البحث — المستودع الرقمي العراقي

المستخلص: المحـــــــــــول الخافـــــــــض للــــــــــــفولتيـــــــــة المستمرة ذو المكثف المفـــــــتاحــــــــي (Switched Capacitor DC - DC Converter ) يمكن ان يستعمل للتحويل الكفوء للطاقة حيث نجد انه عندما لا تستعمل المحاثات في دوائر التحويل يؤدي الى خفض حجم | Switched - capacitor (SC) - based step - down DC - DC converter can be used for efficient power conversion when inductors are not used in order to reduce size and cost. In addition, switched - capacitor DC - DC converters are superior to inductor - based converters for high - conversion ratio and wide range of load variation. In this thesis , a multistage current - controlled switched - capacitor step - down DC - DC converter is analyzed , designed and simulated. The converter features are of good regulation capability and continuous input current waveform when two step - down converter cells are connected in parallel and operate in antiphase. Classical SC converter with pulse width modulation technique is also analyzed, designed , simulated. For the PWM converter and current - controlled converter , third - order state - space averaging technique is used for analysis. A fuzzy logic controller is used with the current - controlled converter to obtain fast dynamic response, low ripple in the output voltage and robustness against load and supply variations. A 70W ,48/12V and 12.5W 48/5V converters are designed and simulated ( Matlab/Simulink is used for simulation). The simulation results are obtained and compared for the above converters with different control techniques (PWM ,current control with PI controller and current control with fuzzy controller). The results for current - controlled converters with fuzzy controller show higher efficiency , lower ripples in the output voltage ,fast transient response, good disturbance rejection and very small steady state error of output voltage. In this thesis the value of the output ripple must less than 0.05 V and the efficiency should be more than 75 % for current control mode

نظام الاخفاء الصوري المعتمد على تحويل المويجة والاشارات الفوضوية

اسم المؤلف: سرى فهمي يوسف

اسم المشرف: حكمت نجم عبد الله

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: الجامعة المستنصرية - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

ترميز القناة المرتكز على الاشارات الفوضوية == Chaos Based Channel Coding

اسم المؤلف: سراب كمال محمود

اسم المشرف: حكمت نجم عبد الله

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: الجامعة المستنصرية - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

تقييم اداء نظام الاتصالات المتعدد المستخدمين المرتكز على متجهات فوضوية متعامدة == Performance Evaluation Of Multiuser Communication System Based On Orthogonal Chaotic Vectors

اسم المؤلف: بسمة نزار ناظم

اسم المشرف: ماهر خضير محمود

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: الجامعة المستنصرية - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: In DS - CDMA systems, the use of orthogonal spreading codes with low cross - correlation values is needed to suppress the effect of multiple access interference (MAI) which increases as the number of active users in system is increased.Currently, the conventional PN sequences, such as (Gold codes, Kasami codes …etc.), generated by linear feedback shift registers (LFSRs) and orthogonal variable spreading factor (OVSF) were used as spreading codes in DS - CDMA system. Using these sequences, it is not possible to increase the number of active users in the system due to the fact that the possible sequences generated in conventional PN - system are limited in number and offer mutual interference as the number of active users is increased due to its non - zero cross - correlation values. The chaotic system can be used to generate very large number of quasi - orthogonal sequences compared with the number of PN sequences due to its sensitivity to initial conditions. Another type of chaotic sequences with zero values of cross - correlation called Orthogonal Chaotic Vectors (OCVs) is generated using chaotic systems and the basic idea of Gram - Schmidt ortho - normalization process.In this work, the use of OCVs in synchronous DS - CDMA system for transmission of data over (AWGN, Flat fading and Frequency selective channels) is introduced. The simulation results show that the DS - CDMA based on OCVs gives better BER performance when spread factor ? is greater than the number of active users due to the reduction of MAI between active users.Results show also that, at BER = - in AWGN channel and for 5 users, there are gain of (0.3, 1.2, 1.75 and 3.75) dB between system based on OCVs and systems based on small set Kasami sequence, Gold codes, large set of Kasami sequence and Non - OCVs respectively. Under the effect of flat fading channel, it can be noted that at BER = - and for 30 user, there is 1.7 dB gain between system based on OCVs and system based on small set of Kasami sequences, and this gain increases to 2 dB for 50 user.Under time invariant frequency selective fading channel and for 8 users at BER= - there is about 6dB gain between the system based on OCVs and system based on Non - OCVs.

تصميم وتنفيذ منظومة تعقب شمسي مستقلة معتمدة على نظام تحديد المواقع العالمي == Design And Implementation of A GPS Based Stand - Alone Solar Tracking System

اسم المؤلف: احمد جبار عبد

اسم المشرف: Fawzi M. Al | Naima

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: دكتوراه

الجامعة: جامعة البصرة

اللغة: الانكليزية

مكان الجامعة: البصرة

الصفحات الاولى:

