ABDELGHAFOUR Herizi

LAKEHAL Mohammed , HELITIM Amine el wahdi

Commande hybride glissant-flou type 1 et type2 de la machine asynchrone a cage d’écureuil (MAS)

OULHA Ibrahim , CHELIHI Narimane

Commande hybride backstepping floue type 1 et type 2 d’un système de conversion d’énergie éolienne basé sur une machine asynchrone à double alimentations (MADA)

BENYAHIA Moustafa , SACI Wafa

Commande à flux orienté basé sur des régulateurs : PI, floue type 1, floue type 1 adaptative et floue type 2

BOUDRAS Abdelghafour

Commande Hybride Backstepping - Floue de la Machine Asynchrone

HOUD Seyf eddine , SAIDI Ahmed

Commande hybride vectorielle - floue de la machine asynchrone

LITOUDJI Imad Eddine , OUADADI Tayeb

Commande hybride glissant floue type1 et 2 de la machine synchrone à aimants permanents

ROUMAIR Cheyma , SALMI Lamis

Commande glissant floue type 1 et 2 d’un système de conversion d’énergie éolienne basée sur MADA

CHAOUCHI Lakhdar , BENTOUMI Mohamed, BAKRI Ala eddine

Conception d’un protecteur auditif à suppression de bruits dominants

MADACI Hanane , ZERROUAK Amel

Conception d’un filtre actif intégré à un appareil auditif

FERAHTIA Boukhalfa , BOUDJELLAL Abderaouf

Commande floue adaptative de la machine synchrone à aimant permanent

BOUDJELLAL Djamal eddine

Commande hybride backstepping-floue de la machine asynchrone à double alimentation

GHOUL Nacer

Commande par mode glissant-flou d’une génératrice asynchrone à double alimentation

BOUREZG Mohammed , BENSAADIA Abdelwahab

Commande floue adaptative des puissances active et réactive générés par un système de conversion d’énergie éolien

NOUAOUI Islame , BERRAH Nidal, ASLAFI Ahmed

Modélisation et simulation d’un pendule inversé

DJAAFRI Abdesalam , ADJILI Sofiane

Commande floue type 2 d’un système de conversion d’énergie éolienne basé sur une machine asynchrone double alimentée (MADA)

DJAAFRI Abdesalam , ADJILI Sofiane

Commande floue type 2 d’un système de conversion d’énergie éolienne basé sur une machine asynchrone double alimentée (MADA)

HADJAL Abdelkader , SIOUANI Salah eddine

Conception d’une loi de commande robuste pour un système éolien à base d’une machine asynchrone à double alimentation

MAHMOUDI Ridha , SMAINI Houssam Eddine

Commande Floue Type 2 de la Machine Asynchrone a Double Alimentation

KRIM Soufiane , HACHI Elkhier

Commande Hybride Glissant Floue de la Machine Asynchrone à Double Alimentation

MERZOUGA Med Mahdi , AZZEDDINE Faouzi

Commande par Backstepping à Flux Orienté de la Machine Asynchrone à Double Alimentation

ZEGHLACHE Hemza , BETKA Khalid

Etude comparative entre différents techniques de commande appliquée sur un système éolien à vitesse variable à base d'une MADA

BOUDIA Moustafa , ZAOUI Abdelhalim

Etude comparative entre différents techniques de commande appliquée sur une Machine à Aimant permanant

MERZOUGUI Walid , BELHOUANE Azzedine

Etude comparative entre différents techniques de commandes appliquées à la Machine Asynchrone

BENCHOHRA Younes , BOUDISSA Fatima zohra, RIGUET Manal oumaima

Commande d'un système non linéaire à base de la logique floue

MATAOUI Ayoub , MESSAADI Hakima, ZAWALI Bouchra

Optimisation un régulateur PID par la méthode de zieglre nicholes

KOURICHE Saad , BENLOUMAFEK Abdelbaki, HADJI Abdelmalek

La méthode d’optimisation curve fitting « Isqcurvefit »

BOUCHLALEG Oussama , KAFZI Zakaria, BOURAHLA Khadidja

Optimisation d'un régulateur PID par la méthode levenberg-marquardt « Isqnonlin »

LEVRACK Ahmed cheikh , SIDI IBRAHIM Mohamed salem, MEZACHE Mohamed

Optimisation d'un régulateur PID par la technique PSO « Particle Swarm Optimization »

Oulad yahia yahia

Commande vectorielle de la machine asynchrone à flux rotorique orienté

BENDOUI Abderazak

Commande par mode de Glissant de la Machine Asynchrone

AL SIDCHIKH Zoubir , AMIEUR Zoubir

Etude de la conception et de fonctionnement d’une machine asynchrone (au sein de l'entreprise Sonatrach-oued noumer)

FELLAN Taher , FRINGOU Souidi

Mise en place de la maintenance préventive et de son organisation au sein de l'entreprise PLASTUB-Ghardaïa

GOMRI Said mama

Mise en place de la maintenance préventive et de son organisation au sein de l'entreprise ALFAPIPE-Ghardaïa

BENYAHIA Imane , ABOUDA Zoulikha

Etude et évaluation du système de maintenance de l'entreprise SKTM-Tamanrasset

KADRAOUI Aicha

Etude et évaluation du système de maintenance de l'entreprise ALFAPIPE-Ghardaïa

LAGNEJ Rekia , BEN AMMAD Meriama

Les systèmes de protection du réseau de transport d’électricité de la ligne 220KV Ghardaïa - Ouargla

HOUACHE Daoud , MEKNI Mohamed

Modélisation de la machine asynchrone

BORDJ Brahimelkhalil , BOUAMER Mohamed elbachire, GUENZOUL Ahmed

Etude pratique sur le groupe électrogène UPS 1600 kva (sonatrach-oued noumer)

BALLA Rostom , AHMANI Slimane albaroune

Commande des systèmes non linéaires par backstepping

In this work, we will develop a robust control algorithm known for its stability and robustness, this control is based on the theory of lyapunov applied to the induction motor to obtain robust performance in the point of parametric or external variation, this machine driven by stator variables through two bidirectional converters. In the first part we have modelled the machine and its converters. In the second part, we developed the control system needed to control the mechanical power (speed, torque) produced by this machine. The numerical simulation results obtained by applying this control to our machine show the effectiveness of the control developed.

Citation

ABDELGHAFOUR Herizi , ,(2023-12-29), Robust Sliding Mode Control of Mechanical Power Produced by an Induction Motor (IM),9th Ankara International Congress On Scientific Research,Ankara, Turkey

More recently, an optimization method called PSO "particle swarm optimization", inspired by swarm intelligence, has attracted researchers and been exploited in different fields of technology optimization. This method has become more and more popular. It is characterized by a decentralized way of working that imitates the behavior of swarms of social insects, masses of birds, or schools of fish. As part of this work, we try to apply the PSO algorithm to determine the optimum parameters (𝐾𝑝, 𝐾𝑖 and 𝐾𝑑) of the PID regulator while visualizing our objective function which we seek to minimize the error between the input signal and the output signal. The proposed method was more robust, flexible and effective in terms of dynamic performance like reducing peak overshoot, rise time, response time and static error.

