B.TECH.], MAY - 2011

Paper Code: ETEE-404 Subject: Flexible A.C. Transmission System

Time: 3 Hours Maximum Marks: 75Note: Question no. is compulsory. Attempt One question from each unit.

Q. 1. a.. (b)(c)d(e)f

Why the line is loaded normally to about 40 not on 70.,Draw the fundamental YI characteristics of TSC .Mention different objectives of line compensation:Why the FACT devices are necessary for healthy power system.What do you understand by SIL?Explain :-i Small signal stabilityii Transient stability

4(4) 4445

UNIT - IQ. 2. a Explain why reactive power is injected i~ the vicinity of load

centre rather than generated at power stations. 6

b Draw and explain the V-I profile as a function of length foruncompensated transmission line when it is open circuited atreceiving end.

(6.5) .

Q. 3~ a Why a flat voltage profile is desired for transmission line?Suggest various methods to achieve the same.

b Discuss the behaviour of uncompensated line for differentpower factor under load conditions.

(6.5)

(6)

UNIT - IIQ. 4. a What are the different constraints which limit the reactive

power generation of alternator?6

1 P.T.O.

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i

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. ~Please write your Exam Roll No. EN TERM EX MIN TION

Exam Roll No .

.TECH. -MAyJUNE2011Subject: Embedded Systems

Time: Hours Maximum Marks: 7Note:At tempt any five quest ions inc luding Q nol w hich is compulsory I

Ql Distinguish between the following terms with examples:-(a) Target and Host(b)In-circuited Emulator and Simulator(c) Linker and Locator(d)USB communication and 12Ccommunication(e) Stack Addressing and Direct Addressing of 8051

(5x5=25)

Q2 What is co-design? Explain it w ith the help of diagram? Compare co-design with traditional design of embedded systems. What is thestatus of PC, SP, PO,PSW and IE upon reset of 8051? (6+4+2.5)

.~, Draw the tool chain used for embedded systems applications~/ development and explain each tool with example. Is it possible to use

the tool chain used for desktop applications development forembedded systems? Justify your answer . (6+4+2.5)

Q Explain the 8051 architecture with the help of block diagram andshow how it is different from the 8085/8086 microprocessors? (10+2.5)

Explain the timer programming in 8051 and write a program togenerate the square wave at PO.Oby using timerO model with externalclock frequency of 12MHz and also calculate the frequency of thesquare wave. (5+5+2.5)

Q4 Explain the procedure used for serial data communication withreference to 8051 and write a program to send a word IPU with abaud rate cif9600. (Assume any missing data) (6+6.5)

Explain the interrupt structure in 8051 along with the interruptpriority register. Write a program for toggling the LED connected tothe PO.Oby using the timer 1 interrupt? (6+6.5)

Q Show the Interfacing diagram that illustrates the 8051 interfacingwith ADC and explain. the function of each signal.. How it is different[rom the DAC interfacing? (5.5+5+2)Show the Interfacing diagram that illustrates the 8051 interfacing

with stepper motor and write a program to rotate the steper motorclockwise? How do you control the speed and direction of the motor? (5.5+5+2)

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Exam Roll No .l~!-~

END TERMEXAMINATION

(Please write your Exam Roll No.)

EIGHTH SEMESTER B.TECH. MA y-2010

Supject: Advanced Control System

Maximum Maries :75

Note: Q.1 is compulsory. Attempt one question from each unit I

c>

Q1 fa ) Represent the differential equation in state variable form and find the

, . . . dZ

y 3 dy (state transltIOn matrIX dtZ + dt + 2y = u t) . (5)

(b)For the following state equation of a MIMO system

X =AX +BU and Y =CX +DU show that the transfer matrix take thefollowing formG(S)= C(SI- Ar1 B+ D. (5)

(c) Draw the phase plane portrait of the system defined by

x1=Xj+X2 , x2=2x]+xz. (5)

(d) Determine the pulse transfer function for the sampled data control

system shown in fig.I. (5)

~T ~ R ~ l1 + ,f ~I X _ . -;-~Is~~J(e)What do you understand by adaptive control system? (5)

UNIT~I

Q2 (a) Consider the dynamics of a non-homogenous system as

x( t) = [ 1JX (t) + [oJu(t) and output yet) = [1 }x(t) given the initial-6 -5 1

condition as x(O) = [lOY, where u(t) is a unit step input. Determine'the output y(t) at t=lsec. (7.5)

(b)Write any five properties of state transition matrix, ,p(t). (5)

Q3 (a) Check the controtability and observabi1ity of a system having

following coefficient matrix:-

A ~ r ~ ~ ~ J , B = l r ~ l and C T= f 1S0 J . (7.5)L-6 -11 -6 d II

(b)A mechanical system is shown in fig.2. Choose x(t) and xU ) as state

variable and represent system equations in state space form. (5)

)-~~ Je.-(t)

fCc)iQMd--~t B

UNIT-II

Q4 (a) What are the advantages of Discrete data control systems.

