... three-phase system are only half those of
the three separate single-phase systems, and the line-voltage drop between the
source and load in the three-phase system is half that of each single-phase
system. ... (Transient Stability), and
Chapter 12 (Power System Controls) for this edition of the text. He also pro-
vided the examples and problems using PowerWorld Simulator as well as
three design projects. ... maintaining system standards and reliability.
NERC coordinates its eÔorts with FERC and other organizations such as the
Edison Electric Institute (EEI) [10].
As shown in Figure 1.3, the transmission system...
... obtainingatimeresponse,andROOTLforobtainingroot-locusdataand
plots.TheseCADpackagesbecamethebasisforthepracticalcontrol
systemdesignCADpackagecalledTOTAL,theforerunnerofTOTAL-PC
[8],whichwasdevelopedin1978atAFIT.TOTALbecamethecatalyst,
alongwithothercontrolCADpackagesdevelopedbyotherindividuals,
forthedevelopmentofthecurrenthighlydevelopedcommercialcontrol
systemdesignCADpackagesthatarenowreadilyavailable.Oneofthese
CADpackagesisMATLAB,whichhasbecomeavaluabletoolforacontrol
engineerandisillustratedinthistext.ThedetailedcontentsoftheTOTAL-
PCCADpackagearedescribedinAppendixD.Theprogramiscontainedin
thediskwhichisincludedwiththisbook.
Becomingproficient(computerliterate)intheuseoftheseCAD
packages(tools)isessentialforacontrolsystemsengineer.Itisalsoessential
todevelopproceduresforcheckingtheCADresultsateachstageofthe
analysisanddesign.ThisisnecessaryinordertoverifythattheseCADtools
havegeneratedresultswhichareconsistentwiththeory.Wheneverindoubt,
concerningtheoperationofaspecificCADtool,applytheCADtooltoa
simpleproblemwhoseknownanalyticalsolutioncanbereadilycomparedto
thecomputergeneratedoutput.
1.9OUTLINEOFTEXT
Thetextisessentiallydividedintothreeparts.Thefirstpart,consistingof
Chapters2through4,providesthemathematicalfoundationformodeling
physicalsystemsandobtainingtimesolutionsusingclassicalorLaplace
transformmethods.ThesecondpartconsistsofChapters5through9that
providethefundamentalsofconventionalcontroltheoryandstate-variable
concepts.Theremainingportionofthetextrepresentsmaterialthatisusually
coveredinthefirstorsecondundergraduatecourseincontroltheoryand
controlsystemdesign.
Thefirstfewchaptersdealwiththemathematicsandphysicalsystem
modelingthatunderlietheanalysisofcontrolsystems.Oncethetechniqueof
writingthesystemequations (and, inturn,theirLaplacetransforms)that
describetheperformanceofadynamicsystemhasbeenmastered,theideas
ofblockandsimulationdiagramsandtransferfunctionsaredeveloped.
Whenphysicalsystemsaredescribedintermsofblockdiagramsandtransfer
functions,theyexhibitbasicservocharacteristics.Thesecharacteristicsare
describedanddiscussed.Theconceptofstateisintroduced,andthesystem
equationsaredevelopedinthestandardmatrixformat.Thenecessarylinear
algebrarequiredtomanipulatethematrixequationsisincluded.Apresenta-
tionofthevariousmethodsofanalysisisnextpresentedthatcanbeusedinthe
studyoffeedbackcontrolsystems.SISOsystemsareusedinitiallytofacilitate
26Chapter1
Copyright ... designer’s control -system design proficiency, since it minimizes
and expedites the tedious andrepetitive calculations involved inthe design of a
satisfactory control system. To understand and use a computer-aided ... a computer-aided analysis
anddesign package, one must first a chieve a conceptual understanding of the
theory and processes involved in the analysisand synthesis of control systems.
Once the...
... and Design?
System development can generally be thought of having two major components: systems analysis and
systems design. In SystemAnalysis more emphasis is given to understanding the details ... done.
2.2.3. Design of System
After the system has been analyzed by the analyst, the design stage of system life cycle begins. In
design phase, the structure or design for the proposed system is ... between analysisand design? Can one begin to design without analysis?
Why
2.11. Summary of System Development Life Cycle Models
Key points covered in this lesson are
>>The system& apos;s...
...
1
SCHOOL OF INFORMATION AND COMMUNICATION TECHNOLOGY
HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY
______ * ______
SYSTEM ANALYSISANDDESIGN
REPORT
Author :
... Conceptual data modeling ………………………………………… 17
B. Design
I. High-level Design
1. Scenario Analysis …………… 18
2. Object Analysis ……………………………………………… 22
3. Screen Design
3.1 Log on ……………………………………………… 24 ...
B. Design
I. High – level Design
1. Scenario analysis.
1.1. User log on
27
Citizen User Menu Screen
Screen Layout
System name
S City Library
System...
... businesses plateau or decline.