Citation

ABDELGHAFOUR Herizi , ,(2023-12-26), Optimization of a PID Regulator by the PSO “Particle Swarm Optimization” Technique,3rd International Conference on Scientific and Academic Research,Konya, Turkey

In this work, our objective is to optimize the parameters of a PID regulator, that is to say the coefficients 𝐾𝑝, 𝐾𝑖 and 𝐾𝑑 by the Levenberg-Marquardt (LM) method. Different optimization methods will be presented such as the AG genetic algorithm, ACO ant colony algorithms and particle swarm optimization (PSO). The Levenberg-Marquardt algorithm can be considered as that of Gauss-Newton combined with the confidence region method. This method is robust and efficient in terms of dynamic performance such as reduction of maximum overshoot, rise time, response time and static error. Finally, finishing this work with an application of this technique on a nonlinear system controlled by a PID regulator.

Citation

ABDELGHAFOUR Herizi , ,(2023-12-05), Optimization of a PID regulator using the Levenberg-Marquardt method,2nd International Conference on Frontiers in Academic Research,Konya, Turkey

In this work, we are going to develop two control techniques based on the orientation of the stator flux with different controllers, namely: type 1 fuzzy control, type 1 adaptive fuzzy control to apply to the permanent magnet synchronous machine to solve the parametric variation problems to obtain robust performance in the parametric or external variation point, this machine driven by the stator variables through two converters. In the first part we have modelled the machine and its converters. In the second part, we have developed the necessary commands to control the mechanical power (speed, torque) produced by this machine, we have carried out a comparative study between the two control systems developed. The numerical simulation results obtained during the application of the type 1 adaptive fuzzy control on our machine show the effectiveness of this implemented control.

Citation

ABDELGHAFOUR Herizi , ,(2023-11-26), Type 1 Adaptive Fuzzy Logic Control of a Permanent Magnet Synchronous Machine (PMSM),8th International Education and Innovative Sciences Congress,Ankara, Turkey

The objective of automatic regulation or control of a process is to keep it as close as possible to its operating optimum. The Ziegler-Nichols method among the methods for optimizing PID regulator gains. This method is based on their experience and some simulations to quickly adjust the parameters of the P, PI and PID regulators. As part of this work, we try to apply the Ziegler-Nichols method to determine the optimum parameters (Kp, Ki, Kd) of the PID regulator while visualizing our objective function which we seek to minimize the error between the signal input and output signal. The studied method was robust, flexible and efficient in terms of dynamic performance such as reduction of peak overshoot, rise time, response time and static error.

Citation

ABDELGHAFOUR Herizi , ,(2023-11-21), Optimization of a PID Regulator Using the Zieglre Nicholes Method,4th International Conference on Engineering and Applied Natural Sciences,Konya, Turkey

This paper presents a reliable control technique for the doubly-fed induction generator used in the wind energy conversion system, where the stator flux direction is used to separate the active and reactive power produced by the DFIG. It is possible to maximise the energy output (efficiency) using the proposed control, which combines sliding mode control with type-2 fuzzy logic. This technique is resistant to the modelling uncertainties of the generator and the wind turbine. Finally, simulation on Matlab/Simulink was used to evaluate and compare the performance of the system in terms of compliance and robustness to DFIG parameter variations.

Citation

ABDELGHAFOUR Herizi , ,(2023-10-26), Active and Reactive Power Control of a Doubly Fed Induction Generator Using Sliding Control with Interval Type-2 Fuzzy Controller,1st National conference on renewable energies and the environment, challenges and applications,University centre Abdelhafid Boussouf of Mila

More recently, an optimisation method called "curve fitting", inspired by error minimisation, has attracted researchers and has been used in various areas of optimisation. This method has become increasingly popular. It is based on the principle of least squares, i.e. minimising the sum of errors. As part of this work, we try to apply the curve fitting algorithm to determine the best curves in general cases (linear and non-linear), while visualising our objective function, which we seek to minimise the error between the experimental signal and the estimated signal. The proposed method was more robust, flexible and efficient in terms of dynamic performance such as reduction in peak overshoot, rise time, response time and static error.

Citation

ABDELGHAFOUR Herizi , ,(2023-10-20), The Curve Fitting Optimization Method,2nd International Conference on Recent Academic Studies,Konya, Turkey

The Curve Fitting Optimization Method

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FAYSSAL Ouagueni , ABDELGHAFOUR Herizi , ,(2023-10-19), The Curve Fitting Optimization Method,2nd International Conference on Recent Academic Studies ( ICRAS’2023),,Konya, Turkey

To achieve efficient control of a dynamic system, we must have a mathematical model that satisfactorily represents the real behaviour of the system. In this paper we present the modelling of an inverted pendulum. We develop the mathematical model of an inverted pendulum based on the EulerLagrange formalism, followed by a linearisation around the two possible equilibrium points. A series of simulations carried out using the Matlab/Simulink software have been considered, not only with the aim of validating the model obtained, but also with a view to using them to validate the control strategies developed in future work.

Citation

ABDELGHAFOUR Herizi , ,(2023-09-28), Modeling and Simulation of an Inverted Pendulum,3rd International Conference on Innovative Academic Studies,Konya, Turkey

Solid Oxide Fuel Cells (SOFCs) are electrochemical devices operating at high temperatures, directly transforming chemical energy into electrical energy, offering significant potential as a clean and efficient power generation technology. The primary challenge concerning SOFCs is the intricacy of regulating the output voltage. This challenge is attributed to the strong nonlinearity, swift load variations, and restricted fuel flow. The primary objective of the SOFC system's control is to maintain a constant level of the output voltage respecting the safety intervals of the fuel utilization rate and the oxy/Hyd ratio. In this context, a new adaptive fuzzy PID controller (FPID) approach is proposed to control the output voltage of the SOFC nonlinear system, where two FPIDs controllers were used one for the hydrogen flow and the other for the oxygen flow. Simulation results are presented to demonstrate the effectiveness and accuracy of the proposed approach in front of other control strategists that use a constant ratio between the reactants.

Citation

ABDELGHAFOUR Herizi , , (2023-09-01), A new fuzzy adaptive PID controller approach design for solid oxyde fuel cell power plant, NeuroQuantology, Vol:21, Issue:6, pages:2049-2060, F. Ouagueni

In this paper, we will develop an adaptive control algorithm applied to the wind energy conversion system (WECS) based on a double-fed induction machine (DFIM) driven by a turbine with variable blade pitch, and controlled through the rotor variables by two bidirectional converters. The main function of these converters in the considered system is the connection of the wind generator to the power grid in two different ways: one on the grid side converter which will allow continuous bus control and improve the power factor on the grid side; the other, on the converter on the rotor side, which will allow the control and optimization of the energy flow generated by the stator during the periods of operation of this system. In the first part we presented the individual modeling of the wind turbine chain, then we presented and developed the controls necessary to control the active and reactive powers produced by this system in order to ensure optimum performance and production quality.

