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Article
BOCST DC/DC CONVERTER CONTROL BASED ON FUZZY LOGIC

Authors: Ali Fathel --- Ramzy S. Ali --- Jawad Radhi
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2006 Volume: 6 Issue: 1 Pages: 48-61
Publisher: Basrah University جامعة البصرة

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Abstract

This paper proposes a fuzzy logic based controller for boost type DC/DC converter. It forms an improvement to the dynamic performances of the well known P1 like fuzzy controller which uses the output voltage error & its rate of change as an inputs. The proposed controller generates a duty ratio control signal through the addition of a weighted part of the input voltage and of the low pass filtered signal of the inductor current to that of the fuzzy controller which is fed by voltage error and a signal representing the differences of the output voltage from its low pass filtered version. The controlled boost DC/DC converter exhibited excellent performances under small and larger disturbances of the input voltage and output load resistance and also showed good reference tracking ability.

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Article
Vehicle Remote Support and Surveillance System

Authors: Ahmed J. Abid --- Ramzy S. Ali
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2014 Volume: 10 Issue: 2 Pages: 55-63
Publisher: Basrah University جامعة البصرة

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Abstract

the proposed design offers a complete solution to support and surveillance vehicles remotely. The offered algorithm allows a monitoring center to track vehicles; diagnoses fault remotely, control the traffic and control CO emission. The system is programmed to scan the on-board diagnostic OBD periodically or based on request to check if there are any faults and read all the available sensors, then make an early fault prediction based on the sensor readings, an experience with the vehicle type and fault history. It is so useful for people who are not familiar with fault diagnosis as well as the maintenance center. The system offers tracking the vehicle remotely, which protects it against theft and warn the driver if it exceeds the speed limit according to its location. Finally, it allows the user to report any traffic congestion and allows a vehicle navigator to be up to date with the traffic condition based on the other system’s user feedback.


Article
Analysis of Scalability and Sensitivity for Chaotic Sine Cosine Algorithms

Authors: Ramzy S. Ali --- Dunia S. Tahir
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2018 Volume: 14 Issue: 2 Pages: 139-154
Publisher: Basrah University جامعة البصرة

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Abstract

Chaotic Sine-Cosine Algorithms (CSCAs) are new metaheuristic optimization algorithms. However, Chaotic Sine-Cosine Algorithm (CSCAs) are able to manipulate the problems in the standard Sine-Cosine Algorithm (SCA) like, slow convergence rate and falling into local solutions. This manipulation is done by changing the random parameters in the standard Sine-Cosine Algorithm (SCA) with the chaotic sequences. To verify the ability of the Chaotic Sine-Cosine Algorithms (CSCAs) for solving problems with large scale problems. The behaviors of the Chaotic Sine-Cosine Algorithms (CSCAs) were studied under different dimensions 10, 30, 100, and 200. The results show the high quality solutions and the superiority of all Chaotic Sine-Cosine Algorithms (CSCAs) on the standard SCA algorithm for all selecting dimensions. Additionally, different initial values of the chaotic maps are used to study the sensitivity of Chaotic Sine-Cosine Algorithms (CSCAs). The sensitivity test reveals that the initial value 0.7 is the best option for all Chaotic Sine-Cosine Algorithms (CSCAs).


Article
Session to Session Transfer Learning Method Using Independent Component Analysis with Regularized Common Spatial Patterns for EEG-MI Signals

Authors: Zaineb M. Alhakeem --- Ramzy S. Ali
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2019 Volume: 15 Issue: 1 Pages: 13-27
Publisher: Basrah University جامعة البصرة

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Abstract

Training the user in Brain-Computer Interface (BCI) systems based on brain signals that recorded usingElectroencephalography Motor Imagery (EEG-MI) signal is a time-consuming process and causes tiredness to thetrained subject, so transfer learning (subject to subject or session to session) is very useful methods of training that willdecrease the number of recorded training trials for the target subject. To record the brain signals, channels orelectrodes are used. Increasing channels could increase the classification accuracy but this solution costs a lot of moneyand there are no guarantees of high classification accuracy. This paper introduces a transfer learning method usingonly two channels and a few training trials for both feature extraction and classifier training. Our results show that theproposed method Independent Component Analysis with Regularized Common Spatial Pattern (ICA-RCSP) willproduce about 70% accuracy for the session to session transfer learning using few training trails. When the proposedmethod used for transfer subject to subject the accuracy was lower than that for session to session but it still better thanother methods.


