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تقليل تموج عزم الدوران في طريقة السيطرة المباشرة لعزم الدوران للمحركات الحثية == Torque Ripple Reduction Based Direct Torque Control For Induction Motor Drives

Author name: حيدر سالم حميد
Supervisor name: Prof. Dr. J.H. Alwash | Hanan M. Habbi
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University of Baghdad - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: التحكم المباشر لعزم الدوران هو اسلوب التحكم المستخدم في انظمة محرك التيار المتناوب للحصول على سيطرة عزم دوران عالية الاداء. محرك DTC التقليدية يحتوي على زوج من الـ ( hysteresis comparators)، حساب الفيض وعزم الدوران وجدول اختيارالـ ( voltage vector). يت | Direct Torque Control (DTC) is a control technique used in AC drive systems to obtain high performance torque control. The conventional DTC drive contains a pair of hysteresis comparators, a flux and torque estimator and a voltage vector selection table. The torque and flux are controlled simultaneously by applying suitable voltage vectors, and by limiting these quantities within their hysteresis bands, de - coupled control of torque and flux can be achieved. Conventional DTC drives utilizing hysteresis comparators suffer from high torque ripple and variable switching frequency. Several techniques have been developed to improve the torque performance. In this thesis, Proportional - Integral (PI) controller has been presented to improve the system performance which gives better torque and flux response and also reduces the undesirable torque ripple. The most common solution to high torque ripple and variable switching frequency is to use the space vector pulse width modulation (SV - PWM) that depends on the reference torque and flux. The reference voltage vector is then realized by using a voltage vector modulator.The conventional DTC and DTC with PI controller are implemented using Xilinx System Generator (XSG) for MATLAB/Simulink environment through Xilinx blocksets. The design was achieved in VHDL, based on a MATLAB/Simulink simulation model. The Hardware - in - the - Loop (HIL) method is used to verify the functionality of the Xilinx FPGA estimator. The results are obtained and compared with MATLAB/ Simulink results considering the implementation of the proposed model on the Xilinx NEXYS2 Spartan 3E1200 FG320 Kit. The simulations of the DTC - SVPWM were carried out using MATLAB/ Simulink simulation package. The design, implementation and simulation of the overall drive system is performed using MATLAB/Simulink program version 7.13.0.564 (R2011ba) and Xilinx ISE Design Suite 14.2.

تطبيق الشبكة العصبية في تكوين الشعاع المتكيف لنظام الهوائي الذكي == Neural Network Application In Adaptive Beamforming For Smart Antenna System

Author name: سليمان احمد غازي
Supervisor name: عضيد حسن سلومي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: انظمة الهوائيات الذكية تعمل على تحسين الاداء وزيادة في السعة لانظمة الاتصالات المتنقلة. ويمكن لانظمة الهوائيات الذكية حل مشكلة نظام الاتصالات المتنقلة مثل التدخل في نفس القناة، والتاخير الحاصل نتيجة الانتشار والمسارات المتعددة التي تاخذها الاشارة عن طريق | The smart antenna systems are promise to provide performance improvement and capacity increasing for the base station of mobile communication systems. Smart antenna systems can solve the problem of mobile communication system such as co - channel interference , delay spread and multipath by an advance signal processing technology called beamforming. In this work artificial neural networks (Feed Forward Neural Network (FFNN) and feedback Elman Recurrent Neural Network (ERNN) ) are used for smart antenna adaptive beamforming for one and multiple targets.Neural network is used to calculate the optimum weights of antenna array to adapt the radiation pattern of the antenna array by directing multiple narrow beams toward the desired users and nulling interference or unwanted users. FFNN and ERNN are trained by supervised backpropagation learning algorithms, FFNN was trained by using Levenberg - Marquardt (lm),Resilient Back - Propagation (Rprop), Gradient descent with momentum and adaptive learning rate (gdx), Gradient descent and adaptive learning rate (gda) and biasing regulation(br), while lm and Rprop are used to train ERNN..The simulation results show that the best performance of smart antenna adaptive beamforming for one and multiple targets is obtained when the NN (FFNN and ERNN) trained by lm algorithm as compared with other algorithms, since it consider the fastest supervised training algorithm but with more memory requirement. Where the performance of FFNN training phase based (lm) algorithm for single target for five element uniform linear array antenna is [2.746641e - 14] at epoch 27 with best validation performance and best test performance approximately equal to the best training performance. While The performance of ERNN training phase based lm algorithm for single target is [1.121938e - 14] at epoch 38 with best validation performance equal to [1.682442e - 14] and the best test performance is [3.363946e - 14].The neural network model in adaptive beamforming are compared with smart antenna adaptive beamforming based on Least Mean Square (LMS) algorithm, and gave better performance than LMS.