Citation

ABDELGHAFOUR Herizi , , (2023-08-01), Adaptive type-1 fuzzy control of a wind energy conversion system based on a double-fed induction machine, Przegląd Elektrotechniczny, Vol:99, Issue:8, pages:110-115, L. Bensaadia

The objective of automatic regulation or control of a process is to keep it as close as possible to its optimum functioning. Fuzzy logic controllers among the modern methods of optimizing the system response. Fuzzy logic is usually expressed by linguistic rules of the form IF-THEN. Within the framework of this work, we try to replace the controller (PI-classic) by a controller based on the fuzzy logic to improve the response of the system. The goal of our study is to try to minimize the error between the input signal and the output signal. The studied technique was robust and effective in terms of dynamic performance such as reduction of maximum overshoot, rise time, response time and static error.

Citation

ABDELGHAFOUR Herizi , ,(2023-07-12), Control of a Nonlinear System Based on Fuzzy Logic,5th International Conference on Applied Engineering and Natural Sciences,Konya, Turkey

The control of the doubly-fed induction motor is a complex operation because of this motor characterised by a non-linear multivariable dynamics, having settings that change over time and a significant link between the mechanical component and magnetic behavior (flux) (speed and couple). This article then proposes a new strategy of a robust control of this motor, which is decoupled due to the stator flux’s direction. The proposed control is integrated with the backstepping control which based on Lyapunov theory; this approach consists in constructively designing a control law of nonlinear systems by considering some state variables as being virtual commands, and the important branch of artificial intelligence type-2 fuzzy logic. The hybrid control backstepping-fuzzy logic consists in replacing the regulators applied to the backstepping control by regulators based on type-2 fuzzy logic. This control will be evaluated by numerous simulations where there is a parametric and non-parametric variation.

Citation

ABDELGHAFOUR Herizi , RIYADH Rouabhi , Abderrahim ZEMMIT , , (2023-06-28), Speed control of doubly fed induction motor using backstepping control with interval type-2 fuzzy controller, Diagnostyka, Vol:24, Issue:3, pages:1-8, A. Herizi

Ce cours a pour objectif de maîtriser les techniques modernes de l’automatique pour l’identification et l’estimation des modèles des systèmes, sur les plans des principes théoriques et de la mise en œuvre pratique à l’aide de nombreux exemples.

Citation

ABDELGHAFOURHerizi , ,(2023-05-28); Modélisation et identification des systèmes,University of M'sila,

This paper presents a design modeling of ‎short circuit faults in the stator ‎windings for a Permanent ‎Magnet ‎Synchronous Machine (PMSM).‎ The studied approach is based on developing two mathematical models describing the studied machine's healthy and faulty states.‎ Furthermore, to study the behavior of the overall system, formed by the considered machine and its drive, a dynamic ‎model of the drive is elaborated to study its comportment in various ‎fault ‎conditions.‎ Based on frequency analysis, the Fast Fourier Transform (FFT) is adopted to detect the occurrence of short-circuited turns to highlight relevant features revealing the stator winding faults.‎ The ‎spectral analysis of the ‎stator current decomposition shows ‎the total harmonic distortion (THD), which can be ‎used as a ‎reliable ‎predictor of (ITSC) faults.‎Simulation results for the "healthy" and "faulty" states of the machine show the application contribution of the FFT ‎for stator fault detection.‎

Citation

ABDELGHAFOUR Herizi , ,(2023-05-01), FFT Tool for Stator Winding Fault Detection: Application to a Permanent Magnet Synchronous Motor,6Th IEEE International Conference on Advanced Systems and Emergent Technologies,Méhari Hammamet Hotel, Tunisia

The main idea of this work is to exploit the "BACKSTEPPING" technique based on Lyapunov’s theory for designing stabilizing controls for a special recursive class of nonlinear systems. By considering some state variables as being virtual controls, and designing intermediate control laws for them. Some internal variables are sometimes inaccessible to measurement or expensive to measure, hence the introduction of observers based on the same principle. Finally, we applied this technique to DC motor, and according to the results we find, (short response time, good disturbance rejection and good accuracy in steady state), we think this means that the back stepping technique offers the best possible performance, and the simulation results confirm it.

Citation

ABDELGHAFOUR Herizi , ,(2023-04-06), Lyapunov and Backstepping Control Design of Direct Current Motor,2nd International Conference on Engineering, Natural and Social Sciences,Konya, Turkey

In this paper, the fuzzy adaptive gain monitoring method (AGFLC) uses direct field-oriented control (DFOC) to monitor the speed of permanent magnet synchronous motors (PMSM). This surveillance strategy can detect the error of the velocity parameter, forcing the monitored system to achieve the desired reference model, and eliminating the velocity error. First, we examine the mathematical model describing the internal behavior of PMSM to design our system based on the priory physical model of the system. Then, we propose an intelligent method that combines a fuzzy control algorithm with its related control rules, aiming to monitor the speed of PMSM. This problem is solved by combining the two parameters of error and its variation. A fuzzy algorithm has proven to be an effective method to adjust the speed by suppressing disturbances. Furthermore, an adapted gain fuzzy controller, which provides a fast dynamic response without overshooting at various dynamic actions, has been suggested to compensate for all external disturbances. The obtained simulation results demonstrate the efficiency of the monitoring method for fault detection and localization and verify the performance of the adaptive algorithm control system.

Citation

ABDELGHAFOUR Herizi , fatimahamdibach@gmail.com, , (2023-04-01), Intelligent monitoring of PMSM based on adaptive fuzzy logic for diagnosis, Przegląd Elektrotechniczny, Vol:99, Issue:4, pages:241-246, F Z. Hamdi pacha

The main idea of this work is to exploit the "BACKSTEPPING" technique based on Lyapunov’s theory for the control of nonlinear systems. This approach consists of constructively designing a control law for nonlinear systems by considering some state variables as being virtual controls, and designing intermediate control laws for them. Some internal variables are sometimes inaccessible to measurement or expensive to measure, hence the introduction of observers based on the same principle. Finally, an application of this approach on a multi-input / multi-output nonlinear system, represented by an induction motor, was made. This procedure makes it possible to obtain in an instructive way a control law which ensures the stability of the closed loop system by presenting remarkable dynamic performances as well as a good robustness vis-à-vis the deviations of the parameters of the motor.

Citation

ABDELGHAFOUR Herizi , ,(2023-01-17), Backstepping Control for Induction Motor,3rd International Conference on Engineering and Applied Natural Sciences,Konya, Turkey

In this document, we will present a control technique called control by type-1 fuzzy logic, this control makes it possible to instantly keep independent control of the active and reactive powers generated by doubly fed induction generator (DFIG) in a wind energy production system coupled to the grid. This resulted in a high yield and optimum production quality. In the first part we presented the individual modeling of the wind chain that is composed of a DFIG driven by a turbine with variable pitch of the blades to control the capture of energy from the wind during its low and high speeds. This machine is directly coupled to the grid by the stator and controlled by the rotor quantities through two bidirectional PWM converters. The main function of these converters is the connection of the wind generator to the power grid in two different ways: one on the grid side converter which will allow continuous bus control and improve the power factor on the grid side; the other, on the rotor side converter which will allow the application of our control technique to control and optimize the energy flow generated by the stator of our machine in our system. Finally, we will present the results of simulations which show the effectiveness of this command.