المستخلص: In a step to overcome the limitations of sensor based solar tracking system, a design tracking strategy, is presented in this thesis which is based on astronomical equations. This strategy takes two important factors into consideration. The first is finding the more accurate equations and figure out the ability of implementing such system which can deal with these complicated equations that are based mainly on trigonometric functions. The second is how to design and build a reliable, uninterrupted, accurate and global system that is able to calculate the local time, date and location in terms of longitude and latitude.This thesis aims to design and implement practically a global dual axis solar tracker that can process the data with high efficiency, able to solve these complicated equations, gather the required data from the GPS card, then save, and manage them inaccurate with tracking efficiency up to 99.33%, increases the power production by over 40%, reduce the drive power requirement 31%, reliable and uninterrupted with real time controller.The system also presents a design for a hybrid network for a solar tracking farm consisting of N - solar tracking systems. A main control unit is presented to manage all the trackers to the sun location in multi - tracking mode, diagnosis all the trackers for any faults and give complete information about the produced power from each of the solar tracking system. A new network protocol is designed to deal with the error control, congestion control and flow control for data transmission in the network.A complete solution for power - line communication modem has been proposed based on existing power line characteristics. This modem has advantages of simplicity, cost effectiveness and using new strategy to control the out of reach devices without increasing the transmitting power or changing the circuit specifications. The proposed design offers a simple solution to control the solar trackers in a vast solar farm, enabling to monitor the supplied power by each single tracker in the field and having the ability of fault diagnosis.

تحسين التمييز للشبكات العصبية المنعدمة الاوزان == Recognition Enhancement of Weightless Neural Network

اسم المؤلف: عمار علي مصطفى

اسم المشرف: محمود حمزة المفرجي

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

تصميم وتنفيذ مختبر عن بعد باستخدام الانترنت == Design And Implementaion of Remote Laboratory Using The Internet

اسم المؤلف: ايلاف صباح عبد العزيز

اسم المشرف: Ali F. Marhoon

الموضوع العام: هندسة السيطرة والنظم

السنة: 2014

الموضوع الدقيق: هندسة السيطرة والنظم

الدرجة: ماجستير

الجامعة: جامعة البصرة - كلية الهندسة

اللغة: الانكليزية

مكان الجامعة: البصرة

الصفحات الاولى:

المستخلص: Engineering field had always relied on experiments as backbone to profound the student’s knowledge. The apparatus used in any laboratory considered as one of the major expense in the laboratory structure. The simulation or the virtual laboratory became an integral part to the traditional laboratories where it had deepened the theoretical aspect. Simulated experiment delivered an accurate result based on calculation regardless the real time errors or the environment factors. A new solution had been proposed and titled as “online Lab”, where the students will have the opportunity to work in their own space, to practice at anytime and anywhere.The proposed remote laboratory relied on Client - server model; where the server represents the laboratory side and the client represents the user which had been divided into three types of users : administrator, instructor and student. The proposed experiment based on fuzzy controller which controls the temperature of a thermoelectric device. It will be built by the student throughout an interface provided as a web page and all it takes from the user to conduct the experiment is to have a web browser and an internet connection.The experiment’s operation based on three devices : DAQ, thermoelectric cooler and a device to turn the thermoelectric off. Elements such as sensors, voltage regulator, and resistors had been involved in the circuit to control the temperature of the thermoelectric cooler. The hardware part had been designed to be controlled by the software, which had been built with seven languages and connected to a database. The server side had been built with PHP, which is a free programming language works on different servers but had been combined in this work with Apache HTTP Server to deliver a compound system that run on different operating systems. The client programming languages started with HTML to build forms and the basic design, CSS for advanced design, jQuery which is a library of Java Script that had been used for animation tools and automatic updates, finally SVG had been quite helpful for inventing a method of drawing arrows for the membership functions to have a clear vision to the internal mechanism of the controller. The last two programming languages represented by VB.NET and C# where these languages designed as console applications running in the server side to control the connected apparatus. A camera and a modem had been attached to the server, where the camera provides a live video streaming to monitor the apparatus status and the modem used as precaution solution, since the system may face a malfunctioning. A message will be sent to the administrator to warn him and the administrator may as well send a message and direct the system to appropriate response.

تحسين الفولتية وتقليل خسائر منظومة الشبكة العراقية باستخدام افضل جهاز FACTs == Improvement of Voltage Profile And Reduce Iraqi Grid System Losses By Using Optimal FACTs Device

اسم المؤلف: سيف اسعد عبد الحسين

اسم المشرف: رشيد حميد الربيعي | انعام ابراهيم علي

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: الغرض من هذا العمل هو تحسين الجهد والتقليل من خسائرالقدرة للشبكة العراقية ( 400kV ) عن طريق تركيب اجهزة ( FACTs ) في مواقع مختلفة تحت حالة خطا ومقارنة النتائج مع تلك دون وجود (FACTs) تحت نفس الظروف.تم تحديد الموقع الامثل للـ(FACTs) على اساس الخوارزميات | The aim of this work is to improve the voltage profile and reduces power losses of Iraqi (400kV) power grid system by installing Flexible Alternating Current Transmission System devices (FACTs).The optimal location of the FACTs device was specified based on Genetic Algorithm (GA) optimization method and power system analysis toolbox ( PSAT) package, it was utilized to search for optimum FACT parameters setting and location based objective function that depends on the power and voltage as fitness.MATLAB (R2011a) was used for running both GA program and Power System Analysis Toolbox (PSAT) version 2.1.6, Newton Raphson method also used for solving the load flow of the system and the Trapezoidal method for the non - linear differential equations.Two systems have been implemented in this work as follows; • IEEE - machine 9 - bus system.• INSGS 11 - machine 24 - bus, 39(400kV) overhead transmission line.The GA program is implemented on IEEE 9 - bus system, then after getting the appropriate results the same procedure repeated for the Iraqi grid system which is more complicated, its used to find the optimal location of Unified Power Flow Controller (UPFC). The results obtained from GA have been compared with PSAT and showed that the installation of (UPFC) devices at the optimal locations of the Iraqi grid gives an improvement in the power losses and voltage after subjected to the three phase fault to ground at different locations and different cases (temporary fault, permanent fault).

