Table of content

IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING

المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم

ISSN: 18119212
Publisher: University of Technology
Faculty: Control and Systems Engineering
Language: English

This journal is Open Access

About

The Iraqi Journal of Computers,Communications,Control and Systems Engineering (IJCCCE) is a quarterly engineering journal issued by the University of Technology /Baghdad ,aiming to enrich the knowledge in computer,communication and control fields .

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Contact info

IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING
University of Technology P.O.BOX. 18310
Baghdad,Iraq .
ijccce_uot@uotechnology.edu.iq
ijccce_uot@yahoo.com

Table of content: 2019 volume:19 issue:1

Article
PSO Trained Hybrid Intelligent Classifier Using Wavelet and Statistical Features for Pipeline Leak Classification

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Abstract

One of the main problems in the oil industrial field is the leakage in transporting pipelines due to its effect on human society , environment, and money loss. Therefore, the bottleneck for most researches in this subject is to minimize false alarm rate (FAR) for the adopted leak detection method. Although some recent methods succeed in classifying the existence or absence of the leak as a binary classification problem. But this paper proposed a novel leak detection technique which predicts the leak location and estimates its size within certain pre-defined ranges. In order to simulate the environmental conditions for real-time operating oil pipeline, accurate simulator known as OLGA program creates the oil physical parameters. Various methods for features extraction are considered such as statistical and wavelet techniques which are implemented to get the features from the fluid simulated waveforms. These features are organized and fed to an ANN classifier trained by PSO algorithm to determine the leak class out of 10 suggested classes. The proposed leak detection technique is used to simulate 18 kilometers belonging to Iraqi crude oil pipelines company operated in Baghdad. The achieved results of the true positive rate (TPR) for the proposed applied method for the leak detection and classification of different leak classes in terms of their positions and magnitudes were about 97%.


Article
HD-sEMG Gestures Recognition by SVM Classifier for Controlling Prosthesis

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Abstract

Electromyography signals (EMG) are an important source to infer motion intention. It has been broadly applied in human-machine interfacing to control the neurorehabilitation devices such as prosthesis and rehabilitation robot. HD-sEMG is a muscle's activity recorded at the delimited area of the skin using 2D array electrode. This strategy permits the analysis of sEMG signals in both temporal and spatial domain. Recent studies display that the spatial distribution of HD-EMG maps improves the recognition of tasks. This work investigates the use of HD-EMG recording to control upper limb prosthesis. The classification of eight hand gestures of able-bodied subjects was developed. Three feature sets were presented in this work. HOG features, time domain features(TD) and the combination of HOG and average intensity features (AIH). Combination of features possibly improved the performance of the classifier. Results show that the combined of intensity features and HOG features achieved higher performance of classifier than other features (Acc=99.37%, P=98.375%, S=97.5%).


Article
Evaluation of Vector-Controlled Asynchronous Machines

Authors: Ammar S. Muhammed2 --- Nihad M. Ameen
Pages: 20-26
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Abstract

In this paper vector control with variable frequency drive used to apply speed control of a three-phase AC Asynchronous and induction machines. The flux and torque references used to obtain the current components. Proportional-Integral controllers are used to keeping the measured current components at their reference values. The stator voltage references are the output of the PI current controllers. High-performance with the smooth operation is obtained using the proposed method. The differences can be seen in behavior dynamic state. When the motor is rotating at full speed with a full load,it reaches good current waveforms very easily due to the independent PI control of torque and magnitude of flux. In high and sudden variations of the reference input, the direct command is more efficient and less demanding for the equipment. The expressions of the fundamental variables (speed, torque, flux) and equivalent phase circuit of the machine will be reviewed.


Article
Design and development of E-passport scheme using multi encryption biometric information

Authors: Dr. Israa Shaker Tawfic
Pages: 27-34
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Abstract

within the next year, travelers from difference world may be holding a new form of a passport.The electronic passport has been widespread in recent times, all around the world, since the e-passports can save biometric identifiers.To forbidden the illegal entry of passengers into a particular state and stop the use of fake documents, an e-passport is used for more precise identification of a person.The paper used the image of the e-Passport holder as a cover image to hide the fingerprint inside it within the operation of e-Passport design. This paper suggests also an encryption security analysis of the epassport representing by using Arnold transform on fingerprint and add a privet key to encrypted data that are aimed to provide more security to the biometric information to protecting the e-passport.Our paper focuses on the security features which are suggested to make the e-Passport safer and protect it from unauthorized access.


Article
Discontinuous Control Analysis for Step Down DC-DC Voltage Converters

Authors: Bashar F. Midhat
Pages: 35-41
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Abstract

The DC-DC power converters have extreme importance in contemporary applications. Moreover, the DC-DC power converters are the ideal candidates in numerous applications such as electric and hybrid vehicles, fuel cells and others. They have been extensively researched upon over three decades. The control of these converters has been often implemented using PWM techniques and based on discrete components and integrated circuits. In this paper we propose a systematic approach for the control of step down DCDC converters with variable input voltage based on discontinuous control action. We demonstrate that the proposed algorithm achieves robustness to variations of the converter load and the input voltage without additional sensors.