Citation

ABDELGHAFOUR Herizi , ,(2022-12-23), Active and Reactive Powers Control of Doubly Fed Induction Generator using Interval Type-1 Fuzzy Controller,1st International Conference on Engineering, Natural and Social Sciences,Konya, Turkey

The main purpose of this paper is to exploit the "BACKSTEPPING" technique based on the Lyapunov theory for non-linear multi-input / multi-output system control, represented by a doubly fed induction machine. This approach consists of constructively designing a control law for nonlinear systems by considering some state variables as virtual controls, and designing them intermediate control laws. The Backstepping control makes it possible to obtain informatively a control law which ensures the stability of the closed-loop system by presenting remarkable dynamic performances as well as a good robustness with respect to the deviations of the parameters of the engine.

Citation

ABDELGHAFOUR Herizi , ,(2022-12-23), Backstepping Control based on Lyapunov Theory for Doubly-Fed Induction Machine,1st International Conference on Engineering, Natural and Social Sciences,Konya, Turkey

In this work, we develop a new hybrid algorithm between two control techniques namely: sliding mode control and fuzzy logic control to instantly keep an independent, precise and continuous control of mechanical power (speed, torque) produced by the permanent magnet synchronous machine and to improve tracking qualities with zero static error and to ensure robustness with guaranteed stability. This resulted in a high yield and optimum production quality. In the first part we presented the modeling of this machine and their PWM bidirectional converters. The main function of these converters is the connection of the machine to the electrical grid in two different ways: one on the grid side converter which will allow continuous bus control and improve the power factor on the grid side; the other, on the converter on the stator side which will allow the control and optimization of the mechanical energy flow generated by this machine. To do this, we will develop the fuzzy sliding hybrid control based on estimated gains and fuzzy regulators to eliminate the chattering phenomenon, the disadvantage of the sliding control, and converge these errors toward zero and thus ensure the stability of this machine. the disadvantage of fuzzy logic control. The numerical simulation results obtained during the application of the fuzzy sliding hybrid control on our machine show the effectiveness of this implemented control.

Citation

ABDELGHAFOUR Herizi , ,(2022-12-13), Hybrid Sliding-fuzzy type 1 control of a permanent magnet synchronous machine (PMSM),1st International Conference on Scientific and Academic Research,Konya, Turkey

Nowadays, several works have been oriented towards the study of the doubly-fed induction motor "DFIM", which is a three-phase asynchronous machine with a wound rotor supplied by two voltage sources, one at the stator and the other at the rotor. The latter and thanks to the development of power electronics equipment and the appearance of modern control techniques present an ideal solution for high power and variable speed drives. The control of this motor is a delicate operation because this motor is characterized by a nonlinear dynamic, with time-varying parameters and with a strong coupling between the magnetic behavior and the mechanical part. To this end, for a long time, significant efforts have been made to develop highperformance controls to control the dynamic behavior of this motor. Fuzzy logic is an important development registered during the last two decades. This makes it possible to obtain an adjustment law that is often very effective without having to carry out in-depth modeling. As opposed to a standard regulator or a state feedback regulator, the fuzzy logic regulator does not deal with a well-defined mathematical relation, but uses inferences with several rules, based on linguistic variables. We propose in this work an association combining the type-2 fuzzy logic with the oriented stator flux vector control of DFIM to achieve a more efficient control by taking advantage of the advantages offered by each of them these techniques.

Citation

ABDELGHAFOUR Herizi , ,(2022-12-13), Speed Control of Doubly Fed Induction Motor using Interval Type-2 Fuzzy Controller,1st International Conference on Scientific and Academic Research,Konya, Turkey

In this work is developed a control algorithm is called the 2nd order sliding mode control known for its simplicity and robustness on a WPCS based on a DFIG to keep instantaneous independent, accurate and continuous control of active and reactive power generated by our system and improve the tracking qualities with zero static error and ensure robustness with a guaranteeing stability. This allowed obtaining a high efficiency and an optimal production quality. In the first part we presented the modeling of the wind chain that is composed of a DFIG driven by a turbine with variable blade pitch to control the energy capture of the wind during its low and high speeds. This machine is coupled directly to the grid through the stator and driven by the rotor values through two bi-directional PWM converters. The main function of these converters is the connection of the wind generator to the grid in two different ways: one on the grid side converter that will allow the control of the DC bus and improve the power factor on the grid side; the other on the rotor side converter that will allow the application of our control technique to the control and optimization of the energy flow generated by the stator. To do this, we will develop the sliding control of order 2 based on estimated gains of order 2 to eliminate the phenomenon of chattering, and converge these errors to zero and thus ensure the stability of our system control.

Citation

ABDELGHAFOUR Herizi , ,(2022-11-13), Second order sliding mode control of a wind energy conversion system based on a double fed asynchronous machine,4th International Conference on Applied Engineering and Natural Sciences,Konya, Turkey

This paper presents a comparative study of sliding mode control, hybrid sliding type-1 fuzzy logic and hybrid sliding type-2 fuzzy logic applied on the permanent magnet synchronous machine (PMSM). We used different criteria in this comparison: qualitative, quantitative and robust during the transient and permanent operation of the system. In this article, we present a new sliding mode control strategy applied to the PMSM, this control combines sliding mode and fuzzy logic (type-1 and type-2) to find robust control. The control proposed keeping the part of the equivalent control by sliding mode and will change the part of the switching by a fuzzy controller. Simulation results with a sliding mode control, type-1 fuzzy logic controller (T1FLC) and with an interval type-2 fuzzy logic controller (IT2FLC) of a permanent magnet synchronous machine are presented. The advantage of using interval type-2 fuzzy logic controller is verified.

Citation

RIYADH Rouabhi , ABDELGHAFOUR Herizi , , (2022-11-03), Comparative study of the performance of a sliding, sliding-fuzzy type 1 and a sliding-fuzzy type 2 control of a permanent magnet synchronous machine, Przegląd Elektrotechniczny, Vol:98, Issue:11, pages:21-29, A. Herizi

In this work is developed a hybrid algorithm enter two control techniques namely: sliding mode and fuzzy logic to keep instantaneous, independent, accurate and continuous control of active and reactive power generated by WECS based on a doubly fed induction generator (DFIG) and improve the tracking qualities with zero static error and ensure robustness with a guarantee stability. This allowed obtaining a high efficiency and an optimal production quality. In the first part we presented the individual modeling of the wind chain that is composed of a DFIG driven by a turbine with variable blade pitch to control the energy capture of the wind during its low and high speeds. This machine is coupled directly to the grid through the stator and driven by the rotor magnitudes through two bi-directional PWM converters. The main function of these converters is the connection of the wind generator to the grid in two different ways: one on the grid side converter that will allow the DC bus control and improve the power factor on the grid side; the other on the rotor side converter that will allow the control and optimization of the energy flow generated by the stator of our system. To do this, we will develop the hybrid fuzzy sliding control based on estimated gains and fuzzy controllers to eliminate the phenomenon of chattering the disadvantage of the sliding control, and converge these errors to zero and thus ensure the stability of the system the disadvantage of the fuzzy logic control.