نموذج مقترح للتعامل مع فشل العقدة في شبكة الاستشعار اللاسلكية == Proposed Model To Handle Node Failure In Wireless Sensor Network

اسم المؤلف: مصطفى خالد مزعل

اسم المشرف: ضياء جاسم كاظم

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: Wireless Sensor Network (WSN) contains many low cost and low power sensor nodes (SNs), these nodes may fail to communicate with each other according to some reasons such as battery lifetime, uncontrolled events or any surrounding environment actions which will lead to partition the network and reduce the Quality of Service (QoS) as well as the reliability and efficiency of the whole network. The motivation of this work was detecting these malfunctions using three approaches considered with two proposed network models : random distributed SNs and real model.Firstly, localization approach in WSN are discussed and verified using four classic localization methods to detect any failed SN, which are : Distance Vector (DV - Hop), Angle of Arrival (AoA), Time of Arrival (ToA) and Received Signal Strength Indicator (RSSI). These methods are analyzed and implemented for three different areas, each with three different numbers of SNs. All of them are implemented using MATLAB programming language. Secondly a known fault detection method called Distributed Fault Detection (DFD) discussed and implemented using MATLAB also, and a new method developed from this method named (MDFD) to overcome the disadvantages of DFD method. Finally the feature of the connectivity of the SNs themselves within the network is exploited by using two Medium Access Control (MAC) protocol standards : Sleep Medium Access Control (SMAC) and Tune Medium Access Control (TMAC) protocols, then proposed a modified MAC protocol (MMAC) to enhance the most affecting factors of these two MAC standards such as energy consumption and latency. The performance analysis of these three MAC protocols is verified and simulated using a real model for Iraq, Baghdad, Al - Kadhumyah City, by Castalia 3.2 simulator also designed and implemented these three protocols using an iOS application by the XCode program for general application sensors especially for explosives detection sensors, Fido® X3 sensor proposed forthis application. Simulation results showed that the localization methods proved their ability to localize the failed SNs, but with impractical errors (about 23%) in results than the other approaches, and additional load effect on the network due to execute the localization programs separately before each node failure detection. The DFD approach applied with homogeneous WSNs only that contain only one type of sensors, its errors (starting from 25% for three SNs) was due to its algorithm limitations in using only half of the neighbor SNs, reduced in MDFD method algorithm in which all neighbor SNs considered to detect the failed SN reaching full detection accuracy but with latency tradeoff. The MAC approach is better than localization approach because there is no need to additional hardware for node failure detection; it is also better than DFD approach because it was applicable with both homogeneous and nonhomogeneous WSNs. The three MAC protocols succeeded to detect the failed SNs, but SMAC and TMAC had their tradeoff in energy consumption and latency, when SMAC had less energy consumption (69.62% than TMAC), while TMAC had less latency (27.58% than SMAC). MMAC is combining the advantages of both SMAC and TMAC that had a less energy consumption than that in SMAC by 54.16% and smaller latency than that in TMAC by 76.19% within a range of division index m : between 1 to 5.

مقترح بروتوكول توجيه الانترنيت الاشياء بالاعتماد على شبكات الاستشعار اللاسلكية == Proposed Routing Protocol For Internet of Things Based On Wireless Sensor Networks

اسم المؤلف: عمر عبد الستار حماد

اسم المشرف: ضياء جاسم كاظم

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: The routing protocol designed for Internet of Things (IoT) systems has to be adapted with different applications requirements in order to enhance the performance of IoT applications. Therefore, the main objective of this thesis is proposing a routing protocol for wireless sensor network employed to serve IoT systems. A new IoT architecture was proposed with explaining the main functions of each layer forming the proposed architecture. The proposed routing protocol acted according to the tasks specified in this architecture. In addition, an IoT application was proposed to be applicable in some utility organizations. The link quality, node depth and energy were used as metrics to make routing decisions. In this work, different cases were proposed to exhibit the usage of these metrics and show the differences of using each of them, then examine different techniques which deal with link quality and the difference between using node - to - node link quality and end - to - end link quality. Improvements were added to the proposed routing protocol to achieve the perfect integration with suitable Media Access Control (MAC) protocol with taking into consideration the behavior of IoT application. Regarding this orientation, two approaches were suggested; the first includes the proposed routing protocol, application with high data rate and MAC protocol without sleeping capabilities; while the second approach included the proposed routing protocol, application with dynamic data rate and MAC protocol with sleeping capabilities. Comparison with other protocols was essential to show the improvements achieved by this work, thus protocols designed to serve the same purpose such as AODV, REL and LABILE were chosen to compare the proposed routing protocol with. To add integrative and holistic, some of important features such as actuating and mobility were added and tested. These features were greatly required by some of IoT applications and improving the routing protocol to support them made it more suitable for IoT systems. The proposed routing protocol was simulated using Castalia - 3.2 and all proposed approaches were examined to show the enhancement achieved by each approach. The results showed better performance when using end - to - end link quality. The results also showed the effect of MAC protocol if decreasing energy consumption was required. Sleeping MAC was the best choice when used with the proposed routing protocol while reducing the data rate. The proposed routing showed better performance than other protocols did regarding Packet Delivery Ratio (PDR) and latency. It preserved network reliability since it did not generate routing or data packets needlessly. Routing protocol with added features (actuating and mobility) showed good performance. But that performance was affected by increasing the speed of mobile nodes.

