MALIKA Fodil

Khezzari Dounya , Nebbatti Dounia

Commande vectorielle par backstepping de la machine asynchrone pentaphasée

Yahi Bouchra , Hamoudi Hadjer

Commande floue adaptative indirecte basée sur l’identification inverse appliquée sur la machine asynchrone pentaphasée

- CHERHABIL ABDELKARIM , SACI YASSINE

Réduction des ondulations de la vitesse d’un moteur polyphasé : utilisant la commande floue à gain adaptatif.

BEN HALIS, MOHAMED , FAR SAMIR

Application de la technique de linéarisation par retour d’état à la commande de la machine asynchrone pentaphasée

ZERKAOUI, Thabet , SAIDI, Noureddine

Comparaison des performances des régulateurs PI et flous appliques sur la machine pentaphasée

ABDELMOUNAIME, MECHIKI

COMMANDE DE LA MACHINE ASYNCHRONE POLYPHASEE

Saddam, Hadji

Logiciel de simulation des convertisseurs d’électronique de puissance

Ibrahim, Laghouag

Commande par logique floue type -2-appliquée à la machine asynchrone

ABDELBASET, DJAIDJA

Commande adaptative floue basée sur la minimisation d'erreur d’état

Hicham, DJOUKBALA

Commande adaptative floue basée sur la minimisation d'erreur filtrée appliqué à la « Machine asynchrone »

Daoud boussag

Commande adaptative floue appliquée à la machine asynchrone

Dahmani badisse

Commande par mode glissant flou appliquée à la machine asynchrone

Benselhoub Nadjet , x, x

Commande par mode glissant appliquée à la machine asynchrone

Djagham sabah

Commande par logique floue appliquée à la machine asynchrone

Multicarrier modulations have seen a great attention in recent years, especially Orthogonal Frequency Division Multiplexing (OFDM) which is widely employed in modern wireless communication systems. OFDM is often recognized by robustness against multipath channels and easiest implementation. Despite its adoption in many communication standard, OFDM suffers from several limitations, counting high out-of-band emissions (OOBE), and sensitivity to synchronization errors, and loss of spectral efficiency, owing to the cyclic prefix. Recent researches propose several waveforms in order to improve OFDM capabilities or as alternatives to OFDM, including Filter Bank Multicarrier (FBMC), Universal Filtered Multicarrier (UFMC), and Filtered-OFDM (F-OFDM). Among these multicarrier waveforms, F-OFDM has attracted important consideration since it is considered as an improvement of OFDM. The key issue of F-OFDM is apply sub-band filtering to OFDM signal, thus improves spectral confinement and reduces inter-band interference. This paper offers a comparative study of OFDM and F-OFDM in terms of spectral efficiency, Bit Error Rate (BER) and OOBE under severe channel conditions. Simulation results exhibits a significant reduction in out-of-band emissions whereas it maintain analogous Bit Error Rate (BER) performance to OFDM. F-OFDM offers similarly an improved spectral performance and ensure compatibility with existing OFDM-based systems. These enhancements in performance is at the cost of a moderate increase in implementation complexity. These results approve the suitability of F-OFDM as a promising development of OFDM, making it a robust candidate waveform for modern wireless communication systems.

Citation

MALIKA Fodil , ,(2026-01-18), Performance Evaluation of OFDM and Filtered-OFDM Waveforms for Wireless Communication Systems,4th International Conference on Pioneer and Innovative Studies,Konya, Turkey

Controlling asynchronous machines is complex because of the non-linearity of the model and the coupling between stator and rotor quantities. Thanks to advances in power electronics, decoupled control techniques have been developed to reproduce the performance of DC machines, while eliminating mechanical constraints. However, in the case of polyphase machines, these control strategies remain limited due of the harmonics generated by the inverter, which degrade power quality. To address this issue, a new fuzzy logic control strategy is proposed, aimed at reducing parasitic currents and improving dynamic performance in a five-phase asynchronous machine. A comparison between vector control using conventional PI and fuzzy PI is considered, based on the dynamic responses of speed, torque and harmonic distortion rate, especially under load variations and during rotational reversals. The simulation results obtained in MATLAB demonstrate a significant enhancement in speed stability and a reduction in ripples, confirming the effectiveness of the proposed approach. Keywords: Five-phase asynchronous machine, Vector control, Fuzzy logic, Speed oscillations, Automatic

Citation

MALIKA Fodil , Zohra ZERDOUMI , NEHED Zemouri , Fadila BENMEDDOUR , ,(2025-11-12), SPEED CONTROL OF THE PENTAPHASE ASYNCHRONOUS MACHINE : COMPARATIVE STUDY BETWEEN VECTOR CONTROL WITH CONVENTIONAL PI AND FUZZY PI",International Conference on Technology, Engineering and Science (IConTES),Antalya/Turkey.

