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Resilient Control for Networked Control Systems Subject to Cyber/Physical Attacks

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International Journal of Automation and computing 2018年第3期15卷 345-354页

作者： Taouba Rhouma Karim Chabir mohamed naceur abdelkrim Modeling Analysis and Control of Systems(MACS) Laboratory National Engineering School of Gabes (ENIG)University of Gabes

In this paper, we investigate a resilient control strategy for networked control systems（NCSs） subject to zero dynamic attacks which are stealthy false-data injection attacks that are designed so that they cannot be detected based on control input and measurement data. Cyber resilience represents the ability of systems or network architectures to continue providing their intended behavior during attack and recovery. When a cyber attack on the control signal of a networked control system is computed to remain undetectable from passive model-based fault detection and isolation schemes, we show that the consequence of a zero dynamic attack on the state variable of the plant is undetectable during attack but it becomes apparent after the end of the attack. A resilient linear quadratic Gaussian controller, having the ability to quickly recover the nominal behavior of the closed-loop system after the attack end, is designed by updating online the Kalman filter from information given by an active version of the generalized likelihood ratio detector.

关键词： Networked control systems (NCSs) cyber physical attacks Kahnan filtering resilient control anomaly detector.

Additive Fault Tolerant Control Applied to Delayed Singularly Perturbed System

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Journal of Software Engineering and Applications 2012年第4期5卷 217-224页

作者： Nouceyba abdelkrim Adel Tellili mohamed naceur abdelkrim Research Unit Modeling Analysis and Control Systems (MACS) Gabes Tunisia

The additive fault tolerant control (FTC) for delayed system is studied in this work. To design the additive control, two steps are necessary;the first one is the estimation of the sensor fault amplitude using a Luenberger observer with delay, and the second one consists to generate the additive fault tolerant control law and to add it to the nominal control of delayed system. The additive control law must be in function of fault term, then, in the absence of fault the expression of additive control equal to zero. The generation of nominal control law consist to determinate the state feedback gain by using the Lambert W method. Around all these control tools, we propose an extension of the additive FTC to delayed singularly perturbed systems (SPS). So, this extension consists to decompose the delayed SPS in two parts: delayed slow subsystem (delayed SS) and fast subsystem (FS) without time delay. Next, we consider that the delayed SPS is affected at its steady-state, and we apply the principal of FTC to the delayed SS and finally we combine them with the feedback gain control of FS by using the principal of composite control.

关键词： Additive Fault Tolerant Control Composite Control Lambert W Function Order Reduction Sensor Fault Singularly Perturbed System

Robust Adaptive FTC against Sensor Fault

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Computer Technology and Application 2012年第1期3卷 56-68页

作者： Amina Challouf Christophe Aubrun Adel Tellili mohamed naceur abdelkrim Unite de Recherche. Modelisation Analyse et Commande de Systemes （MACS） Ecole Nationale d＇Ingenieurs de Gabes （ENIG） Facultes des Sciences et Techniques Centre de Recherche en Automatique de Nancy （CRAN） Nancy-University CNRS UMR 7039 France Institute Superieure des Etudes Technologiques de Djerba （ISET） Universite de Gabes Gabes 6029 Tunisia

This paper addresses the problem of robust Fault-Tolerant （FT） design for large-scale systems. This particular class constitutes complex system which can be decomposed into N-interconnected subsystems. Special attention is paid to two different design architectures of an Active Fault-Tolerant Control （AFTC）. An AFTCS is characterized by an online Fault Detection and Isolation （FDI） process and a control reconfiguration mechanism. As the AFTC system offers the possibility to choose different controllers, the controller may be the most appropriate choice for the faulty situation and obtaining better performance. The goal of each adaptive controller is to accommodate sensor anomalies. Continuous, Linear and Time Invariant （LTI） complex system with faulty sensors and external disturbances is proposed. This study focuses on two different internal structures of the system. In this paper the direct adaptive method based on feedback controller design is applied both centralized and decentralized architectures. The controller gain is updated online using an adaptive law which takes into account the estimation of the faults and the disturbances. Then from the both classes of systems structures the adaptation controller performances, in terms of stability and fault effect rejection capability, are studied and compared. The proposed techniques are finally evaluated in the light of a simulation for a centralized interconnected system that can be decomposed into N-subsystems with some strong interconnections.

关键词： Adaptive control centralized control complex system decentralized control fault-tolerant control (FTC),N-Interconnected subsystems robust control sensor failure.

Ambient Intelligence: Awareness Context Application in Industrial Storage

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Wireless Sensor Network 2011年第4期3卷 135-146页

作者： Ahmed Zouinkhi Eddy Bajic Eric Rondeau mohamed Ben Gayed mohamed naceur abdelkrim 不详

WSNs are designed to efficiently collect data and monitor environments, among other applications. This article describes the concept and realization of an Active Security System for security management of warehousing of chemical substances using WSNs. We present an approach to modeling and simulating cooperation between intelligent products that are equipped with a platform of sensor networks and ambient communication capabilities to increase their security, in a context of ambient intelligence of a deposit for chemical substances. Behavior evolution of every intelligent product is modeled by hierarchical Petri Nets. The simulation of the model is implemented in the Castalia-OMNET++ Tools language.