Article
Design of Control System for 4-Switch BLDC Motor Based on Sliding-Mode and Hysteresis Controllers

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Abstract

This paper presents a design of a complete dual-loop controller for 4-switch brushless dc motor. In low power, low-cost applications, the 4-switch inverter topology is a felicitous alternative of the ordinary 6-switch inverter. The controller of the 4-switch BLDC motor has to be uncomplicated and can be implemented without the use of expensive hardware to avoid increasing the overall cost of the drive system. Furthermore, the control must be able to deal with the known problems of the 4-switch drive which are speed limitation and high ripple torque. The proposed controller comprises sliding mode speed control and direct current hysteresis control. To investigate the performance of the proposed design, the system is modeled by using Matlab/Simulink, the results are obtained for different working conditions. The propitious results certify the applicability of the proposed controller in low-cost 4-switch BLDC motor drive systems.


Article
Speed Controller of Three Phase Induction Motor Using Sliding Mode Controller

Authors: Walaa H. Nasser --- Dr.Farazdaq R.Yaseen
Pages: 52-62
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Abstract

A Sliding Mode Control (SMC) with integral surface is employed to control the speed of Three-Phase Induction Motor in this paper. The strategy used is a modified field oriented control to control the IM drive system. The SMC is used to calculate the frequency required for generating three phase voltage of Space vVector Pulse Width Modulation (SVPWM) invertor. When the SMC is used with current controller, the quadratic component of stator current is estimated by the controller. Instead of using current controller, this paper proposed estimating the frequency of stator voltage whereas the slip speed is representing a function of the quadratic current. The simulation results of using the SMC showed that a good dynamic response can be obtained under load disturbances as compared with the classical PI controller; the complete mathematical model of the system is described and simulated in MATLAB/SIMULINK.


Article
Particle Swarm Optimization Based LQ-Servo Controller for Congestion Avoidance

Authors: Thaker M. Nayl --- Sana S. Sabry1
Pages: 63-70
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Abstract

The network congestion is an essential problem that leads to packets losing and performance degradation. Thus, preventing congestion in the network is very important to enhance and improve the quality of service. Active queue management (AQM) is the solution to control congestion in TCP network middle nodes to improve theire performance. We design a linear quadratic (LQ)-servo controller as an AQM applied to TCP network to control congestion and attempt to achieve high quality of service under dynamic network environments. The LQ-servo controller is proposed to provide queue length stabilization with a small delay and faster settling time. The designed controller parameters are tuned by using the particle swarm optimization (PSO) method. The PSO algorithm was fundamentally applied to find the optimal controller parameters Q and R, such that a good output response could be obtained. The PI controller is examined for comparison reasons. The MATLAB simulation result shows that the controller is more effective than the PI in reaching zero steadystate error with better congestion avoidance under the dynamic network environment. Moreover, the proposed controller achieves a smaller delay and faster settling time.


Article
Routing with Energy Threshold for WSN-IoT Based on RPL Protocol

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Abstract

Internet of Things (IoT) enables things to have connectivity through the internet. The number of things is growing fast and has to be uniquely identified through the Internet to communicate with other things. In Wireless Sensor Networks (WSNs) each node can be considered as a thing. WSN node resources are very limited due to the need to communicate using low power and usually through unreliable links. Such limitations need an energy efficient routing protocol. WSN is considered as a type of Low power and Lossy Network (LLN). The routing protocol for low power and lossy network (RPL) is being adopted for LLN and has been standardized to enable connectivity of WSN over IoT. RPL constricted a topology similar to tree topology. Nodes in RPL optimized its path using an objective function (OF). OF depends on different node/link metrics in the optimization process. In this paper, an Energy Threshold RPL (ETRPL) protocol is proposed. ETRPL depends on a new objective function to enhance energy consumption of RPL protocol by taking into account the remaining energy of the preferred parent node. ETRPL is implemented using Cooja simulator. The results show that ETRPL provides an increase in the remaining energy of at least 87.4% for a small area with high number of nodes. ETRPL also performed better with regards to Time Delay, Packet Reception Ratio, and the number of dead nodes in a small area. For a large area, the performance is not encouraging. Thus the proposed ETRPL protocol is useful for IoT networks with relatively small areas.


Article
Smart Autonomous Wheelchair Controlled by Voice Commands-Aided by Tracking System

Authors: Bashra Kadhim Oleiwi --- Farah F. Alkhalid
Pages: 82-87
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Abstract

This study focuses on the design of an autonomous wheelchair based smart driving features for disabled persons. The movement directions and position tracking of the wheelchair are controlled and localized by pre-defined voice commands and global positioning system (GPS), respectively. Arduino microcontroller based on speaker dependent voice recognition module and tracking system based on quad-board SIM808 has been used to help the wheelchair navigation. The experimental tests of the proposed system have been done and given satisfactory results in controlling the wheelchair and making a call on demand. Hence the proposed system is a simple, easy to use and lowcost hardware for designing.

Table of content: volume:19 issue:1