تقييم اداء نظام تحويل المويجات المنفصلة - مازج تقسيمات التردد المتعامد المشفر للتطبيقات ذات السرعة العالية == Performance Evaluation of DWT - COFDM System For High Speed Applications

Author name: ضفاف طلال شاكر
Supervisor name: سعد سفاح حسون
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University of Babylon - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Babylon
First pages:
Abstract: The internet revolution has created the need for wireless technologies that can deliver data at high speeds in a spectrally efficient manner. However, supporting such high data rates with sufficient robustness to radio channel impairments requires careful selection of modulation techniques. The demand for high - speed mobile wireless communications is rapidly growing. OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication systems. Abstract In this thesis, Inverse Discrete Wavelet Transform (IDWT) is used as a modulation technique instead of Inverse Fast Fourier Transform (IFFT) with coded OFDM due to its excellent orthogonality and superior spectral containment properties of wavelet filters. Coded Orthogonal Frequency Division Multiplexing (COFDM) is the same as OFDM except that forward error correction is applied to the signal before transmission. This is to minimize errors in the transmission due to lost carriers from frequency selective fading, channel noise and other propagation effects. Convolutional code is used in this thesis as a forward error correction code. The proposed (DWT - COFDM) system is simulated under the effect of additive white Gaussian noise channel, and multi - path fading channel at different values of Doppler frequencies (22.2Hz, 41.7Hz and 444.4Hz) which are the most significant impact channel parameters on the bit error rate performance. The proposed system is also compared with DWT - OFDM, FFTCOFDM and FFT - OFDM systems. It is found that the proposed system can significantly improve the BER performance and it performs better than the other three systems. On the other hand, convolutional code and DWT is used to reduce the peak to average power ratio (PAPR) which is considered the serious problem in any wireless communication system using multi carrier modulation techniques like OFDM systems by using two of the most important non distortion techniques which are selective level mapping (SLM) and partial transmit sequence (PTS) and the results show that the proposed systems for SLM and PTS techniques can perform better than the conventional SLM and PTS. The results also show that the proposed PTS technique performs better than the proposed SLM technique.

حل سريان الاحمال وتحليل الاضطرابات في منظومات القدرة على اسس المنطق المضبب باستخدام دالة الكاوسين == Fuzzy Load Flow And Contingency Analysis Based On Gaussian Distribution System

Author name: یاسر فلاح حسن
Supervisor name: حسن عبد الله كبة
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University of Baghdad - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: This thesis presented durable minimization method for solving the load flow problem and contingency analysis in on - line applications. Because the electrical power networks are complicated systems, traditional (numerical) minimization methods may encounter difficulties in solving the load flow problem and contingency analysis due to properties of the problem.Thus, the fuzzy logic applications represented by the fuzzy load flow (FLF) and fuzzy contingency analysis (FCA) methods share the best selection in - stead of the traditional methods because the artificial intelligence (AI) methods do not use the characteristics of the problem to determine the next sampling point. The obtained results are very accurate with outstanding computation time, which made the FLF suitable for real time application. In addition to these features, the FLF also able to solve load flow problem of ill - conditioned power system and contingency analysis efficiently.The FLF method using Gaussian membership function requires less number of iterations and less computing time than that required in the FLF method using triangular membership function.All the obtained results show that the computation time of the Fuzzy Load Flow (FLF) is less than the Fast Decoupled Load Flow (FDLF). Using sparsity technique for the input sparse matrix data without complicating the algorithm?s programs gives reduction in overall computation time and storage requirements. The contingency ranking process by calculating the active power and voltage performance indices (PIP and PIV) are required for real power problems and voltage problems respectively for two typical test systems being the IEEE 14 - bus and 30 - bus systems. The performance of the FLF and FCA was tested on two typical test systems being the IEEE 14 - bus and 30 - bus systems in addition to the 362 - bus Iraqi National Grid.