Orthogonal Frequency Division Multiplexing (OFDM) technique has attracted major interest because of its robustness to time selective channels and its aptitude to accomplish high data rate. OFDM is the fundamental solution in 4G and 5G systems due to its simplicity of implementation and effectiveness in severe environments. Traditionally the Fast Fourier Transform (FFT) algorithm is adopted to implement OFDM transmitter. Discrete Wavelet Transform (DWT) is recognized as an improvement to Discrete Fourier Transform; therefore, many academics proposed it as alternative approach to FFT in OFDM transmission system. We propose to study the impact of DWT on the performance of the OFDM transmission system considering various modulation techniques and order in noisy and fading environments. We implement two approaches namely OFDM-FFT and OFDM-DWT, their performances respective are studied and compared. Through simulation examples, we notice the improvements obtained by performing the wavelet transform. The wavelet-based OFDM techniques perform better than OFDM-FFT. The results obtained demonstrate the improvements achieved by adopting the wavelet transform relatively to the FFT for all evaluation metrics used. OFDM-DWT cancels interferences, as we can learn from constellation diagrams, where symbols are delimited in their original zones. OFDM-DWT performs the lowest bit error rate (BER) and a reduced Complementary Cumulative Distribution Function (CCDF) of the Peak to Average Power Ratio (PAPR).

Citation

MALIKA Fodil , ,(2025-11-12), ENHANCING OFDM PERFORMANCES USING WAVELET TRANSFORM TECHNIQUES IN WIRELESS SYSTEMS,International Conference on Technology, Engineering and Science (IConTES),Antalya/Turkey.

Abstract: Orthogonal Frequency Division Multiplexing (OFDM) technique has attracted major interest because of its robustness to time selective channels and its aptitude to accomplish high data rate. OFDM is the fundamental solution in 4G and 5G systems due to its simplicity of implementation and effectiveness in severe environments. Traditionally the Fast Fourier Transform (FFT) algorithm is adopted to implement OFDM transmitter. Discrete Wavelet Transform (DWT) is recognized as an improvement to Discrete Fourier Transform; therefore, many academics proposed it as alternative approach to FFT in OFDM transmission system. We propose to study the impact of DWT on the performance of the OFDM transmission system considering various modulation techniques and order in noisy and fading environments. We implement two approaches namely OFDM-FFT and OFDMDWT, their performances respective are studied and compared. Through simulation examples, we notice the improvements obtained by performing the wavelet transform. The wavelet-based OFDM techniques perform better than OFDM-FFT. The results obtained demonstrate the improvements achieved by adopting the wavelet transform relatively to the FFT for all evaluation metrics used. OFDM-DWT cancels interferences, as we can learn from constellation diagrams, where symbols are delimited in their original zones. OFDM-DWT performs the lowest bit error rate (BER) and a reduced Complementary Cumulative Distribution Function (CCDF) of the Peak to Average Power Ratio (PAPR). Keywords: Orthogonal frequency division multiplexing (OFDM), Discreet wavelet transform (DWT), Wireless communications, Fast fourier transform (FFT)

Citation

Zohra ZERDOUMI , MALIKA Fodil , Fadila BENMEDDOUR , Nacerddine BENTALEB, ,(2025-11-12), Enhancing OFDM Performance Using Wavelet Transform Techniques in Wireless Systems,International Conference on Technology, Engineering and Science (IConTES),Antalya/Turkey

Multiphase motors are increasingly used in high-performance industrial applications due to their improved efficiency, reliability and fault tolerance compared to traditional three-phase machines. However, one of the persistent challenges in their control is the presence of speed ripples, which can degrade performance, increase mechanical stress and reduce system life time. This paper proposes a control strategy based on adaptive gain fuzzy logic applied to the vector control of a five-phase motor. Unlike conventional fixed-gain controllers, this approach allows the controller gains to be dynamically adjusted according to the state of the system, thus increasing robustness to disturbances and load variations. Fuzzy logic enables the controller's behaviour to be modelled according to linguistic rules inspired by human expertise, making the system more responsive and intelligent. Simulation results obtained using Matlab show a significant improvement in speed stability and a marked reduction in ripples, confirming the effectiveness of the proposed method.. Keywords – PI- controller; five-phase asynchronous machine; fuzzy logic, speed oscillations.