Citation

ABDELGHAFOUR Herizi , ,(2022-10-27), Hybrid fuzzy sliding mode control of the power generated by wind energy conversion system (WECS) based of a doubly fed induction generator (DFIG),1st International conference on renewable materials and energies,Ouargla, Algeria

In this work, we present a new comparative study between two control techniques, namely vector control and fuzzy logic control, in order to highlight the efficiency and robustness of each of them, this study is based on three essential criteria: qualitative, quantitative and robustness carried out during the transient and permanent operations of our wind energy conversion system which is based on a double fed induction generator driven by a turbine with variable blade pitch, and controlled through the rotor variables by two bidirectional converters. In the first part we presented the individual modeling of the wind chain, then we presented and developed the commands necessary to control the active and reactive powers produced by this system. Finally, we were interested in the comparative study between the proposed commands. The results obtained show that fuzzy logic control is the most efficient and effective control on the wind energy conversion system considered compared to vector control, namely: Qualitative comparison: This comparison is based on the observation of simulation results obtained by applying the two commands developed on our system. The proposed active and reactive power setpoints are given in the form of steps while the generator is driven at a fixed speed. The observation of the simulation results shows that the two powers follow their new references in the two types of controls; however, the response time, overshoot and oscillations of the controlled quantities, as well as the exponential convergence of the errors for the transient state and the change of the setpoints are different. It is noted that the best values of the latter are the values obtained during the application of the fuzzy logic control , which can be considered as the most efficient control compared to the vector control. Quantitative comparison: The target of this test is to compare the two controls quantitatively (in numbers); to highlight the performance of each of them. The valuesof the static error J1 and that of the necessary command J2 are calculated in the time interval [0s 5s]. The simulation results presented clearly show that fuzzy logic control is the most efficient from the point of view of minimizing the energy criterion which gives us the lowest values (J1 = 3.3360e+007 for the active power, and J1 = 2.2705 e+007 for the reactive power), on the other hand the vector control which gives us the values (J1 = 2.8944e+008 for the active power, and J1 = 1.6288e+008 for the reactive power). Concerning the second precision criterion, we note that it is the fuzzy logic control which gives the lowest values (J2 = 5.0687e+004 for the active power, and J2 = 7.6097e+005 for the reactive power) on the other hand the vector control which gives us the values(J2 = 4.0734e+005 for the active power, and J2 = 7.6095e+006 for the reactive power). Robustness comparison: In this test, we visualized the shape of the two active and reactive powers for a simulation duration Ts=5s. The two proposed controls present a high robustness and ensure good performance even in the presence of small parametric variations with external disturbances; however, control by fuzzy logic presents as the best control having almost smooth power shapes and a good followup of the setpoint shapes, on the other hand vector control which gives us remarkable ripples.

Citation

ABDELGHAFOUR Herizi , ,(2022-07-23), Comparative study between vector control and fuzzy logic applied on a wind energy conversion system based on a double fed induction generator,3rd International Conference on Applied Engineering and Natural Sciences,Konya, Turkey

This paper focuses on the diagnosis of electrical faults in electrical drives based on the permanent magnet synchronous machine (PMSM) which is supplied by a system of voltages delivered by a voltage inverter, this is controlled by the hysteresis strategy with three reference currents. High current or cut-off can cause problems for three-phase equipment and the most common impact of these faults is overheating of the equipment and consequently degradation of electrical insulation and reduction of service life. A modeling of the system performance in the healthy and faulty machine cases has been simulated. In this paper, firstly, the system is analyzed for the different supply current faults of types: unbalance and current break. Then, the fault detection of the permanent magnet synchronous machine can be illustrated by the evolution of the parameters that describe the electrical and mechanical characteristics of the machine. The results of the simulation are realized by Simulink MATLAB.

Citation

ABDELGHAFOUR Herizi , ,(2022-03-25), Design and Diagnosis of current faults in electrical power systems of permanant magnet synchrones machine,5Th International Conference on Advanced Systems and Emergent Technologies,Méhari Hammamet Hotel, Tunisia

Les machines asynchrones sont les plus utilisées dans les secteurs industriels en raison liée au faible coût, à la masse réduit, à la robustesse, à la construction simple et à un minimum d’entretien, bien que celles-ci imposent des structures internes et des stratégies de commande plus complexes. De nos jours, plusieurs travaux ont été orientés vers l'étude de la machine asynchrone à double alimentation "MADA", qui est une machine asynchrone triphasée à rotor bobiné alimentée par deux sources de tension l’un au stator et l’autre au rotor. L’histoire de la commande des machines asynchrones a commencé en Allemagne au début des années soixante-dix avec la proposition de la théorie d’orientation du champ par Blaschke. Cette théorie a permis de résoudre le problème du découplage, par conséquent, il est devenu possible de commander séparément le flux et la vitesse (couple). Toutefois, malgré l’amélioration apportée par cette commande, certains inconvénients ont limité son utilisation dans les applications de hautes performances. En effet, elle ne peut réaliser qu’un découplage asymptotique autour d’un flux constant. En plus, l’établissement de cette commande utilise des régulateurs PI qui nécessitent une parfaite connaissance du modèle du système à régler et qui présentent une grande sensibilité aux variations paramétriques, notamment à la variation de la résistance rotorique qui a une relation directe avec l’angle d’orientation du flux. De tels inconvénients ont poussé les chercheurs vers le développement des techniques de commande non linéaire, on peut distinguer de manière non exhaustive la commande par backstepping. Elle a été développée par M. Krstic et P. V. Kokotovic, ont introduit des méthodes utilisant des changements de variables récursifs appelés backstepping, sur des classes de systèmes triangulaires non linéaires paramétrés. De façon générale, les lois des commandes proposées, satisfont de bonnes propriétés de robustesse et d'atténuation de perturbations, mais ne s'appliquent qu'à des classes restreintes de systèmes et n'utilisent que des contrôleurs statiques. D’autre part, un important développement a été enregistré pendant les deux dernières décennies. En effet, l’apparition de nouvelles techniques, telles que : la logique floue, les réseaux de neurones, les algorithmes génétiques et d’autres, a permis de former une nouvelle discipline appelée intelligence artificielle. La logique floue est l’une des branches importantes de l’intelligence artificielle. Les bases théoriques de cette logique ont été établies en 1965 par le professeur Lotfi Zadeh à l’université de Berekley en Californie, qui introduit la notion de l’ensemble flou. Celle-ci permet d’obtenir une loi de réglage souvent très efficace sans devoir faire des modélisations approfondies. À la lumière de ce qui a été dit, nous proposons dans ce travail une association combinant la logique floue avec la commande par backstepping pour la commande de la MADA. Cette association sera exploitée pour établir de nouvelle commande robuste, à base de la logique floue, en vue d’améliorer les réponses dynamiques du moteur asynchrone à double alimentation. La commande proposée est conçue à partir de la commande par Backstepping (basée sur le principe de l'orientation du flux statorique dans le repère 𝑑,) complété par un contrôleur flou du type 1 pour améliorer la robustesse. En utilisant la théorie de stabilité de Lyapunov, on montre que les dynamiques de poursuite de trajectoire sont asymptotiquement stables. Cette technique consiste à remplacer les gains des régulations de la commande par backsteppnig par des contrôleurs flous du type 1 à une entrée est l’erreur entre la valeur mesurée et la valeur de référence.