تصميم مسيطر وتحليل مولد حثي ثنائي التغذية مع سرعة الرياح المتغيرة == Controller Design And Analysis of Doubly - Fed Induction Generator With Variable Speed Wind

اسم المؤلف: سراج منهل حمید

اسم المشرف: حسین ثاني رشك

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

تصميم ترميز تحويل لوبي في القنوات الاسلكية == Design of Luby Transform Code Over Wireless Channel

اسم المؤلف: نبيل احمد مصدق

اسم المشرف: وائل عبد الحسن هادي

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الاتصالات

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: ترميز التحويل لوبي) هو نوع من الترميز النافوري يعمل بدون اي معلومات عن القناة. في هذا العمل، تم تصميم LT code)) باستخدام ماتلاب، التصميم يتكون من ثلاثة اجزاء ( Encoder ,Decoder, channel ). في الجزء الخاص بتصميم الـ (Channel ) استخدمنا (( flat fading ch | Luby transform code (LT Code) is a type of fountain codes operating without any information about channel. In this work, LT code design of LT code implemented by using Mat lab as simulation software, our design consists of three parts (encoder, channel and decoder). In the channel design, flat fading channel will be used as a noisy channel to measure the performance of LT code over this type of channels. From the result obtained, SNR improvement by (30dB) at (BER=?10?^( - 4)) compared with data effect by the fading channel without coding with BPSK modulation model under different values of degree of distribution (d). Other type of modulation model (QPSK) used to measure the effect of changing the modulation type on the code performance. From the results obtained, SNR improvement by (31dB) at (BER=?10?^( - 4)) compared with data effect by the fading channel without coding. The degree of distribution (d) is a critical point of design, two types of distribution presented in this work, robust soliton distribution (RSD) and ideal soliton distribution (ISD). (ISD) works poorly in practice, (RSD) is a practical way used to get the degree of distribution in design by adding two extra parameters (c and ? ) which provide the spike element (k/R) in high degree distribution to ensure the continued of decoding process. As a result obtained the value of (c) has a major effect on the spike position on high degree (c=0.15,k/R=10 and c=0.2,k/R=7) with selective value of ?=0.5.The successful decoding probability for two types of degree distribution is very important, the value of successful decoding probability for (ISD) for low number of encoding packets (50 - 100) packet is greater than the value of successful decoding probability for (RSD). In the high number of encoding packets (>150) the value of successful decoding probability for (RSD) is greater than the value of successful decoding probability for (ISD).Encoding time for two type of distribution also discussed in this work, based on the results obtained the encoding packets time when using (RSD) is less than the encoding packets time when using (ISD).

تخمين حالة منظومة الشبكة العراقية استنادا الى تقنية امثلية الحشد الجزيئي == Iraqi Super Grid Network State Estimation Using Particle Swarm Optimization (PSO) Techniqu

اسم المؤلف: انمار جاسم حميد

اسم المشرف: افانين انور عبود

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: يعتبر تخمين حالة منظومات القدرة الكهربائية من الامور المهمة في تشغيل منظومات القدرة وخصوصا في حالة الحمل الزائد على شبكة الطاقة الكهربائية من خلال دوره في ضمان تشغيل اكثر اقتصاديا وامانا. تم في هذا العمل دراسة تخمين حالة منظومة القدرة واقتراح طريقة فعا | Due to the increasing stress on power system networks, state estimation recently became a main matter in the operation of power systems through its important role in ensuring the secure and economical operation of the power system. This work presents a study of a problem of power system state estimation, and proposes an efficient and reliable optimization approach to solve the power system state estimation problem. Two programs have been proposed and implemented in order to overcome the disadvantage of the classical optimization problem and search for the optimal solution of state estimation in power systems, the first program is a conventional state estimation program based on Weighted Least Square (WLS) method, and the second program is an intelligent program based on Particle Swarm Optimization (PSO) technique. All programs have been implemented using MATLAB and have been developed to solve the state estimation problem of the Iraqi Super Grid network (400kV). The proposed programs have been examined and tested on the 14 - bus IEEE and 30 - bus IEEE test standard system. The results were compared with those of the previous published papers. Then, the two programs were applied on the Iraqi Super Grid network (400 kV). The tests proved that the two methods are very efficient and suitable for on - line applications since they are concise and require few computations. The results show that the convergence of the (PSO) technique to the optimal solution is more accurate than (WLS) method. On the other hand, the PSO has an acceptable execution time compared with the freezing time of Iraqi Supervisory Control and Data Acquisition (SCADA) system approved by the Iraqi national grid.

