Enhanced Flux Weakening Control of PMM-Based Starter-Generator System in More Electric Aircraft

Research Abstract

this paper proposes a control scheme for permanent magnet machine (PMM) based aircraft starter/generator (S/G) operated in flux weakening (FW) mode. In contrast to previous publications, the proposed control scheme uses a single current regulator to adjust the q-axis reference voltage, and the d- axis voltage is calculated considering the maximum available voltage from the converter. This allows the full utilization of DC bus voltage and improves the machine efficiency. Furthermore, it is more robust against with regards to machine parameters variation. The analytical design results and the system performance are confirmed by time domain simulation and compared against traditional approach.

Research Authors
M. A. A. Mohamed, M. Rashed, S. Bozhko
Research Department
Electrical Engineering Department
Research Member
Mohammed Ali Abdel Jalil Mohammed
Research Publisher
IET
Research Year
2021

Artificial neural network aided cable resistance estimation in droop-controlled islanded DC microgrids

Research Abstract

Most of the existing methods used to estimate the cable resistance require the use of many hardware devices and the injection of perturbations to the system. Therefore, they are time-consuming, costly and prone to errors. In addition, the injection of perturbations has the potential of degrading the power quality of the system. In this paper, a new artificial neural network (ANN) aided cable resistance estimation approach is proposed. The ANN model is trained by simulation data. The trained ANN model can quickly and effectively map the current sharing ratios between the converters to the droop coefficients of the converters. In this way, the optimal droop coefficient combination that will yield the desired accurate current sharing ratio between the converters can be predicted by the trained ANN model. Subsequently, the optimal droop coefficient combination can be used in the estimation of the corresponding subsystem 

Research Authors
Habibu Hussaini, Tao Yang, Yuan Gao, Cheng Wang, Mohamed AA Mohamed, Serhiy Bozhko
Research Date
Research Department
Electrical Engineering Department
Research Member
Mohammed Ali Abdel Jalil Mohammed
Research Publisher
IEEE
Research Year
2021

Control of DC-DC Converter for Interfacing Supercapcitors Energy storage to DC Micro Grids

Research Abstract

The DC/DC converter control presents non-minimum phase behaviour in boost mode as its control plant has a Right Hand Plane (RHP) zero. The RHP zero restricts the achievement of high dynamic performance and make the control design a challenging task. This paper investigates the use of classic PI controller and Model Predictive Control (MPC) to regulate the converter output voltage to achieve high dynamic performance. The DC/DC converter under study is a non-isolated bidirectional DC/DC converter interfacing supercapacitors energy storage device to a DC Micro Grid(DCMG). The MPC control problem is formulated as a current regulation problem, which enables using a short prediction horizon and hence less computational power. The controllers design are compared and performance are verified using MATLAB software.

Research Authors
MAA Mohamed, Q Guan, M Rashed
Research Date
Research Department
Electrical Engineering Department
Research Member
Mohammed Ali Abdel Jalil Mohammed
Research Year
2018

Variational Approach for Joint Kidney Segmentation and Registration from DCE-MRI Using Fuzzy Clustering with Shape Priors

Research Abstract

The dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) technique has great potential in the diagnosis, therapy, and follow-up of patients with chronic kidney disease (CKD). Towards that end, precise kidney segmentation from DCE-MRI data becomes a prerequisite processing step. Exploiting the useful information about the kidney’s shape in this step mandates a registration operation beforehand to relate the shape model coordinates to those of the image to be segmented. Imprecise alignment of the shape model induces errors in the segmentation results. In this paper, we propose a new variational formulation to jointly segment and register DCE-MRI kidney images based on fuzzy c-means clustering embedded within a level-set (LSet) method. The image pixels’ fuzzy memberships and the spatial registration parameters are simultaneously updated in each evolution step to direct the LSet contour toward the target kidney. Results on real medical datasets of 45 subjects demonstrate the superior performance of the proposed approach, reporting a Dice similarity coefficient of 0.94 ± 0.03, Intersection-over-Union of 0.89 ± 0.05, and 2.2 ± 2.3 in 95-percentile of Hausdorff distance. Extensive experiments show that our approach outperforms several state-of-the-art LSet-based methods as well as two UNet-based deep neural models trained for the same task in terms of accuracy and consistency.

Research Authors
Moumen El-Melegy, Rasha Kamel, Mohamed Abou El-Ghar, Norah S. Alghamdi, and Ayman El-Baz
Research Date
Research Department
Electrical Engineering Department
Research Journal
Biomedicines
Research Member
Moumen Taha Hanafy Ahmed El-Melegy
Research Publisher
MDPI
Research Rank
1
Research Vol
11
Research Website
https://www.mdpi.com/2227-9059/11/1/6
Research Year
2023

Evaluation of the Risk Factors Impacting the Cost Overruns in the Construction of Roads in Egypt during the COVID-19 Pandemic Construction of Roads in Egypt during the COVID-19 Pandemic

Research Abstract

Cost overruns are a common problem in the global construction industry, which affects the development of road construction, particularly in developing countries. Moreover, many risk factors in road construction might result in project cost overruns, particularly during COVID-19. So, the research aimed to look into the new risk variables' severity when a coronavirus infection was present. The primary goal of the study is to identify the most important risk variables affecting the construction of roads in Egypt, especially during COVID-19 to lessen the likelihood and impact of those risks. The likelihood and effects of the identified risks were determined by conducting a questionnaire survey on a set of 11 risk categories made up of 162 risks. The study's findings also indicate that the excessive and illegal loads on the roads, the fluctuating value of the Egyptian pound, and the accruing interest on loans to the contractor as a result of the work interruption caused by the coronavirus are the high-risk factors that have the greatest impact on cost overruns for road projects. In addition, the cost matrix has also been used to display risk factor levels as a road map for responding quickly to high risks.