Citation

ABDELGHAFOUR Herizi , ,(2022-02-19), Hybrid Control Using Fuzzy-Backstepping Control of a Doubly Fed Induction Motor,1st International Conference on Modern Electrical Engineering and Technology,Souk Ahras, Algeria

The efficiency of a wind turbine depends primarily on the power of the wind, the power curve of the turbine and the ability of the generator to respond to fluctuations in the wind. This article then proposes a robust control strategy of the doubly-fed induction generator applied in the wind energy conversion system, the active and reactive powers, which are generated by the DFIG will be decoupled by the orientation of the stator flux. The proposed control is combined between sliding mode control and type-2 fuzzy logic, this technique is robust to the modeling uncertainties of the generator and the wind generator, and which makes it possible to optimize energy production (efficiency). Finally, the performance of the system was tested and compared by simulation in terms of follow-up of instructions and the robustness with respect to the parameter variations of the DFIG. The results obtained show the interest of such a control in this system.

Citation

ABDELGHAFOUR Herizi , , (2022-01-10), Hybrid Control Using Sliding Mode Control with Interval Type-2 Fuzzy Controller of a Doubly Fed Induction Generator for Wind Energy Conversion, International Journal of Intelligent Engineering and Systems, Vol:15, Issue:1, pages:549-562, A. Herizi

La matière a pour objectif de maîtriser les outils de représentation graphiques des systèmes automatisés (GRAFCET), installer et entretenir des éléments d’automatismes industriels, effectuer la programmation et la configuration des automates programmables.

Citation

ABDELGHAFOURHerizi , ,(2021-05-25); Automatismes industriels,University of M'sila,

In this article we present the vector control of the doubly fed induction machine (DFIM) fed by a PWM inverter. The oriented stator flux vector control is efficient because of the simplicity of design and implementation and allows a natural decoupling between flows and currents. The application of this strategy is achieved by using Proportional Integral (PI) Controllers. The parameters of these controllers are calculated directly from the parameters of the machine using conventional analytical methods, which require careful calculation and a good knowledge of all machine parameters. The aim of our study is to try to replace the controller (PI) for speed and flux by a fuzzy logic controller type 1. Robustness tests of the control vis-à-vis the parametric variations of the machine will be made.

Citation

RIYADH Rouabhi , ABDELGHAFOUR Herizi , , (2021-03-01), Hybrid Fuzzy-Vector Control of a Doubly Fed Induction Machine, Algerian Journal of Engineering Architecture and Urbanism, Vol:5, Issue:3, pages:657-666, A. Herizi

In this article, we present a new sliding mode control strategy applied to the doubly fed induction machine. The proposed control combines sliding mode and fuzzy logic to achieve robust control. This technique finds its strongest justification for the problem of using a nonlinear control law robust to the uncertainties of the model. The objective of this control is improved the outputs generated by the doubly fed induction machine supply decoupled by orientation of the stator flux. Finally, the performance of the system was tested and compared by simulation in terms of follow-up of instructions, and the robustness with respect to the parametric variations of this machine. The simulation results obtained clearly show the effectiveness of this control.

Citation

ABDELGHAFOUR Herizi , ,(2021), Hybrid Control Using Fuzzy Sliding Mode Control of Doubly Fed Induction Machine,1st International Conference on Electronics, Artificial intelligence and New Technologies,Oum El Bouaghi, Algeria

In this paper, we present a new hybrid control strategy applied to the doubly fed induction generator (DFIG) used in wind energy conversion systems (WECS) is presented. The main objective of the study is to derive a control strategy which will be applied to a bidirectional converter supplying a DFIG based on the combination of sliding mode control and the fuzzy logic. This technique finds its strongest justification to the problem of using a nonlinear control robust to the uncertainties of the model. Initially, the sliding mode control was carried out which makes it possible to independently control the active and reactive power produced by the DFIG and injected in the main grid according to the power references derived from turbine’s mechanical power and the grid operator. Then, in order to improve the results, another technique will be introduced is the hybrid control between the sliding mode control and fuzzy logic (FSMC). This technique is based on the cascade control structure which combines two parts, the first is the equivalent control part (SMC) and the other is the fuzzy control part (FLC). Finally, a comparative study will be presented between the proposed control strategy and the classic sliding control according to the robustness with respect to the parameter variations of the machine, the integral square error and the integral absolute error. The results clearly show the superiority of the proposed control compared to the sliding mode control.

Citation

ABDELGHAFOUR Herizi , ,(2021), Hybrid Fuzzy-Sliding Mode Control of a Doubly Fed Wind Energy Induction Generator,1st International Conference on Sustainable Energy and Advanced Materials,Ouargla, Algeria

In this article we present the vector control of the doubly fed induction machine (DFIM) fed by a PWM inverter. The oriented stator flux vector control is efficient because of the simplicity of design and implementation and allows a natural decoupling between flows and currents. The application of this strategy is achieved by using Proportional Integral (PI) Controllers. The parameters of these controllers are calculated directly from the parameters of the machine using conventional analytical methods, which require careful calculation and a good knowledge of all machine parameters. The aim of our study is to try to replace the controller (PI) for speed and flux by a fuzzy logic controller type 1. Robustness tests of the control vis-à-vis the parametric variations of the machine will be made.

Citation

ABDELGHAFOUR Herizi , ,(2021), Hybrid Fuzzy-Vector Control of a Doubly Fed Induction Machine,Séminaire International sur L’industrie et la Technologie,Oran, Algerie

In this article we present the vector control of the doubly fed induction machine (DFIM) fed by a PWM inverter. The oriented stator flux vector control is efficient because of the simplicity of design and implementation and allows a natural decoupling between flows and currents. The application of this strategy is achieved by using Proportional Integral (PI) Controllers. The parameters of these controllers are calculated directly from the parameters of the machine using conventional analytical methods, which require careful calculation and a good knowledge of all machine parameters. The aim of our study is to try to replace the controller (PI) for speed and flux by a fuzzy logic controller type 1. Robustness tests of the control vis-à-vis the parametric variations of the machine will be made.

Citation

RIYADH Rouabhi , ABDELGHAFOUR Herizi , ,(2021), Hybrid Fuzzy-Vector Control of a Doubly Fed Induction Machine,Séminaire International sur L’industrie et la Technologie, organisé par Algerian Journal of Engineering, Architecture and Urbanism,Oran, Algerie

In this article, we present a new sliding mode control strategy applied to the doubly fed induction machine. The proposed control combines sliding mode and fuzzy logic to achieve robust control. This technique finds its strongest justification for the problem of using a nonlinear control law robust to the uncertainties of the model. The objective of this control is improved the outputs generated by the doubly fed induction machine supply decoupled by orientation of the stator flux. Finally, the performance of the system was tested and compared by simulation in terms of follow-up of instructions, and the robustness with respect to the parametric variations of this machine. The simulation results obtained clearly show the effectiveness of this control.