تصميم وتنفيذ رادار تضمين التردد ذو الموجة المستمرة لنظام السرعة التكيفي للسيارات == Design And Implementation of Frequency Modulation Continuous Wave Radar For Adaptive Cruise Control of Car Applications

اسم المؤلف: تمارا زهير فاضل

اسم المشرف: منال حمادي جاسم

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: The traffic accidents became significantly obsession and concern for all members of society, and has become one of the most important problems that sap physical, human resources and human potential. The researches show that the damaged property and other costs may equal 3% of world’s gross domestic product, which have been required to work in finding solutions and suggestions and put them into practice to reduce these incidents.The insertion of preventive safety applications into the car system can avoid the above mistakes. In this work, a design and implementation of Frequency Modulation Continuous Wave (FMCW) radar system working at 77GHz for Adaptive Cruise Control (ACC) technology is proposed. Using MATLAB R 2013 which is a flexible system to estimate the speed and distance in accordance to vehicle ahead, which reduces the forces on the rate of accidents by warning the driver when two vehicle become too close.Also, the principle of FMCW radar is presented to generate Linear Frequency Modulated Continuous Wave (LFMCW) sweep waveform through frequency bands with triangular frequency modulation using Voltage Control Oscillator (VCO), a triangle sweep pattern adopt will resolve ambiguity without Doppler processing. which improves the decision making before hardware implementation.Proteus Professional v8 and Micro C PRO v 6.1 compiler is used for Peripheral Interface Controller (PIC) to design a proposed collision warning circuit with PIC16F887 and RS_232 serial port to send data using USART terminal for (short, middle, large) test range.A serial communication interface is used for sending the simulation results from MATLAB FMCW radar system to hardware easy PIC v7 board with PIC16F887 to forward collision warning circuit to alerts the driver of collision risk, Liquid Crystal Display (LCD) shows radar status (short, middle, large) in accordance to range between the vehicle that FMCW radar installed and the vehicle ahead.Graphic Liquid Crystal Display (GLCD) shows the car position and road lines. Piezo Buzzer will start singing to alerts the driver from danger road.The simulation design is achieving the desired performance, one parameter warrants further attention. In the FMCW configuration, the sweep time is about 25 microseconds. Therefore, the system needs to sweep a 140 MHz band within a very short period. Such an automotive radar may able to meet the cost requirement.

تقييم اداء الكشف المباشر والمتشاكه في نظام اتصال الليفة الضوئية == Performance Evaluation of Direct And Coherent Detections In Optical Fiber Communication System

اسم المؤلف: علاء عبد الزهرة جعفر

اسم المشرف: علي يوسف فتاح

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: تطورت خدمات الاتصالات بشكل متسارع في السنوات القليلة الماضية خصوصا في المسافات بعيدة المدى وبمعدل نقل البيانات بدقة عالية وخسائر قليلة في جميع انحاء العالم. وقدمت تقنيات مختلفة لزيادة سعة الارسال في انظمة اتصالات الالياف الضوئية بواسطة جمع مسارات البيانا | In recent years, there has been an extensive development of optical fiber services. They provide transmission over long distances at a high data rate with few losses all over the world. Different techniques have been introduced to increase the transmission capacity of optical fiber communication systems by a multiplexed high data rate stream into an optical fiber such as Dense Wavelength Division Multiplying (DWDM) technique. Since the deployment of DWDM technique, the focus on introducing large system capacity with high system performance, different detection techniques have been introduced to enhance the system performance with high sensitivity. In this work, two types of detection techniques (direct and coherent detection) have been evaluated and compared with each other. These detection techniques have been evaluated based on several models of encoding format such as Return to Zero - Differential Phase Shift Keying (RZ - DPSK) and Non Return to Zero - Differential Phase Shift Keying (NRZ - DPSK) at 10 Gb/s as a data rate.These systems were first simulated with a single channel to analyze the performance with no Stimulated Raman Scattering (SRS), Cross Phase Modulation (XPM) and Four Wave Mixing (FWM) effects. Whereby the system of 8×10 Gb/s is simulated at 200 GHz, 100 GHz and 50 GHz as channel spacing. Three types of dispersion compensation schemes are used in the link channel. These systems are simulated using (Optisystem version 10.0) software package. The performance of the designed systems are evaluated through Q.factor verses input power and Bit Error Rate (BER) verses Signal to Noise Ratio (SNR).The polarization interleaving is used with the WDM systems to decrease the nonlinear effects and the crosstalk arising among the adjacent channels.The obtained results of the 67% RZ - DPSK arrived to the threshold power at input power less than of the 50% RZ - DPSK, as well as the 50% RZ - DPSK system arrived to maximum Q.factor lower than 33% RZ - DPSK. This is due to the pulse duration of 33% RZ - DPSK is smaller than of 50% and 67% RZ - DPSK.The results show that the coherent detection technique has better performance than the direct detection technique. The coherent detection technique has Q.factor equal to 45, while the direct detection has Q.factor equal to 27 at the same input power ( - 5dBm), while the coherent detection technique arrived to the threshold power at the input power less than of the direct detection technique.The BER of the 33% RZ - DPSK with coherent detection with 10 Gb/s at 300 km as transmission distance achieved ?10?^( - 12.9) at SNR of 10 dB, while for the 33% RZ - DPSK with direct detection is achieved a BER of ?10?^( - 8.8) with SNR of 10 dB.The performance of the proposed systems has been improved extrusivly with increase the space channel, where the performance of the systems at 200 MHz as channel spacing has best performance than 50 MHz as channel spacing.By adapting coherent detection with 33% RZ - DPSK technique of 200 MHz as channel spacing, DWDM system can carry high data rate with long - haul transmission distance.