Citation

Zohra ZERDOUMI , MALIKA Fodil , Fadila BENMEDDOUR , ,(2025-04-29), Reduction of Speed Ripples in a Polyphase Motor Using Adaptive Gain Fuzzy Control,4th International Conference on Scientific and Innovative Studies ICSIS 2025 April 29 – 30 in 2025 at Konya/Turkey.,Konya, Turkey

Abstract – The resonant frequency and bandwidth of a printed antenna can be modified by varying the physical parameters of the structure. The circular printed antenna with an air-gap proposed here enables these characteristics to be modified without having to design and build a new printed antenna. Its resonant frequency can be modified by adjusting the height of the air gap between the substrate of the radiating element and the ground plane. In addition, the presence of an air gap significantly increases the bandwidth of the a printed antenna. Our first step was to characterize the resonance and bandwidth of this type of antenna theoretically, using the integral equation technique, the moments method via the Galerkin procedure applicable for numerical resolution. To achieve this, the mode systems (TM, TE) derived from the cavity model were used as Chebyshev basis functions to present the current distribution on the conductive disk. Our results are in good agreement with the theoretical results previously published in the literature. In order to validate this study, practical realizations of this type of structure were carried out at the IUT de Chartres -Institut PRISME- to compare our results with real measurements. Good agreement was again found, confirming the interest of this type of antenna. Keywords – air-gap ; physical parameters ; Chebyshev Basis Functions ; Galerkin procedure; theoretical results

Citation

Zohra ZERDOUMI , MALIKA Fodil , Fadila BENMEDDOUR , ,(2025-04-29), Analysis of a Circular Printed Antenna With Air Gap Using Chebyshev Basis Functions,4th International Conference on Scientific and Innovative Studies ICSIS 2025 April 29 – 30 in 2025 at Konya/Turkey.,Konya, Turkey

– The resonant frequency and bandwidth of a printed antenna can be modified by varying the physical parameters of the structure. The circular printed antenna with an air-gap proposed here enables these characteristics to be modified without having to design and build a new printed antenna. Its resonant frequency can be modified by adjusting the height of the air gap between the substrate of the radiating element and the ground plane. In addition, the presence of an air gap significantly increases the bandwidth of the a printed antenna. Our first step was to characterize the resonance and bandwidth of this type of antenna theoretically, using the integral equation technique, the moments method via the Galerkin procedure applicable for numerical resolution. To achieve this, the mode systems (TM, TE) derived from the cavity model were used as Chebyshev basis functions to present the current distribution on the conductive disk. Our results are in good agreement with the theoretical results previously published in the literature. In order to validate this study, practical realizations of this type of structure were carried out at the IUT de Chartres -Institut PRISME- to compare our results with real measurements. Good agreement was again found, confirming the interest of this type of antenna.

Citation

MALIKA Fodil , ,(2025-04-29), Analysis of a Circular Printed Antenna With Air Gap Using Chebyshev Basis Functions,4th International Conference on Scientific and Innovative Studies ICSIS 2025,Konya/Turkey.

– Multiphase motors are increasingly used in high-performance industrial applications due to their improved efficiency, reliability and fault tolerance compared to traditional three-phase machines. However, one of the persistent challenges in their control is the presence of speed ripples, which can degrade performance, increase mechanical stress and reduce system life time. This paper proposes a control strategy based on adaptive gain fuzzy logic applied to the vector control of a five-phase motor. Unlike conventional fixed-gain controllers, this approach allows the controller gains to be dynamically adjusted according to the state of the system, thus increasing robustness to disturbances and load variations. Fuzzy logic enables the controller's behaviour to be modelled according to linguistic rules inspired by human expertise, making the system more responsive and intelligent. Simulation results obtained using Matlab show a significant improvement in speed stability and a marked reduction in ripples, confirming the effectiveness of the proposed method..

Citation

MALIKA Fodil , ,(2025-04-29), Reduction of Speed Ripples in a Polyphase Motor Using Adaptive Gain Fuzzy Control,4th International Conference on Scientific and Innovative Studies ICSIS 2025,Konya/Turkey