Citation

RIYADH Rouabhi , ABDELGHAFOUR Herizi , ,(2021), Hybrid Control Using Fuzzy Sliding Mode Control of Doubly Fed Induction Machine,1st International Conference on Electronics, Artificial intelligence and New Technologies, Oum El Bouaghi, Algeria,Oum El Bouaghi, Algeria

The work carried out in this article concerns the modeling and the control of a wind energy production system based on an doubly-fed induction generator driven by a constant speed, and controlled through the rotor variables by a bidirectional converter called the inverter. we modeled the wind chain separately to control the powers generated by this system, we used the type-2 fuzzy logic control based on type-2 fuzzy regulators in order to improve the quality of tracking of the electrical power produced and always d 'ensure the robustness of the system.

Citation

ABDELGHAFOUR Herizi , ,(2020), Type 2 Fuzzy Logic Control of the Doubly Fed Induction Generator Wind Turbine,8th International Renewable and Sustainable Energy Conference,Morocco

In this paper, we present another strategy for the vector control of the doubly fed induction motor (DFIM) .The vector control with stator-oriented flux is efficient because of the simplicity of design and implementation and allows to have a natural decoupling between flows and currents. This command is carried out using Integral Proportional Controllers (PI); the parameters of these controllers are calculated directly from the parameters of the machine using conventional analytical methods, which require careful calculation and familiarity with all machine parameters. The aim of our study is to try to replace controllers (PI) with controllers based on type 2 fuzzy logic in order to obtain robust control. Robustness tests of the control for the parameter variations of the machine will be made.

Citation

ABDELGHAFOUR Herizi , ,(2020), Type-2 Sugeno fuzzy logic inference system for speed control of a doubly-fed induction motor,1st International Conference on Digitization and its Applications,M’sila university, Algeria

The aim of this work concerns the study, modeling and control of a wind energy conversion system based on a doubly-fed induction generator (DFIG) driven by a constant speed and controlled by the rotor quantities through two converters bidirectional. For this, a modeling of the various components of this system was carried out. These models were used to develop a control technique called type 2 fuzzy logic controls to ensure precise and continuous control of the stator powers generated while ensuring stability and speed of tracking with zero static error. This resulted in high system efficiency and optimum production quality.

Citation

RIYADH Rouabhi , ABDELGHAFOUR Herizi , ,(2020), Type-2 fuzzy logic control of the doubly fed induction generator wind turbine,IRSEC20,Morocco

In this article, we present a comparative study between two control techniques applied on the Permanent Magnet Synchronous Machine (PMSM), namely vector control and fuzzy logic. This comparison is based on three criteria: qualitative, quantitative and robust during the transient and permanent operation of the system. The latter comprises a machine is driven through the stator variables by two bidirectional converters. In the first part, we have presented the individual modeling of the global chain (PMSM, Inverter, and Rectifier). Then we presented and developed the two commands techniques to control the speed and the torque produced by this machine. The results of this study made it possible to evaluate the performance of these controls.

Citation

ABDELGHAFOUR Herizi , , (2019-12-01), Comparative Study Between Two Control Techniques Applied on the Permanent Magnet Synchronous Machine (PMSM), Advances in Modelling and Analysis C, Vol:74, Issue:2, pages:87-94, R. Rouabhi

In this paper, we present a new sliding mode control strategy applied to the doubly fed induction machine, this control combines sliding mode and type-2 fuzzy logic to find robust control. The proposed control kept the part of the equivalent control by sliding mode and will change the part of the switching by a type-2 fuzzy controller has an input is the error between the measured value and the reference value. In this command we apply the orientation of the stator flux to have the decoupling between the flux and the current. The results obtained in simulation show the effectiveness of this command.

Citation

ABDELGHAFOUR Herizi , , (2019-12-01), Hybrid Type-2 Fuzzy Sliding Mode Control of a Doubly-Fed Induction Machine (DFIM), Advances in Modelling and Analysis C, Vol:74, Issue:2, pages:1-10, A. Herizi

In this article, we present a comparative study between two control techniques applied on the Permanent Magnet Synchronous Machine (PMSM), namely vector control and fuzzy logic. This comparison is based on three criteria: qualitative, quantitative and robust during the transient and permanent operation of the system. The latter comprises a machine is driven through the stator variables by two bidirectional converters. In the first part, we have presented the individual modeling of the global chain (PMSM, Inverter, and Rectifier). Then we presented and developed the two commands techniques to control the speed and the torque produced by this machine. The results of this study made it possible to evaluate the performance of these controls.

Citation

ABDELGHAFOUR Herizi , ,(2019), Fuzzy Logic and Vector Controls of the Permanent Magnet Synchonous Machine,The 5th International Conference on Mechanics and Energy,Monastir, Tunisie

In this article we present a comparative study between the two types of fuzzy logic mamdani and sugeno applied to the doubly-fed induction motor (DFIM). The proposed command combines the flow-oriented vector control and the type 1 fuzzy logic to get a robust control. The oriented stator flux vector control is efficient because of the simplicity of design and allows natural decoupling between flows and currents. The application of this strategy is carried out using Integral Proportional Controllers (PI) which are calculated directly from the machine parameters using conventional analytical methods which need a careful calculation and a good knowledge of all machine settings. The aim of our study is to try to replace the speed control controller (PI) with a type 1 fuzzy logic controller (mamdani or sugeno). Robustness tests of the control with respect to the parametric variations of the machine will be carried out.

Citation

ABDELGHAFOUR Herizi , ,(2019), Comparison Study Between Mamdani and Sugeno Fuzzy Inference Systems for Speed Control of a Doubly-Fed Induction Motor,8ème Conférence Internationale en Automatique & Traitement de Signal,Sousse, Tunisie

In this article we present the vector control of the doubly fed induction machine (DFIM) fed by a PWM inverter. The oriented stator flux vector control is efficient because of the simplicity of design and implementation and allows a natural decoupling between flows and currents. The application of this strategy is achieved by using Proportional Integral (PI) Controllers. The parameters of these controllers are calculated directly from the parameters of the machine using conventional analytical methods, which require careful calculation and a good knowledge of all machine parameters. The aim of our study is to try to replace the speed controller (PI) with a fuzzy logic controller type 1. Robustness tests of the control vis-à-vis the parametric variations of the machine will be made.

Citation

ABDELGHAFOUR Herizi , ,(2019), Speed control of a doubly-fed induction machine using fuzzy controller,The First International Conference on Materials, Environment, Mechanical and Industrial Systems,University of DJELFA, Algeria

In this article we present the vector control of the doubly fed induction machine (DFIM) fed by a PWM inverter. The oriented stator flux vector control is efficient because of the simplicity of design and implementation and allows a natural decoupling between flows and currents. The application of this strategy is achieved by using Proportional Integral (PI) Controllers. The parameters of these controllers are calculated directly from the parameters of the machine using conventional analytical methods, which require careful calculation and a good knowledge of all machine parameters. The aim of our study is to try to replace the speed controller (PI) with a fuzzy logic controller type 1. Robustness tests of the control vis-à-vis the parametric variations of the machine will be made.