Case Study: System Telecom 25
5.2.1 Before AnalysisandDesign 108
5.2.2 AnalysisandDesign 110
5.2.3 After Analysisanddesign 112
5.3 Project Planning 113
5.3.1 ... Context for Analysis
and Design
1.1 Introduction
Who is this book written for? The whole book is about systems analysis and
design, and it’s been written for people who are analysts or designers ... external entities and the logical data stores.
System Telecom Board Organisation Chart
Systems Analysisand Design
23.3 Change Management 437
23.3.1 Unfreezing, Moving and Refreezing 438
23.4...
... relationship among specialized analysis tools,
Arthur M. Langer
Analysis and Design
of Information
Systems
Third Edition
16 AnalysisandDesign of Information Systems
System Boundaries. This provides ... requirements to system requirements
5. Design the database and accompanying applications
6. Build, test, and implement the database and applications
20 AnalysisandDesign of Information Systems
Transition ... design of the program structure,
Requirement
Application
Design
Database
Design
Network
Design
Outline
System
Design
Audit
& Control
Design
Back-up
& Recovery
Design
Transition
Design
System
Test
Plan
Final...
... finite
length design by properly addressing the rate splitting issue,
and finally, conclusions and perspectives are drawn in
Section 5.
2. System Description and Notations
2.1. Definitions and Notations. ... University, November 2002.
2 EURASIP Journal on Wireless Communications and Networking
analysis and the design remain fully analytical and linear
in the parameters, that is fountain distributions are ... and to finite length design. In the next
section, we draw the density evolution analysis under Gaus-
sian approximation, and show the advantages of considering
a joint decoder.
3. Asymptotic Analysis...
... primarily
synchronization and channel estimation for
PLC and xDSL systems, and performance analysis of wireless
MIMO systems.
Francisco Javier Ca
˜
nete received the M.S.
and Ph.D. degrees in telecommunication
engineering ... theory and numerical methods for
characterization,” IEEE Transactions on Circuits and Systems I:
Fundamental Theory and Applications, vol. 47, no. 5, pp. 655–
674, 2000.
[15] E. A. Lee and D. ... 3rd edition, 2005.
[13] IEEE 1139-1999, “Standard Definitions of Physical Quantities
for Fundamental Frequency and Time Metrology-Random In-
stabilities,” IEEE 1999.
[14] A. Demir, A. Mehrotra, and...
... transformation and inverse transformation to convert
between “frequency” and “time”.
b. Spectral leakage and aliasing.
c. Smoothing and windowing operations in time and frequency.
d. Time and frequency ... and also their computed results, can be named and stored in a
special hard disk folder.
The DFT and IDFT, and especially the FFT and IFFT, are not only very
fast but also very easy to learn and ... operations.
e. Power spectrum and cross-spectrum.
f. Multiplication and convolution using the DFT and IDFT.
g. Relationship between convolution and multiplication.
h. Autocorrelation and cross-correlation.
i....
... negative frequencies. The value at
12 DISCRETE-SIGNAL ANALYSISAND DESIGN
identiịed in both time and amplitude. If the sequence is nonrepeating
(random), or if it is inịnite in length, or if it is ... N /2, is labeled both as + 4and 4. This
location is special and will be important in later work. In computerized
waveform analysisand design, it is a good practice to use n =0asa
starting point ... consisting of positive-
and negative-frequency harmonics, to be discussed in detail later. For
example, if Fig. 1-1c and d are frequency values X (k ), then −4to−1in
Fig. 1-1c and +4to+7 in Fig. 1-1d...
... same operation
72 DISCRETE-SIGNAL ANALYSISAND DESIGN
Hann: X
3
(k) =
1
N
N1
n=0
1
2
1
cos
2
n
N 1
ì
exp
j2
n
N
(38.0 −k)
The two-sided baseband signal is translated up to a center ... center frequency of
+38.0, where it shows up as a lower sideband and an upper sideband. The
way that the Hamming dominates from 38.0 to 41.0 and the Hanning takes
over starting at 42 is quite noticeable. ... 74 DISCRETE-SIGNAL ANALYSISAND DESIGN
33 34 35 36 37 38 39 40 41 42 43 44 45
−50
−40
−30
−20
−10
0
10
k
(a)
(b)
dB
Rectangular
Hamming
Hanning
33...
... 148 DISCRETE-SIGNAL ANALYSISAND DESIGN
The following brief discussion provides some examples regarding the
usage of the Hilbert transform and its mathematical equivalent in radio
equipment. ... 90°
(b)
(e)
(d )
(c)
(a)
−90°
Figure 8-7 SSB generator using the phasing method.
150 DISCRETE-SIGNAL ANALYSISAND DESIGN
IF Ou
t
L.O.
AF In
DSBSC mixer
Mechanical
or
Crystal Filter
IF freq
Figure 8-8 SSB ... divides four times the desired L.O. frequency by four and
also provides two quadrature outputs, I
LO
and Q
LO
, is frequently used
[Sabin and Schoenike, 1998, Chap. 4], especially when the L.O....