مراقبة انذار المرضى عن بعد الزمن الحقيقي اعتمادا على الصحة الالكترونية الصحة العنكبوتية الصحة الخلوية وشبكات التحسس اللاسلكية حالات الدراسة موضع منام المريض سكر الدم استجابة الجلد الكلفانية والتخطيط العضلي == Remote Patients Monitoring / Alarming In Real Time Based On E - Health / I - Health / GSM - Health And WSN, (Case Study : PP, BG, GSR And EMG

اسم المؤلف: علي جاسم رمضان

اسم المشرف: سمير جاسم محمد | محمود شاكر نصر

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: جامعة بابل - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بابل

الصفحات الاولى:

المستخلص: Patient's health monitoring / diagnosing systems have become the focus of attention of researchers today. At the present time, the researchers are dealing with the E - health fields to develop and improve the healthcare systems and they work to combine the GSM and Internet technologies together.In the presented work, the researcher designed a portable real time wireless medical system for monitoring / diagnosing the patients' status based on E - health / GSM - health / I - health and wireless sensor network (WSN) under ZigBee protocol, and to support alarming and printing of medical reports subsystems.The presented system consists mainly of four subsystems, which are sensing & data transceiver, base station (BS), GSM and Internet. Where sensing & data transceiver subsystems be in the patients' lobbies and connected remotely with the base station (BS) subsystem in the wireless sensor network that collect and display the sensing data in it. Also in the designed system, the GSM and Internet technologies are inserted practically in the network.The implemented system measures the biomedical data utilizing a group of sensors that are not available in the country's hospitals in such integrated system, which are the patient position sensor (PPS), galvanic skin response sensor (GSR), blood glucose sensor (BGS), and electromyography sensor (EMG). Moreover, the system has the ability to add many other sensors.In the proposed system, three nodes (lobbies) are considered according to the facilities available, but it can monitor / diagnose unlimited patients' numbers.The system monitors the sleep position and skin conductance (indicator to patient's calm) of the patients in real time with alarm for each abnormal case in the base station (BS) and in lobbies, and it also follows up the glucose rate in patient's blood and diagnose the electromyography (muscle and nerve) status.The GSM subsystem (GSM - health) is used for remotely following - up the patients' status by sending SMS alarm in time for any abnormal case of the patient's sleep position and skin conductance, also it has ability to send the glucose data to doctor's phone. All these services are performed by using a personal phone device only without using any additional GSM modem or other apparatus, so this method reduces cost, complexity and delay time of the system that's done by interfacing the phone with the PC directly via USB port and the messages sending procedure executed using special SMSs AT commands, so the doctors become able to communicate with BS using SMS or voice calling to give the fast and direct necessary guidance.The Internet subsystem (I - health) is another excellent service for the presented system, by which remotely following - up the glucose levels by uploading the glucose data to a specific web site. It is performed by designing a web site that is programmed using VB.NET and ASP.NET languages. of course, user login feature is added to protect the privacy of patients and feedback comments feature between the doctors and patients to take the important guidance.The system has ability to introduce a printed hard copy report about the patient's electromyography status or result and blood glucose levels, by utilizing VISUAL BASIC program. Moreover, it performs searching process about the active nodes in network, this means that it detects any new node (new patient) and put it in service. In addition, the system records the patient's information and stores his health data for any archiving process or statistical study.The main hardware that is used in the implemented system includes MCUs, sensors and transceivers, and used the LABVIEW program to display the data in its GUI windows in the computer of BS.The system has been implemented practically at low cost and low power, gave expected and accurate results, and presented to the specialists doctors and they have expressed their conviction and effectiveness of the system in practice.

تصميم وبناء هوائي عريضة الشريط باستخدام المواد المسماة مابعد المادة == Design And Implementation of Ultra - Wideband Metamaterial Antenna

اسم المؤلف: مروه مكي حمد

اسم المشرف: طه احمد عليوي | سليمان مرتضى عباس

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

الشبكات المتعلمة الرقمية متعددة الاصناف المحورة لاغراض فحص كريات الدم الحمراء == Modified Multi - Category Digital Learning Network For Red Blood Cell Inspection

اسم المؤلف: سهاد قاسم غلام حسين حداد

اسم المشرف: محمود حمزة المفرجي

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

النظام المتوازي للتعرف على الوجه بالاعتماد على وحدة المعالجة المركزية متعددة النوى ووحدة معالجة الرسومات == Parallelizing Face Identification System Based On Multi - Cores CPU And GPU

