Table Of Content

Matlab - Modelling, Programming and Simulations edited by Emilson Pereira Leite SCIYO Matlab - Modelling, Programming and Simulations Edited by Emilson Pereira Leite Published by Sciyo Janeza Trdine 9, 51000 Rijeka, Croatia Copyright © 2010 Sciyo All chapters are Open Access articles distributed under the Creative Commons Non Commercial Share Alike Attribution 3.0 license, which permits to copy, distribute, transmit, and adapt the work in any medium, so long as the original work is properly cited. After this work has been published by Sciyo, authors have the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work. Any republication, referencing or personal use of the work must explicitly identify the original source. Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published articles. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained in the book. Publishing Process Manager Iva Lipovic Technical Editor Martina Peric Cover Designer Martina Sirotic Image Copyright Yellowj, 2010. Used under license from Shutterstock.com MATLAB® (Matlab logo and Simulink) is a registered trade mark of The MathWorks, Inc. First published September 2010 Printed in India A free online edition of this book is available at www.sciyo.com Additional hard copies can be obtained from [email protected] Matlab - Modelling, Programming and Simulations, Edited by Emilson Pereira Leite p. cm. ISBN 978-953-307-125-1 SCIYO.COM free online editions of Sciyo Books, Journals and Videos can WHERE KNOWLEDGE IS FREE be found at www.sciyo.com Contents Preface VII Chapter 1 Tips and tricks for programming in Matlab 1 Karel Perutka Chapter 2 Using MATLAB to develop standalone graphical user interface (GUI) software packages for educational purposes 17 A. B. M. Nasiruzzaman Chapter 3 Teaching practical engineering for freshman students using the RWTH – Mindstorms NXT toolbox for MATLAB 41 Alexander Behrens, Linus Atorf and Til Aach Chapter 4 A student friendly toolbox for power system analysis using MATLAB 67 A. B. M. Nasiruzzaman Chapter 5 A Matlab® interactive tool for computer aided control systems design in frequency domain: FRTool 87 Robin De Keyser and Clara Ionescu Chapter 6 MATLAB – based software for modeling and studying grid – tied photovoltaic systems 99 Ali Assi and Mohammed Abdi Jama Chapter 7 Modelling of DC-DC converters 125 Ovidiu Aurel Pop and Serban Lungu Chapter 8 Matlab simulations for power factor correction of switching power 151 Ren Kaichun, He Chunhan, Su Dan, Wang Yongli, Zhang Xingqi, Liu Xiaojun, Gong Lihong, Zhao Ying and Liu Peng Chapter 9 Simulation of numerical distance relays 171 Dr. Hamid H Sherwali and Eng. Abdlmnam A. Abdlrahem Chapter 10 Evaluation of the Delta-Sigma modulator coefficients by MATLAB parallel processing 193 Michal Pavlik, Martin Magat, Lukas Fujcik and Jiri Haze VI Chapter 11 A Matlab/Simulink Framework for PLC Controlled Processes 211 João Martins, Celson Lima, Herminio Martínez and Antoni Grau Chapter 12 Optimization and Scheduling Toolbox 239 Michal Kutil, Přemysl Šůcha, Roman Čapek and Zdeněk Hanzálek Chapter 13 Designing antenna arrays using signal processing, image processing and optimization toolboxes of MATLAB 261 Joseph Sahaya Kulandai Raj and Joerg Schoebel Chapter 14 Analysis, model parameter extraction and optimization of planar inductors using MATLAB 277 Elissaveta Gadjeva, Vladislav Durev and Marin Hristov Chapter 15 Modelling and simulation of processes from an iron ore sintering plants 301 Corina Maria Diniş Chapter 16 Fired process heaters 327 Hassan Al-Haj Ibrahim Chapter 17 Finite difference solutions of MFM square duct flow with heat transfer using MatLab program 365 Mohammed Al-Khawaja and Mohamed Selmi Chapter 18 Toolbox for GPS-based attitude determination: An implementation aspect 389 Zhen Dai, Stefan Knedlik and Otmar Loffeld Chapter 19 Seismic model-based inversion using Matlab 405 Emilson Pereira Leite Chapter 20 Computational and mathematical methods in portfolio insurance - A MATLAB-based approach 413 Vasilios N. Katsikis Preface During the last decade the use of MATLAB® has been consistently increasing in scientific academic institutions as well as in several branches of industry that deal with topics ranging from economics to spacecraft orbit simulations. This software package has been proved to be very efficient and robust for numerical data analysis, modelling, programming, simulation and computer graphic visualization. This book is a collection of 20 excellent works presenting different applications of several MATLAB® tools that can be used for educational, scientific and engineering purposes. Most of the authors have been working with MATLAB® for several years and are recognized experts in their fields. Chapters include tips and tricks for programming and developing Graphical User Interfaces (GUIs), power system analysis, control systems design, system modelling and simulations, parallel processing, optimization, signal and image processing, finite different solutions, geosciences and portfolio insurance. Thus, readers from a range of professional fields can benefit from the content of this book. I would like to thank the authors for spending a significant part of their time and efforts to complete each chapter, providing high-quality information for world-wide readers. Also, I must say that the very well organized Sciyo on-line system had significantly facilitated making chapter revisions and organizing them, as well as keeping track of deadlines, in order to have this book developed in the most timely and efficient way. Therefore, I thank the Sciyo team, including the Editorial board, for their support and for accelerating the whole process of writing of this book. Editor Emilson Pereira Leite Institute of Geosciences – University of Campinas Brazil Tips and tricks for programming in Matlab 1 Tips and tricks for programming in Matlab 1 X Karel Perutka Tips and tricks for programming in Matlab Karel Perutka Tomas Bata University in Zlin, Faculty of Applied Informatics Czech Republic, European Union 1. Introduction Matlab is the software developed by the MathWorks, Inc., Natick, USA. In 1984, the first version appeared. Software was primarily used only for the mathematical computation enabling the computation of complicated matrix equations and their systems. All major functions can directly use the matrix as the input. From that year, the software is still under development enlarging the area of the users every year. Matlab became the standard in the area of simulation and modelling and it is used by the researchers and students at universities mainly in the areas of Control Engineering, Power Plant Systems, Aerospace, Bioinformatics, Economics and Statistics. In comparison to other software such as Mathematica or Maple, Matlab has several advantages. Let us mention some. Its open architecture enables sharing all source code among the user community and several different areas are solved and the solution appears usually as a new toolbox. Simulink is the important Matlab enlargement which simplifies the computation very much. You just drag and drop the blocks to the new window from the block libraries and connect them and run the model. Matlab is used not only at universities but also in practice, for instance by NASA or General Motors. Most Matlab users are from the major world countries, such as USA, Japan, China, and India. Nice book was written by Hanselman and Littlefield (Hanselman and Littlefield, 2005). And interesting paper about teaching using Matlab was written by Perutka and Heczko (Perutka & Heczko, 2007). This chapter provides some chosen tips and tricks to the beginners in Matlab programming and should ease the first steps in programming. These tips and tricks are based on the experience of chapter author with teaching Matlab programming in the undergraduate curriculum for several years. The author mostly worked in MATLAB version 6.5, for which tips are. They are unsorted and each chapter provides one tip or trick only. 2. Placing picture as dialog background Being bored from standard look of GUI created in Matlab? If you create dialog in Matlab using GUIDE or set of functions , , and , the dialog figure uimenu uicontrol axes background is usually based on the settings of the system, for example in older Microsoft Windows it was grey – Windows Classic Theme. However, if you need to have your picture as the figure background, there is possible to use the following solution. Such example is 2 Matlab - Modelling, Programming and Simulations shown in figure 1. The dialog in this figure contains only 3 grey pushbuttons ( This code should be placed in the file where the figure is defined. The line 1 of the code is online , , ) and background picture. responsible of loading the picture in the Matlab Workspace using the function . In ident. Gr >> image What to do first? You have to draw the picture in the extern software, for example in Corel this case, STCssu.jpg is the name of picture file and the picture is loaded to the STCssu DRAW! and save it in one of the formats that Matlab supports, for instance as JPG or BMP. variable. Line 2 creates the axes with their range just for all dialog area. Command in line 3 You can get the list of supported formats from the Matlab Help Dialog. Don’t forget to write draws the image from the STCssu variable to the axes created by line 2. The axes description down the width and height of the picture or their ratio. Create new dialog using the is hidden by the command on line 4. If you don’t re-draw the dialog, you can delete the command or by GUI. Set the size of the new window in accordance with the picture variable from the Matlab Workspace, as it is shown in line 5. But if you re-call the dialog, figure width and height or their ratio. How? If you working with GUIDE, double-click the window don’t use line 5. For the dialog re-calling, lines 2 to 4 are enough. in GUIDE and Property Inspector should appear. Change the Units property on Pixels and after that change in the Position property the third and fourth value to the width and height 3. Short online help for every object in dialog of the figure or keep these values in the ratio of the picture you would like to show. If you created the dialog using figure function in M-file, include in the list of properties Units Imagine the situation depicted in figure 2. There is a short text “If you click this button, you and Position and set them in similar way as was described for the GUI created by GUIDE. will open the dialog of setting the controller parameters.” in the box. This text is shown if Now you need to load the figure in the Matlab Workspace, create axes and put the figure you keep the cursor on the button Gr for a while. This might be useful especially in the case inside them. This tip is based on work of Perutka (Perutka, 2007). Inspire yourself by the of two sorts of objects in dialog (button or edit text) to provide necessary short information following code which will be commented what should be written as the text (edit text) or what will happen when the button is pressed. But short information can be displayed over every object in dialog which has the 1 STCssu=imread('STCssu.jpg','jpg'); property TooltipString. 2 axes('Position',[0 0 1 1]); If you created your dialog by GUIDE, open it in GUIDE again and double click the object for 3 image(STCssu); which you would like to create the short help. 4 axis off; 5 clear STCssu Fig. 2. Dialog with short help Fig. 1. Dialog with picture as its background