The need for high-speed wireless telecommunications services has renewed attention to multi-carrier modulation, more explicitly the Orthogonal Frequency Division multiplexing (OFDM). The excellent performance of the OFDM in mitigating multipath propagation allowed its integration in current and future telecommunication system. Fast Fourier Transform based OFDM is widely used in standards such as LTE and Wi-Fi, and DVB. The OFDM simplicity and robustness beside multipath fading and high transmission efficiency makes it an attractive technique. To further enhance the OFDM performances, Discreet Wavelet Transform (DWT) is adopted as alternative to the Fast Fourier Transform (FFT) in the modem. DWT-based OFDM is gaining more attention in academic research for its potential performance advantages. DWT-based OFDM is more resilient to interference and channel dispersion owed to its multi-resolution abilities and good localization in both time and frequency. FFT-based OFDM is more sensitive and depend on the Cyclic Prefix (CP) to handle such impairments. We propose an analyze of the impact of DWT on the OFDM transmission system. The simulations we carried out allowed us to highlight the improvements obtained by the OFDM-DWT in term of the Bit Error Rate (BER) and Signal-to-Noise Ratio (SNR), relatively to the OFDM-FFT. Among the wavelet types studied, the Haar wavelet provides the best performances.

Citation

MALIKA Fodil , ,(2025-04-29), Analysis of FFT and DWT Based OFDM Techniques for improving Wireless Communication Performance,4th International Conference on Scientific and Innovative Studies ICSIS 2025,Konya/Turkey.

Abstract – Multicarrier modulations have seen a great attention in recent years, especially Orthogonal Frequency Division Multiplexing (OFDM) which is widely employed in modern wireless communication systems. OFDM is often recognized by robustness against multipath channels and easiest implementation. Despite its adoption in many communication standard, OFDM suffers from several limitations, counting high out-of-band emissions (OOBE), and sensitivity to synchronization errors, and loss of spectral efficiency, owing to the cyclic prefix. Recent researches propose several waveforms in order to improve OFDM capabilities or as alternatives to OFDM, including Filter Bank Multicarrier (FBMC), Universal Filtered Multicarrier (UFMC), and FilteredOFDM (F-OFDM). Among these multicarrier waveforms, F-OFDM has attracted important consideration since it is considered as an improvement of OFDM. The key issue of F-OFDM is apply sub-band filtering to OFDM signal, thus improves spectral confinement and reduces inter-band interference. This paper offers a comparative study of OFDM and F-OFDM in terms of spectral efficiency, Bit Error Rate (BER) and OOBE under severe channel conditions. Simulation results exhibits a significant reduction in out-of-band emissions whereas it maintain analogous Bit Error Rate (BER) performance to OFDM. FOFDM offers similarly an improved spectral performance and ensure compatibility with existing OFDMbased systems. These enhancements in performance is at the cost of a moderate increase in implementation complexity. These results approve the suitability of F-OFDM as a promising development of OFDM, making it a robust candidate waveform for modern wireless communication systems. Keywords –Multicarrier modulatiom, OFDM, F-OFDM, Digital communications.

Citation

Zohra ZERDOUMI , MALIKA Fodil , Fadila BENMEDDOUR , ,(2025-04-29), Performance Evaluation of OFDM and Filtered-OFDM Waveforms for Wireless Communication Systems,4th International Conference on Scientific and Innovative Studies ICSIS 2025 April 29 – 30 in 2025,Konya, Turkey

Operation at low speed and high torque can lead to the generation of strong ripples in the speed, which can deteriorate the system. To reduce the speed oscillations when operating a five-phase asynchronous motor at low speed, in this article, we propose a control method based on Gray Wolf optimization (GWO) algorithms to adjust the parameters of proportional–integral (PI) controllers. Proportional–integral controllers are commonly used in control systems to regulate the speed and current of a motor. The controller parameters, such as the integral gain and proportional gain, can be adjusted to improve the control performance. Specifically, reducing the integral gain can help reduce the oscillations at low speeds. The proportional–integral controller is insensitive to parametric variations; however, when we employ a GWO optimization strategy based on PI controller parameters, and when we choose gains wisely, the system becomes more reliable. The obtained results show that the hybrid control of the five-phase induction motor (IM) offers high performance in the permanent and transient states. In addition, with this proposed strategy controller, disturbances do not affect motor performance.

Citation

MALIKA Fodil , ALI Djerioui , Mohamed LADJAL , HEMZA Mekki , SAMIR Zeghlache , Abdelhakim Saim, Fouad.Berrabah.@univ-msila.dz, Azeddine Houari, Mohamed Fouad Benkhoris, , (2023-05-18), Optimization of PI Controller Parameters by GWO Algorithm for Five-Phase Asynchronous Motor, Energies, Vol:16, Issue:10, pages:1-14, Licence MDPI, Basel, Switzerland

Today, as a result of significant progress in the area of control of electrical machines, new techniques and approaches have emerged. In order nonlinear or having non constant parameters systems, conventional control laws may be inadequate because some performance can not be guaranteed in the presence of structural variations or external disturbances. It is then necessary to synthesize robust controls with respect to these disturbances. It is in this context that we propose in this work a new command combines the study of adaptivity with the uncertainty that derives adaptive fuzzy controllers. This study presents the directadaptive fuzzy control stability extended, which uses the theory of approximation and the theory of Lyapunov to establish a parametric adaptation law ensuring the stability and boundedness of all the control signals and the tracking error. The obtained results show that direct adaptive fuzzy control stability extended has proved a great effectiveness and a strong robustness in the presence of parameter variations and disturbances.