اسم المؤلف: زهراء قاسم جابر العبيدي

اسم المشرف: محمد عصام يونس

الموضوع العام: هندسة السيطرة والنظم

السنة: 2014

الموضوع الدقيق: هندسة السيطرة والنظم

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: تمييز وجه الانسان هو احد انماط التعرف وهو واحد من اهم المقاييس الحيوية في الوقت الحاضر. ان الدقة في تحديد النتائج هي ليست المشكلة الرئيسية الوحيدة للتعرف على الاشخاص وانما يعتبر عامل السرعة في اظهار النتائج عاملا ضروريا في كثير من التطبيقات التي لها قيو | Face recognition is a pattern recognition technique and one of the most important biometrics. The accuracy is not a major problem that specifies the performance of automatic face recognition system alone, the time factor is also considered a major factor in real time environments. Motivated by such challenge, this thesis proposes a Real Time Face Identification System (RTFIS). In doing so, this thesis reviews the state - of - the - art of the face recognition systems and the current parallel processing technologies and available tools. Moreover, this thesis provides the architectural design, detailed design, and implementation of the RTFIS. In order to judge the speed up obtained in adopting recent technologies and parallel processing design patterns, this thesis proposes four variants implementations (models) of the RTFIS, the four variants are performed by using Fisherface algorithm for face recognition and Haar - cascade algorithm for face detection, In addition, these implementations are based on industrial standard tools involve Open Computer Vision (OpenCV) version 2.4.8, Microsoft.Net framework 4, C# programming language, EmguCV version windows universal CUDA 2.9.0.1922,and heterogeneous processing units. The first variant is performed using single core CPU (CPU Mono) to run both detection and recognition phases, second variant is performed by employing multi - core CPU (CPU Parallel) to run both detection and recognition phases, third variant is implemented by employing a combination of single core CPU and GPU (Hybrid Mono) to run detection on GPU and recognition on CPU and the fourth variant is implemented by employing the combination of multi - core CPU and GPU (Hybrid Parallel) to run detection on GPU and recognition on CPU. The experiment consists of applying 400 pictures for 40 persons' faces (10 images per a person), defining, training, and recognizing these pictures on these four variants, the experiment is taken place on the same environment. Finally, this thesis determines the speed up obtained for the three advanced implementations (i.e., Hybrid Parallel model, CPU Parallel model, and Hybrid Mono model) against the convention implementation (i.e., CPU Mono model).The practical results demonstrate that the Hybrid Parallel model gain highest speed up around 82X, CPU Parallel model also have a high speed up around 71X, and finally, the Hybrid Mono model gives a slight speed up about 1.04X.

اعادة تشكيل واضافة متسعات في قطاع توزيع كهرباء بغداد == Reconfiguration And Capacitor Placement In A Baghdad Distribution Sector

اسم المؤلف: اديب ناصر حسين

اسم المشرف: ثامر محمد عبد الوهاب

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: يعد تخطيط شبكات التوزيع الكهربائية من الاولويات في الوقت الحاضر في العراق نظرا للزيادة الهائلة في الاحمال الكهربائية والتوسعات المفروضة على الشبكات نتيجة التوسع العمراني الكبير والسريع.يتحقق الاداء الامثل للشبكة بتقليل المفاقيد‘ تحسين الجهد (Voltage pr | Planning of electrical distribution networks is considered of highest priority at the present time in Iraq, due to the huge increase in electrical power demand and expansions imposed on distribution networks as a result of the great and rapid urban development. Optimum performance of the electrical network is achieved by reducing losses, improving voltage profile and alleviating overload for the system components. Such operation provides for energy salvage and redundancy in the electrical network. A planning method is proposed in this work to achieve optimum operating conditions of the network by combining the network reconfiguration in conjunction with the insertion of capacitors of optimal sizing and locations. This method is classified as a huge discrete non - linear optimization problem due to the large number of variables along with the presence of constraints and objectives. The power losses and voltages in buses for all cases are obtained by backward/forward load flow method. The proposed planning of distribution networks is based on the powerful and advanced CYMDist software as a tool for the simulation of distribution networks and performing the required analysis. CYMDist is practical and efficient analysis software, which is used by many electrical companies worldwide as well as the Iraqi ministry of electricity.Optimal network reconfiguration and capacitor placement methods are tested on IEEE 33 - bus and IEEE 34 - bus test systems, respectively. The results show excellent matching as compared with previous work mentioned in the literature.The work is implemented on an actual sector from Baghdad city distribution network, which is Al_Bayaa 11kV, 145 bus, four feeders system. The presented results show that minimum active power losses with improved voltage profile had been achieved. So the network can operate normally without any constraints violation.

تصميم هوائي ضوئي يعمل ضمن نطاق تحت الحمراء الترددي باستخدام تقنية البلازمونك == Optical Antenna Design In Ir Range Using Plasmonic Technology