(b) Solve the difference equation using Z transform method

x(K +2) - O.lx(K +1) - 0.2x(K) = 2Us(K)

r(K) = Us(K) for K = 0 ,1,2 .... Given x(O)=O,x(l)=O.

(5)

where

(7.5)

P. T . O.

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Q5

[-2-]

(a) Deterrrii'ne the z-transform of following function F(8) = = 2(8 +1) . (6). . .. S(S+ 5)

(b) Given the state equation :-r(K + 1 ) = Ax(K) where A = [0 1 ] Find the0.5 1.'

state transition matrix (K). ( 6.5)

~.).

UNIT-III

Q6 la) Describe any two type of non-linearity which are present in a control

system. ( 5 )

(b) Derive the describing function for non-linearity shown in figure-3. (7.5)

~ t o

1 - ; ~ . { Q7

:

Fl4.-3

I \

(a) Determine the amplitude and frequency of the limit cycle of the

system shown in figA. (7.5)

i I

~

~-\

(5)

(6)

(6.5)

..

I

I . 1

(b) Explain Liapnov stability criteria.

I!

UNIT-IV

(a) What are the various functions of an adaptive controller?

(b) Describe in detail model reference adaptive control system.

.Q8. \.

Q9 (a) Give example of Fuzzy rule for control of any practical control system,

where fuzzy logic is applied. (6)

(b)What are various Fuzzy membership function which can be applied

for decision making in a control system. (6.5)

************

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(Please write your Exam Roll No.) Exam Roll No .

END TERM EXAMINATIONEIGHTH SEMESTER IS.TECH. MAY-2010

Subject: Flexible A. C. Transmission System

Maximum Marks :75

Note: Q.1 is compulsory. Attempt one question from each unit. ,

I Paper Code: ETEE404Time: 3 Hours

I

Ql

Q2

Q3

(a) What is Flexible AC transmission system (FACTS)and mention its objectives? (3)

(b) Explain why TCR is preferred over TSC when a continuous voltage control of a lensis required? (3)

(c) Explain the need of filters in thyristor based compensators. (3)

(d) Draw Elementary circuit diagram of TSC and explain the purpose of reactor used. (3)

(e) Draw the V -I operating curve of TCR. (3)(f) Why it is not possible to achieve simultaneously both unity p.f and zero voltage

regulation. (3)

(g) What do you understand by comensation of lines? (3)

(h) Discuss the reactive power requirement for power transmission line when- (4)

(i) Line loading is greater than SIL (ii)Line loading is less than SIL

UNIT-I

(a) With relevant derivation and diagram, show that the line length and p.f. affects the

voltage and p.f. of uncompensated line under load. (6.5)

(b) Derive that the system voltage is a function of reactive power. (6)

(a) Explain and draw the voltage and current profile for uncompensated transmission

lines under no load conditions. (6.5)

(b) Explain the reasons for variation of voltage in power system and suggest different

methods to control the voltage profile. (6)

Q4

UNIT-II

(a) Explain the series and shunt compensation of line and discuss their effect on the

surge impedance loading of the line if the shunt compensation is 100%. What

happens to SIL and voltage profile? (6.5)

(b) Compare passive and active compensator with suitable examples. (6)

(6)

Q5 (a) Explain with neat diagram the operation of basic TCR and its control law with

relevant derivation. (6.5)(b) By combining the effects of series and shunt compensation, show that

. ~I-Ksc(i) 20 =20

1- KSH

Q6

Q7

Q8

Q9

UNIT-III

(a) From the hydropower plant of 9000MW is to be transmitted to a load centre located

500Km from the plant based on practical line loadability criterion. Determine the

no. of 3~, 60hz lines required to transmit the power for the following cases:- (6.5)

(i)345KV lines with Zc=297 ohm (ii)765KV lines with Zc=266 ohm

Assume Vs=lpu, Vr=0.95p.u. and 8= 35and assume that the lines areuncompensated and widely separated such that there is negligible mutual coupling

between them.

(b) Discuss the benefits of Reactive power dispatching strategy to improve power

system operation. (6)

(al A manufacturing plant uses 100KVA at 0.6pf lagging under normal operation. A

synchronous condenser is added to the system to improve the overall pf. The power

required by synchronous condenser is lOKW. Determine the overall pf when

synchronous condenser is operating at 0.5pf leading. What must be the pf of the

synchronous condenser to improve the overall pf to 0.9 lagging? (6.5)

(b) Discuss various mathematical modeling tools for reactive power management. (6)

UNIT-IV

(a) Explain the operation of unified power flow controller with suitable diagram.

Discuss its functional capabilities. (6.5)

(b) Discuss loadability characteristics of overhead transmission line. (6)

(a) Discuss in detail the operation of IPFC and its importance. (6.5)

(b) Explain the phenomenon of sub-synchronous resonance and suggest the measures

to control this problem. (6)************

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