Citation

RIYADH Rouabhi , ABDELGHAFOUR Herizi , ,(2019), Speed control of a doubly-fed induction machine using fuzzy controller,The First International Conference on Materials, Environment, Mechanical and Industrial Systems (ICMEMIS’19),University of DJELFA, Algeria

This paper presents the design of a new nonlinear control for the doubly fed induction machine (DFIM). The proposed control is based on a Backstepping type control technique supplemented by a type 1 fuzzy controller to improve its robustness. Using the Lyapunov stability theory, it is shown that trajectory tracking dynamics are asymptotically stable. In order to simplify the control, we apply the control by orientation of the stator flux which has the advantage of having a decoupling between the flow and the current. The simulation results show the quality of the proposed control despite parametric uncertainties.

Citation

ABDELGHAFOUR Herizi , , (2018-12-01), Backstepping control of a doubly-fed induction machine based on fuzzy controller, European Journal of Electrical Engineering, Vol:20, Issue:5, pages:645-657, A. Herizi

In engineering, the simulation is an effective and economical means commonly used to make preliminary studies and / or comparative, both in development (design), and during normal system operation. Currently, several simulation tools, including MATLAB / SimulinkTM are used in industry and in academia. In this work, we present the principle of modeling and simulation of an electrical machine: the asynchronous motor squirrel cage. The latter, thanks to the many benefits it provides over other types of electric motors, has become the engine of choice in industrial processes.

Citation

ABDELGHAFOUR Herizi , ,(2014), Modélisation et Simulation D’une Machine Asynchrone à Cage à L’aide Du Logiciel Matlab/Simulink,Premier Workshop sur la promotion des systèmes de sécurité dans les Zones Pétrolières et Gazières,Université de Ghardaïa

Cet article présente l’implémentation de l’algorithme RSA sur FPGA de la famille Virtex-2. En premier lieu, nous avons implémenté l’algorithme de la multiplication modulaire de Montgomery à deux CSAs et l’algorithme proposé par O. Nibouche. Ensuite nous avons apporté une amélioration de ce dernier par la modification de la multiplication classique par une multiplication basée sur le codage de Booth modifié. Cet algorithme modifié a permit d’améliorer les performances en débit. Finalement nous avons implémenté le chiffrement RSA pour les algorithmes sus cités sur un circuit reconfigurable FPGA.

Citation

ABDELGHAFOUR Herizi , ,(2011), Radix-4 Montgomery Modular Multiplication for the RSA Public-Key Cryptosystem,Journées Internationale d’Algèbre Appliquée,M’sila, Algeria

Cet article présente l’implémentation de l’algorithme RSA sur FPGA de la famille Virtex-2. En premier lieu, nous avons implémenté l’algorithme de Montgomery parallèle à deux CSA et l’algorithme qui basé sur le calcul du complément à deux de la partie inférieur de la multiplication. Ensuite nous avons apporté une amélioration de ce dernier par une multiplication basée sur le codage de Booth modifié. Cet algorithme modifié a permit d’améliorer les performances en débit. Finalement nous avons implémenté l’algorithme RSA pour les différentes architectures de la multiplication de Montgomery.

Citation

ABDELGHAFOUR Herizi , ,(2011), A New Architecture for Radix-4 Montgomery Modular Multiplication,1st International Conference on Automation and Mechatronics,Oran, Algeria

Cet article présente l’implémentation de l’algorithme RSA sur FPGA de la famille Virtex-2. En premier lieu, nous avons implémenté l’algorithme de la multiplication modulaire de Montgomery à deux CSAs et l’algorithme proposé par O. Nibouche. Ensuite nous avons apporté une amélioration de ce dernier par la modification de la multiplication classique par une multiplication en base 4. Cet algorithme modifié a permit d’améliorer les performances en débit. Finalement nous avons implémenté le chiffrement RSA pour les algorithmes sus cités sur un circuit reconfigurable FPGA.

Citation

ABDELGHAFOUR Herizi , ,(2009), A New Radix-4 Montgomery Modular Multiplication for RSA Cryptosystem,6éme Conférence sur le Génie Electrique,Ecole Militaire Polytechnique

This paper presents an implementation of various algorithms about Montgomery multiplication on a FPGA (Virtex-2 family). First, we have implemented the Montgomery algorithm with two CSAs and the modified algorithm of O. Nibouche in parallel and serial. After that, we have introduced a modification on Montgomery multiplication by introducing a modified Booth recoding. The modified algorithm improves significantly the performance in Area/Time.

Citation

ABDELGHAFOUR Herizi , ,(2008), Implémentation de l'Algorithme de la Multiplication de Montgomery (Parallèle & Série),International Symposium on Operational Research,University of Science and Technology Houari Boumediene, Algeria

Cet article présente l’implémentation de l’algorithme RSA sur FPGA de la famille Virtex-2. En premier lieu, nous avons implémenté l’algorithme de la multiplication modulaire de Montgomery à deux CSAs et l’algorithme proposé par O. Nibouche. Ensuite nous avons apporté une amélioration de ce dernier par la modification de la multiplication classique par une multiplication en base 4. Cet algorithme modifié a permit d’améliorer les performances en débit. Finalement nous avons implémenté le chiffrement RSA pour les algorithmes sus cités sur un circuit reconfigurable FPGA.

Citation

ABDELGHAFOUR Herizi , ,(2008), Etude comparative de l'implémentation de Montgomery et du RSA sur FPGA,Séminaire sur les Systèmes de Détection "Architectures et Technologies",Commandement des Forces de Défense Aérienne du Territoire

Cet article présente l’implémentation de l’algorithme RSA sur FPGA de la famille Virtex-2. En premier lieu, nous avons implémenté l’algorithme de la multiplication modulaire de Montgomery à deux CSAs et l’algorithme proposé par O. Nibouche. Ensuite nous avons apporté une amélioration de ce dernier par la modification de la multiplication classique par une multiplication en base 4. Cet algorithme modifié a permit d’améliorer les performances en débit. Finalement nous avons implémenté le chiffrement RSA pour les algorithmes sus cités sur un circuit reconfigurable FPGA.

Citation

ABDELGHAFOUR Herizi , ,(2008), Nouvelle architecture d’implémentation de la multiplication de MONTGOMERY en base 4,Séminaire sur les systèmes numériques embarqués,Ecole Militaire Polytechnique

In this paper, a novel field-oriented induction motor drive using backstepping control design is presented. Backstepping control is proposed for replacing the existing PI controller to obtain high performance motion control systems, for the speed, flux and currents control loops. Stability analysis based on Lyapunov theory is also performed to guarantee the convergence of the speed tracking error from all possible initials conditions. Also, the computer simulations confirm that the proposed backstepping control scheme offers improved performance in terms of the trajectory tracking ability to time-varying reference input and robustness against parameters variation.

Citation

ABDELGHAFOUR Herizi , ,(2007), Lyapunov and Backstepping Control Design of induction Motor System,Fourth International Multi-Conference on Systems, Signals & Devices,Hammamet, Tunisia