Research Authors
Yasser A.S Gamal, Elsayed Mohamed Abd Allah, Mina Maged, Mahmoud Enieb
Research Date
Research Department
Civil Engineering Department
Research Journal
Mansoura Engineering Journal
Research Member
Mahmoud Enieb Osman Enieb
Research Pages
1-24
Research Publisher
Elsevier
Research Rank
National Journal
Research Vol
48 (4)
Research Year
2023

The President of Assiut University conducts an inspection tour of the sectors and units of the Faculty of Engineering. He confirms: The College of Engineering is a house of expertise for the community

The President of Assiut University conducts an inspection tour of the sectors and units of the Faculty of Engineering. He confirms: The College of Engineering is a house of expertise for the community

Minshawi: The Faculty of Engineering keeps pace with the requirements of fourth-generation universities and future jobs

Prof. Dr. Ahmed El-Minshawy, President of Assiut University, conducted this morning an inspection tour at the Faculty of Engineering, where he was received by Prof. Dr. Nubi Mohamed Hassan, Dean of the Faculty of Engineering, Prof. Dr. Ezzat Marghani, Vice Dean for Education and Student Affairs, Prof. Dr. Mohamed Safwat, Vice Dean for Community Service and Environmental Development, Prof. Dr. Moamen Taha Hanafi, Vice Dean for Graduate Studies and Research, and Dr. Walid Abu Al-Wafa, Director of the Workshops Department at the Faculty of Engineering. And a group of faculty professors from various departments and a number of employees and students.

Dr. Ahmed El-Menshawy began his inspection tour at the "Internet of Things (IOT)" laboratory, Department of Biomedical Engineering, which is one of the leading model laboratories at the level of Egyptian universities, and specializes in providing Internet of Things technology, embedded systems, and manufacturing mechanisms such as three-dimensional printing machines, praising the role of the Faculty of Engineering as an integrated house of expertise, specialized in providing distinguished engineering services, and its various units that keep pace with the digital age, and the requirements of fourth-generation universities and future jobs. Prof. Dr. Reda Ragab, coordinator of the program, was in the honor of receiving him, where Dr. Mohamed Medhat Tawfiq Abdel Rahim, supervisor of the laboratory, reviewed some modern devices and machines at the Faculty of Engineering, such as the CNC device and the 3D printer.

Prof. Dr. Nubi Mohamed Hassan explained that the tour of the President of the University included a visit to the student projects exhibition, which numbered about 40 projects for college students in its various departments, and the projects of the students of the Civil Engineering Department varied between the designs of bridges, factories, suspension bridges, hospitals, covering factories and garages, and the projects of the Mechatronics Department varied between designs of a line for the production of expiration date printing, a robotic arm, and elevators, as for electricity and communication projects, including a 3D printer, a satellite, and a submarine.

Prof. Dr. Nubi Mohamed Hassan added that the visit of the President of the University concluded with an inspection of the Center for Engineering Studies and Consultations, pointing out that he has an important role in preparing designs and projects, supervising implementation, conducting laboratory and field tests and experiments, providing training courses, conducting studies, technical reports, and consulting in various engineering disciplines, as well as achieving leadership in this field at the national, regional and international levels, according to the highest quality standards.

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ITI Caravan in the yard of the Faculty of Engineering

The College of Engineering Square witnesses the continuation of the work of ITI Caravan

It is an awareness convoy during which the coordinators of the institute's programs are present in the courtyards of the faculties of Assiut University to introduce the programs and initiatives of the institute, registration and opinion poll about the training programs that students wish to implement or register in the tracks proposed to be implemented for students during winter and summer training camps and answer students' inquiries and questions.

The representatives of the branch are present at the Faculty of Engineering for 3 days from Tuesday 5/16 until Thursday 5/18, after which they will move to another faculty of Assiut University.

Within the framework of the state's strategy to support the electronics industry, the Information Technology Institute (ITI) offers training scholarships to graduates of Egyptian universities, from 2014 to 2023, in the following areas:

- Embedded Systems

- Internet of Things

- Industrial Automation

- LTE Networks Engineering

- Digital IC Design

- Digital Verification

- AMS IC Design & Layout

The scholarship is offered to graduates of the Faculty of Engineering majors: (Communications, Electronics, Computers, Mechatronics, Automatic Control Engineering, Medical Engineering, Electrical Power Engineering, Computer Science)

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Construction Engineering and Project Management Program Workshop

Workshop of the Construction Engineering and Project Management Program under the auspices of Prof. Dr. Nubi Mohamed Hassan, Dean of the Faculty, and the supervision of Assistant Prof. Dr. Walid Abu Al-Wafa Mohamed, Program Coordinator

The Construction Engineering and Project Management program yesterday witnessed a workshop entitled

Practical applications in advanced waterproofing and thermal insulation works in Runway 408 - Fourth Floor of the Civil Engineering Department

In which Eng. Mustafa Basiony Abdel Rahman, a training engineer at the Modern Building Chemicals Company, lectured.

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Attending the Faculty of Engineering in the First Scientific Forum for Environmentally Friendly Projects

The Faculty of Engineering was honored by the distinguished participation and attendance in the first scientific forum for environmentally friendly projects, at exactly nine thirty in the morning on Sunday, 14/5/2023 in the eighth hall of the administrative building under the auspices of Prof. Dr. Ahmed Al-Menshawy, President of the University, and Prof. Dr. Mahmoud Ahmed Abdel Alim, Acting Vice President for Community Service and Environmental Development.

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