اسم المؤلف: هادي كريم شمخي

اسم المشرف: محمد ناظم عباس

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: Optical antennas, resonant structures, which efficiently collect free - space light and focus it into a nanoscale volume using plasmonic, are indispensable in the burgeoning field of nanophotonics. In this work, resonance behaviors of the fundamental resonance mode of diabolo gold metal bar optical antennas were investigated. The relationship between the near - field enhancement, absorption, and scattering spectra of localized plasmonic elements was explored. It was found that as the waist of the diabolo gold metal bar optical antenna was reduced, optical energy absorption cross section and near field enhancement at resonance increased significantly. Also reduction of the diabolo waist width caused redshift of the resonant wavelengths in the spectra of absorption cross - section, scattering cross - section, and the near electric field. Oppositely, it was found that as the length of the diabolo gold metal bar optical antenna was reduced, optical energy absorption cross section and near field enhancement at resonance decreases significantly. Also reduction of the diabolo length caused blue - shift of the resonant wavelengths in the spectra of absorption cross - section, scattering cross - section, and the near electric field.Grating surface diabolo antenna design was proposed. It was found that grating superstructure perturbed the optical properties of SPPs (Surface Plasmon polarions) and enabled the control of resonance wavelength of the antenna. The grating reduced the power that flow out from the antenna and enhanced the localized electromagnetic fields intensity. The grating also increased surface plasmon currents because of the formation of bound surface states. As a result, the absorption spectra and near field intensity were enhanced but at the same time, the scattering spectra and the far field pattern were reduced.Titanium - Gold grating surface diabolo antenna was proposed. It was found that titanium metal strengthen the grating perturbation of the optical properties of SPPs and allowed wide range of wavelength shifting (3.5 ?m). Because Gold and Titanium have difference electrical resonance characteristics, less plasmon damping occurred, resulting in lower scattering efficiency and narrower plasmon line widths.Finally, system modelling and simulations is done by using electrical department super computer (24 parallel MP and 64 GB RAM) and COMSOL multiphysics 4.4 software.

تحليل الاضطراب لتوربينة الرياح المربوطة مع منظومة القدرة == Disturbance Analysis of A Wind Turbine Connected With Power System

اسم المؤلف: احمد نجم عبد الامير

اسم المشرف: كنعان علي جلال

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: نظرا لزيادة الطلب على الطاقة في السنوات الاخيرة نتيجة للتوسع السكاني والصناعي ولتقليل التلوث الناتج من الوقود التقليدي والحفاظ على البيئة مما دعت الحاجة الى استخدام مصادر بديلة للطاقة, والتي يجب ان تمتاز بعدة ميزات اهمها انها صديقة للبيئة وغير قابلة للنفا | According to increasing the demand for energy in recent years as a result of the expansion of the population and to reduce pollution from conventional fuels, the need arises to find alternative sources of energy which must be characterized by several features, most important of which is friendly to the environment and sustainable. In this work, the effect of different types of disturbances on the performance of fixed speed of wind turbine generator type Squirrel Cage Induction Generator (SCIG) connected to the power system has been investigated, because it has features which make the best choice in some cases, despite the less efficiency compared with other types of generators. Also, this work aims to study and analysis the effect of (STATCOM) on the wind turbine generators because of its advantages in improving voltage stability of the grid and improving the quality of the productive power. The proposed work is performed using MATLAB/Simulink. The intelligent systems have been used to obtain the best performance in terms of extracting more power from wind energy as well as increase the stability of system in situations of disturbances and the results obtained have been compared with conventional control systems.Three types of controllers are proposed in this work; the first controller is the Proportional - Integral (PI) based on classical trial and error method, the second controller is PI - controller based on Particle Swarm Optimization (PSO) technique for optimal tuning (gain) to improve the performance of the system. The results obtained proved that the PI - controller based on Particle Swarm Optimization (PSO) technique is better than based on trial and error method. The third controller is (Nonlinear Auto regressive - Moving Average) NARMA - L2 based on (PSO). Finally, the results of the proposed controllers show that NARMA - L2 controller is more effective on the stabilization and improves the performance of the system compared with PI - PSO controller

تقييم اداء المسافية بوجود اجهزة FACTS == Distance Protection Performance Evaluation In Presence of Facts Devices

اسم المؤلف: امير عقيل محمد

اسم المشرف: قيس متي الياس

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: With limited enhancement or expansion of the transmission infrastructure, the contemporary power systems are operating under more stressed conditions. It becomes important to fully utilize the existing transmission system to supply load demand as much as possible, thus eliminating or reducing the need for new transmission investment. Flexible AC Transmission System (FACTS) technology provides a method to fully utilize the existing transmission lines as well as new and upgraded lines. However, the implementation of FACTS devices in the transmission system has introduced new power system dynamics that must be addressed in the area of power system protection, such as rapid changes in line impedance, line current and voltage. This thesis reports the results of comprehensive study carried out to explore the impact of mainly two of the FACTS devices, Static Synchronous Compensator 'STATCOM' and Unified Power Flow Controller 'UPFC', on the distance protection relaying system in order to identify important issues that protection engineers need to consider, that is during the stages of design and operation of the protection system. Simulation studies are carried out using MATLAB/SIMULINK. First, the distance relay has been modeled and validated with FACTS device models using test systems from literature. Then the distance relay performance is analyzed and evaluated for various fault and loading conditions in the presence of FACTS devices. A comprehensive study and results for one of the Iraqi 400kV transmission lines (KDS4 - NSRP transmission line) are presented and useful recommendations can be presented to the General Directorate of electrical Power Transmission for Middle Euphrates region / Iraqi Ministry of Electricity. II Abstract Generally, the results show that the apparent impedance seen by the distance relay would be different from that of the system without FACTS devices. Due to this, the distance relay may malfunction, resulting in undependable operation of the power system protection during faults. Furthermore, the results show clearly the dependency of the distance relay operation on many design and operational factors. These include the FACTS device type and its use purpose, the FACTS device connection point or location, the fault type and fault point location along the line, the power flow,...etc.