Citation

MALIKA Fodil , Said BARKAT , , (2015-11-10), Commande floue adaptative directe stable étendue appliquée à la machine asynchrone, African Journals Online (AJOL), Vol:31, Issue:, pages:71-79, African Journals Online (AJOL)

The asynchronous machine currently holds a very important and ever-growing market thanks to its simplicity, robustness and low manufacturing cost. Despite these advantages, his command remains a more complex in comparison to the direct current machine, the use of fuzzy control is an interest having regard to its ability to treat the imprecision and uncertainty. If the variable dynamic systems impose the adjustment of the parameters of the controller and if the base of rules of order is difficult to build, the introduced of the adaptive techniques of control is necessary. Consequently, the combination of the study of adaptivity and uncertainty made it possible to derive the adaptive fuzzy controllers. In this context, several schemas of adaptive fuzzy controller have been proposed, among them the indirect adaptive fuzzy control In the indirect approach, the fuzzy systems are used to estimate the system dynamics and control law is obtained from the estimated. With through the obtained results, indirect adaptive fuzzy control based on the inverse identification has proved a great effectiveness and a strong robustness in the presence of parameter variations and disturbances.

Citation

MALIKA Fodil , ,(2014-11-10), Indirect Adaptive Fuzzy Control Based on the Inverse Identification applied to the asynchronous machine,Second World Conference on Complex Systems WCCS,Maroc

this paper presents an advanced direct adaptive fuzzy control for asynchronous machine which uses the theory of approximation and the theory of Lyapunov to establish a parametric adaptation law ensuring the stability and boundedness of all the control signals and the tracking error. In the direct approach, the fuzzy system is used to describe directly the control law and the parameters of the fuzzy system are directly adjusted to achieve the control objectives. Through the obtained results, stable direct adaptive fuzzy control generalized has proved a great effectiveness and a strong robustness in the presence of parameter variations and disturbances.

Citation

MALIKA Fodil , ,(2014), Novel approach to direct adaptive fuzzy control applied to the asynchronous machine,world symposium on méchatronics engineering § applied physics,Tunisie

The asynchronous machine, of which the simple structure makes industrial success, becomes terribly complex when it is a question of studying a powerful control of it. During the last decades the fuzzy logic control became a very important field of investigation and a lot of researchers are focused on. If the variable dynamic systems impose the adjustment of the parameters of the controller and if the base of rules of order is difficult to build, the introduced of the adaptive techniques of control is necessary. Consequently, the combination of the study of adaptivity and uncertainty made it possible to derive the adaptive fuzzy controllers. In this context, several schemas of adaptive fuzzy controller have been proposed, among them the direct adaptive fuzzy control stability extended or the study of stability is based on the Lyapunov approach. With through the obtained results, direct adaptive fuzzy control stability extended has proved a great effectiveness and a strong robustness in the presence of parameter variations and disturbances.

Citation

MALIKA Fodil , ,(2013-10-22), Commande floue adaptative directe stable étendue appliquée à la machine asynchrone,the first International Conference on Electrical Energy and Systems ICEES 2013,Annaba

La machine asynchrone, dont la structure simple fait le succès industriel, devient redoutablement complexe lorsqu’il s’agit d’en étudier une commande performante. Le recours à la commande par la logique floue trouve un intérêt important auprès des chercheurs, vu sa capacité de traiter l’imprécis, l’incertain et le vague. Si les systèmes dynamiques variables imposent l’ajustement des paramètres du régulateur et si la base de règles de commande est difficile à construire, les chercheurs ont introduit les techniques de commande adaptatives. Par conséquent, la combinaison de l’étude de l’adaptativité et de l’incertitude a permis de dériver les contrôleurs flous adaptatifs. Dans ce contexte, plusieurs schémas de commande floue adaptative ont été proposés, parmi eux la commande floue adaptative directe linéarisante ou l’étude de la stabilité est fondée sur l’approche de Lyapunov.

Citation

MALIKA Fodil , ,(2013), Commande floue adaptative directe linéarisante avec application,8eme Conférence sur le Génie Electrique(CGE08),alger