Article
Parameter Estimation of a Permanent Magnetic DC Motor

Authors: Murtadha L. Awoda --- Ramzy S. Ali
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2019 Volume: 15 Issue: 1 Pages: 28-36
Publisher: Basrah University جامعة البصرة

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Abstract

The identification of system parameters plays an essential role in system modeling and control. This paperpresents a parameter estimation for a permanent magnetic DC motor using the simulink design optimization method.The parameter estimation may be represented as an optimization problem. Firstly, the initial values of the DC motorparameters are extracted using the dynamic model through measuring the values of voltage, current, and speed ofthe motor. Then, these values are used as an initial value for simulink design optimization. The experimentally inputoutputdata can be collected using a suggested microcontroller based circuit that will be used later for estimating theDC motor parameters by building a simulink model. Two optimization algorithms are used, the pattern search andthe nonlinear least square. The results show that the nonlinear least square algorithm gives a more accurate resultthat almost approaches to the actual measured speed response of the motor.


Article
Designing robust Mixed H /H PID Controllers based Intelligent Genetic Algorithm

Authors: Ali Abdullah K. Al-Thuwainy --- Ramzy S. Ali Al-Waily
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2011 Volume: 7 Issue: 1 Pages: 25-34
Publisher: Basrah University جامعة البصرة

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Abstract

It's not easy to implement the mixed /optimal controller for high order system, since in theconventional mixed / optimal feedback theorder of the controller is much than that of the plant.This difficulty had been solved by using the structuredspecified PID controller. The merit of PID controllerscomes from its simple structure, and can meets theindustry processes. Also it have some kind ofrobustness. Even that it's hard to PID to cope thecomplex control problems such as the uncertainty andthe disturbance effects. The present ideas suggestscombining some of model control theories with thePID controller to achieve the complicated controlproblems. One of these ideas is presented in this paperby tuning the PID parameters to achieve the mixed/ optimal performance by using IntelligentGenetic Algorithm (IGA). A simple modification isadded to IGA in this paper to speed up theoptimization search process. Two MIMO example areused during investigation in this paper. Each one ofthem has different control problem


Article
NOVEL SYNTHESIS METHODOLOGY FOR CONTROLLING ZERO-CURRENT ZERO-V0LTGE TRANSITION DC/DC BOOST CONVERTER

Authors: Elaf J. Majeed --- Ramzy .S. Ali --- R. H. Thejel
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2006 Volume: 6 Issue: 1 Pages: 11-26
Publisher: Basrah University جامعة البصرة

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Abstract

Among the soft-switching techniques, the Zero-Current Zero-Voltage Transition (ZCZVT) technique is used in this paper. It is based on the Resonant Transition Mechanism requirements, which permit newcomers to perceive the Resonant Transition techniques as a whole instead of dissimilar soft-switching techniques. The open loop operation of the power circuit (DC/DC Boost Converter) and control circuit have been implemented and tested with MatLab software. The simulation test facility and the analytical development tools being used are described. The derivation of closed loop control strategy based on fuzzy logic control with nonlinear fuzzy sets for input and output variables is described in detail. The closed loop simulation results that describe the performance of the proposed converter with this control strategy due to different effects are also included.