تحليل اخفاء الصور باستخدام الاحصاءات ذات المرتبة العالية == Image Steganalysis Using Higher Order Statistics

Author name: عمار موفق يعقوب يوسف دخان
Supervisor name: ماهر خضير العزاوي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

الشبكات اللاسلكية متعدد الهدف باستخدام خوارزمية التكيف الجينية == Multi-Objective Wireless Networks Using Adaptive Genetic Algorithm

Author name: علياء عبد الحسين
Supervisor name: ابراهيم قاسم ابراهيم
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad
First pages:

تحسين تخمين الموقع الزاوي للهدف باستخدام الخوارزمية الجينية == Improvement Of Target Angular Location Estimation In Track-While-Scan Radar System Using Genetic Algorithms

Author name: حارث ماجد صالح الدليمي
Supervisor name: وليد خالد محمد علي | محمود طاهر محمد علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تمييز الاشخاص باستخدام التحقق من عدة خواص حيوية == Person Identification Using Face And Finger Print Authentication

Author name: وائل حسين زاير اللامي
Supervisor name: وليد امين محمود الجوهر | ماجد عبد النبي علوان
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Doctorate
University: University Of Basrah - College Of Engineering
Language: English
University location: Basrah
First pages:

التخمين المتكيف لموقع وسرعة المحطات المتنقلة في انظمة الاتصالات اللاسلكية ذات الهوائي الذكي == Adaptive Estimation Of Position And Velocity For Mobile Stations In Smart Antenna Wireless Communication Systems

Author name: محمد عبد لله غالي السعدون
Supervisor name: عبد الكريم سوادي عبد الله
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University Of Basrah - College Of Engineering
Language: English
University location: Basrah
First pages:

تصنيف اشارات الدماغ الكهربائية باستخدام الشبكة العصبية والشبكة العصبية الكمية == Classification Of Electroencephalograph (EEG) Signals Using Neural And Quantum Neural Networks

Author name: ابتسام عبد الواحد رشيد
Supervisor name: Abduladhem A. Ali | Hayder M. Abdulridah
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University Of Basrah - College Of Engineering
Language: English
University location: Basrah
First pages:

تصميم منظومة استقرارية لنظام القدرة عن طريق منظومة اثارة المولد == Design Of Power System Stabilizer For Generator Excitation System

Author name: ياسر فليح حسن
Supervisor name: Basim T. Kadhem
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University Of Basrah - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Basrah
First pages:

تقييم اداء ارسال الصورة المتدرج عبر القنوات اللاسلكية == Performance Evaluation Of The Progressive Image Transmission Over Wireless Channels

Author name: نعمة هتير حسون السكيني
Supervisor name: Ghaida A.AL-Suhail | Ramzy S. Ali
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: University Of Basrah - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Basrah
First pages:

تحقيق وتنفيذ منظومة السيطرة اللاسلكية المشبكة باعتماد مبدا الخادم والزبون == Investigation And Implementation Of Client - Server Based Wireless Networked Control System

Author name: مهدي جلو مرعي الشمري
Supervisor name: Ghaida A. Al-Suhail
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Doctorate
University: University Of Basrah - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Basrah
First pages:

ضغط الكلام باستخدام ترميز التنبؤ الخطي في مجال تحويل المويجة == Speech Compression Using Linear Prediction Coding In Wavelet Domain

Author name: مصعب تحسين صلاح الدين
Supervisor name: ماهر خضير محمود العزاوي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تصحيح الخطا لبيانات كلام مضغوطة بــ سيلب == Error Correction For Speech Compressed Data Using CELP

Author name: محمد حميد خضير الدركزلي
Supervisor name: خميس عواد زيدان
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تصميم ومحاكاة هوائي جزئي متعدد النطاق الترددي للاتصالات اللاسلكية == Design And Simulation Of Multiband Fractal Antenna For Wireless Communication

Author name: ماهر حسين حمد
Supervisor name: عصام محمود عبد الباقي | جواد كاظم علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تحليل معالج نسبة الانذار الكاذب الثابت الابدالي المحسن (IS-CFAR) لمختلف حالات سوير لنك للاهداف الرادارية == Analysis Of Improved Switching Constant False Alarm Rate Processor (IS - CFAR) For Different Swerling Radar Target Cases

Author name: كريكور الكزاندر ارمايس
Supervisor name: وليد خالد عبد علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

اداء تخمين القناة في نظام التقسيم الترددي المضاعف المتعامد المستند على ترتيب الحاملات الموجهة المقطعي عبر قناة الخفوت نوع رايلي == Performance Of Channel Estimation For (OFDM) System Based On Block - Type Pilot Arrangement In Rayleigh Fading Channel

Author name: فادية نوري حمادي النعيمي
Supervisor name: مها جورج زيا
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

خوارزمية اخفاء المعلومات الصورية معتمدة تحويل المويجة المتقطع والتشفير فائق الجودة == Image Steganographic Algorithm Based On DWT And Turbo Coding

Author name: عواطف علي جعفر
Supervisor name: رفعت طالب حسين | حكمت نجم عبد الله
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تقويم اداء المرشحات لمنظومة كشف الاهداف المتحركة باستخدام خوارزميات مختلفة لازالة الاشارات المتغيرة وغير متغيرة غير مرغوب فيها == Evaluation Of MTI Filters Cancellation Using Different MTI Algorithms Against Non - Stationary And Stationary Clutter

Author name: علي خالد جاسم
Supervisor name: وليد خالد عبد علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

مشكلة نسبة قمة قدرة الاشارة الى معدلها في منظومة التردد المتعامد المتعدد التقسيمي وبعض حلولها == Peak To Average Power Ratio Problem And Some Solutions In Orthogonal Frequency Division Multiplexing System

Author name: علي جليل طاهر سباهي الظاهري
Supervisor name: ماهر خضير محمود العزاوي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

مقارنة نظام التقسيم الترددي المضاعف المتعامد مع نظام تضمين التردد الواحد بوجود تقنيتي المعادلة في مجال التردد والتضمين المتكيف == Orthogonal Frequency Division Multiplexing Versus Single Carrier Modulation With Frequency Domain Equalization And Adaptive Modulation

Author name: عباس سلمان حميد
Supervisor name: ماهر خضير محمود العزاوي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

منظومة تعريف المتكلم غير المعتمدة على النص == Text - Independent Speaker Identification System

Author name: طيف علي مهدي
Supervisor name: ماهر خضير محمود
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تصميم وبناء منظومة مزج تقسيمات التردد المتعامد المرتكزة على شفرة الالغاء متعددة الحدود و تحويل المويل باستخدام مصفوفة البوابات المبرمجة الواسعة == Design And Implementation Of Slantlet Based Polynomial Cancellation Coding - OFDM System Using FPGA

Author name: صفاء عبد الخالق علي
Supervisor name: حكمت نجم عبد الله
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

الرؤية المجسمة لتخمين المسافة باستخدام الكاميرات البصرية == Stereo Vision Distance Estimation With Optical Cameras

Author name: صبا علي صادق محمد
Supervisor name: محي محمد العزاوي | ظافر رافع زغير
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
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