关键词： Ambient Intelligence Intelligent Product Cooperation Security WSN Petri Nets Castalia

Additive Fault Tolerant Control Applied to Delayed Singularly Perturbed System

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Ambient Intelligence: Awareness context application in industrial storage

Journal of Software Engineering and Applications（软件工程与应用） 2012年第4期

作者： Nouceyba abdelkrim Adel Tellili mohamed naceur abdelkrim

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Potential risk of soil irrigation with treated wastewater over 40 years:a field experiment under semi-arid conditions in northeastern Tunisia

Wireless Sensor Network（无线传感网络） 2011年第4期

作者： Ahmed Zouinkhi Eddy Bajic Eric Rondeau mohamed Ben Gayed mohamed naceur abdelkrim

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Journal of Arid Land 2023年第4期15卷 407-423页

作者： Sarra HECHMI Samira MELKI mohamed-naceur KHELIL Rim GHRIB Moncef GUEDDARI naceur JEDIDI Water Research and Technology Center University of CarthageSoliman 8020Tunisia National Institute for Research in Rural Engineering Water and ForestryAriana 2080Tunisia Faculty of Sciences of Tunis University of Tunis El ManarTunis 2092Tunisia

In Tunisia,water scarcity is only adding pressure on water demand in *** the context of sustainable development goals,Tunisia has been reusing treated wastewater(TWW)as a renewable and inexpensive source for soil fertigation and groundwater(GW)***,major risks can be expected when the irrigation water is of poor *** study aims for evaluating the potential risk of TWW and GW irrigation on soil ***,we evaluated the suitability of water quality through the analysis of major and minor cations and anions,metallic trace elements(MTEs),and the sodium hazard by using the sodium adsorption ratio(SAR)and the soluble sodium percentage(SSP).The risk of soil sodicity was further assessed by SAR and the exchangeable sodium percentage(ESP).The degree of soil pollution caused by MTEs accumulation was evaluated using geoaccumulation index(Igeo)and pollution load index(PLI).Soil maps were generated using inverse spline interpolation in ArcGIS *** results show that both water samples(i.e.,TWW and GW)are suitable for soil irrigation in terms of salinity(electrical conductivity5.00),followed by Ni^(2+)and Pb^(2+).Nevertheless,Cd^(2+)presents the lowest risk of soil pollution(Igeo50.0%).This study shows that the use of imagery tools,such as ArcGIS,can

关键词： treated wastewater metallic trace elements(MTEs) pollution indices sodium adsorption ratio(SAR) geoaccumulation index(Igeo) Tunisia

Effect of sintering temperature on microstructure and electrical properties of Sr_(1-x)(Na_(0.5)Bi_(0.5))_(x)Bi_(2)Nb_(2)O_(9) solid solutions

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Journal of Advanced Ceramics 2014年第1期3卷 17-30页

作者： Hana naceur Adel MEGRICHE mohamed EL MAAOUI Laboratory of Applied Mineral Chemistry Department of ChemistryFaculty of SciencesUniversity Tunis ElManarCampus 2092TunisTunisia

In this study,we investigated the effect of sintering temperature on densification,grain size,conductivity and dielectric properties of Sr_(1-x)(Na_(0.5)Bi_(0.5))_(x)Bi_(2)Nb_(2)O_(9) ceramics,prepared by hydrothermal *** were sintered at different *** increased with sintering temperature,reaching up to 96%at 800℃.A grain growth was observed with increasing sintering *** spectroscopy analyses of the sintered samples at various temperatures were *** in dielectric constant and in Curie temperature with sintering was *** conductivity and activation energy were calculated and attributed to the microstructural factors.

关键词： ceramics sintering light scattering dielectric properties

New Biobased Polyurethane Materials from Modified Vegetable Oil

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Journal of Renewable Materials 2021年第7期9卷 1213-1223页

作者： Chakib Mokhtari Fouad Malek Sami Halila mohamed naceur Belgacem Ramzi Khiari Laboratoire de Chimie Appliquée et Environnement–ECOMP—Facultédes Sciences UniversitéMohamed PremierOujda60000Maroc University of Grenoble Alpes CNRSCERMAVGrenobleCedex 9France University of Grenoble Alpes CNRSGrenoble INPGrenobleF-38000France University of Monastir Faculty of Sciences of MonastirResearch Unit of Applied Chemistry and EnvironmentMonastir5019Tunisia Higher Institute of Technological Studies(ISET)of Ksar-Hellal Ksar-Hellal5070Tunisia

Bio-based polyurethanes(PUs)have been occurred a large attention *** was found to be an alternative to the petrochemical based materials to the fact of their weak environmental influence,availability,good price and *** addition,the nature shows several bio-derived compounds as raw materials for the synthesis of polyols,including the vegetable oils,polyphenol,terpene,and other bio-renewable *** the aim to develop a new family of biobased polyurethanes(PUs)via vegetable oils,the elaboration of new Jojoba-based PUs was performed by catalyst-free polycondensation reaction of a synthesized Jojoba diol with various diisocyanates such us toluene diisocyanate(TDI)and isophorone diisocyanate(IPDI).All the compounds were characterized by FTIR and NMR spectroscopies,and their properties were determined by gel permeation chromatography,differential scanning calorimetry and thermogravimetric *** obtained results show renewable vegetable oils-based PUs materials can be preparing using a new environmentally ways and giving various good properties performances.

关键词： Biopolymers Jojoba oil polyurethane polyol thiol-ene