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Article
Sidelobe Reduction in Linear and Planar Array Antenna Using the Genetic Algorithm

Authors: Ramzy S.Ali --- Abdul Kareem S.Abdallah --- Ali Abdulhadi Noaman
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2010 Volume: 10 Issue: 2 Pages: 111-125
Publisher: Basrah University جامعة البصرة

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Abstract

This paper describes the problem of minimizing the sidelobe levels in the radiation pattern of antenna arrays by using the genetic algorithm. Two types of genetic algorithms representation are used here: binary and continuous genetic algorithms depending on the nature of the problem at hand. Adaptive genetic algorithm which is a special type of genetic algorithm is used in this work. The obtained results explain the capability of this approach to obtain the desired sidelobe level.

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Article
Design and Implementation of RFID Active Tags and Mutual Authentication Protocol with Ownership Transfer Stage

Authors: Issam A. Hussein --- Ramzy S. Ali --- Basil H. Jasim
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2017 Volume: 13 Issue: 1 Pages: 83-103
Publisher: Basrah University جامعة البصرة

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Abstract

Radio frequency identification (RFID) technology is being used widely in the last few years. Its applications classifies into auto identification and data capturing issues. The purpose of this paper is to design and implement RFID active tags and reader using microcontroller ATmega328 and 433 MHz RF links. The paper also includes a proposed mutual authentication protocol between RFID reader and active tags with ownership transfer stage. Our protocol is a mutual authentication protocol with tag’s identifier updating mechanism. The updating mechanism has the purpose of providing forward security which is important in any authentication protocol to prevent the attackers from tracking the past transactions of the compromised tags. The proposed protocol gives the privacy and security against all famous attacks that RFID system subjected for due to the transfer of data through unsecure wireless channel, such as replay, denial of service, tracking and cloning attacks. It also ensures ownership privacy when the ownership of the tag moves to a new owner


Article
Simulation of Speed Control for Synchronous Reluctance Motor Based on Tuning Cascaded pid Controller with pso Algorithm
المحاكاة والسيطرة على سرعة المحرك التردد المتزامن بالاعتماد على ضبط ثوابت المتحكم المتعاقب PSO و بأستخدام خوارزمية PID

Authors: Khalid M. Abdul-hassan --- Ramzy s. Ali --- Shahzanan Ali Kahdum
Journal: University of Thi-Qar Journal for Engineering Sciences مجلة جامعة ذي قار للعلوم الهندسية ISSN: 26645564/26645572 Year: 2016 Volume: 7 Issue: 2 Pages: 1-15
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

This paper presents simulation and control of synchronous reluctance motor (SynRM).The motor speed is controlled by using Traditional PID controller that have been used incascaded form. The Particle Swarm Optimization (PSO) is used to find the optimal parametersof the PID controller. Lead-Lag controller introduce in the cascaded controller as a secondstage of control. Space vector pulse width modulation (SVPWM) scheme proposed to controlthe motor by using variable input voltage. A comparison between the manually tuned and PSOtuned cascade controller shows that the PSO give amazing control characteristics for the motorspeed and have advantage over the manually tuning controller.

يتم التحكم في سرعة المحرك باستخدام .)SynRM( هذا البحث يمثل محاكاة وسيطرة على محرك التردد المتزامنللحصول )PSO( التي تم استخدامها في شكل متعاقب. أستخدمت خوارزمية أسراب الطيور (PID( وحدة التحكم التقليديةتم أستخدام وحدة تحكم المعوض المتقدم- المتأخر كمرحلة ثانية من السيطرة. تم .PID على القيم المثلى لثوابث وحدة تحكمللسيطرة على المحرك عن طريق تغيير فولتية الادخال )VS-SVPWM( إقتراح إستعمال تقنية العاكس ثلاثي الاطواريعطي قيم PSO وتبين أن PSO للمحرك. تمت المقارنة بين وحدة تحكم التي تم ضبطها يدويا والتي تم ضبطها باستخدامالثوابت المثلى والتي تعطي خصائص سيطرة مدهشة لسرعة المحرك ولها ميزة على وحدة التحكم التي تم ضبطها يدويا.

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