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Sensor Faults Observer Design with H_∞ Performance for Non-linear T-S systems

International Journal of Automation and computing 2013年第6期10卷 563-570页

作者： Imen Haj Brahim Maha Bouattour Driss Mehdi Mohamed Chaabane Ghani Hashim Laboratory of Sciences and Techniques of Automatic Control&Computer Engineering(Lab-STA) National School of Engineering of SfaxUniversity of Sfax LIAS-ENSIP University of PoitiersLIAS-ENSIP2 rue Pierre Brousse Computer Science Department Cihan University

This paper deals with the problem of the state estimation and the sensor faults detection for nonlinear perturbed systems described by Takagi-Sugeno （T-S） fuzzy models with unmeasurable premise variables. Indeed, a T-S observer is synthesized, in descriptor form, to estimate both the system states and the sensor faults simultaneously. The idea of the proposed approach is to introduce the sensor fault as an auxiliary variable in the state vector. Besides, the T-S model with unmeasurable premise variables is reduced to a perturbed model with measurable variables. Convergence conditions are established with Lyapunov theory and the H∞ performance in order to guarantee the best robustness to disturbances. These conditions are expressed in terms of linear matrix inequalities （LMIs）. The parameters of the observer are computed using the solution of the LMI conditions. Finally, a numerical example is given to illustrate the design procedures. Simulation results show the satisfactory performances.

关键词： Takagi-Sugeno （T-S） fuzzy system sensor faults H∞ performance descriptor approach observer linear matrix inequality（LMI）.

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Robust self-tuning regulation for the stochastic systems described by ARARMAX mathematical models

Robust self-tuning regulation for the stochastic systems des...

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International Conference on sciences and techniques of automatic control and computer engineering (sta)

作者： Nabiha Touijer Samira Kamoun Laboratory of Sciences and Techniques of Automatic control and computer engineering (Lab-STA) University of Sfax Sfax Tunisia

This communication deals with the explicit scheme of robust self-tuning regulation of a class of stochastic systems, which can be described by the input-output Auto-Regressive Auto-Regressive Moving Average with exogenous (ARARMAX) mathematical model with unknown and time-varying parameters in presence of unmodelled dynamics. This explicit regulation scheme is based on the proposed modified filtering recursive least squares algorithm with dead zone (m-F-RLS) in the step of estimation. Numerical simulation results of the developed explicit schemes of minimum variance self-tuning regulator, which are applied to the climate control in building, are given.

关键词： Estimation Mathematical model Heuristic algorithms Stochastic systems Robustness computers Noise

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Robust control of wheeled mobile robot in presence of disturbances and uncertainties

Robust control of wheeled mobile robot in presence of distur...

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International Conference on sciences and techniques of automatic control and computer engineering (sta)

作者： Yasmine Koubaa Mohamed Boukattaya Tarak Damak University of Sfax Laboratory of Sciences and Techniques of Automatic control & computer engineering (Lab-STA) Sfax Tunisia

This paper deals with the trajectory tracking control problem of nonholonomic wheeled mobile robot, in the presence of external disturbances and parameters uncertainties. The computed torque controller may be used to make convergence of WMR on desired trajectory. Due to the weak of performance against external disturbances, a sliding mode controller is presented. The stability of the controllers is proven by utilizing the Lyapunov stability theory.

关键词： Mobile robots Wheels Kinematics Uncertainty Vectors Equations Torque

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MPPT Algorithm for Photovoltaic Panel Based on Augmented Takagi-Sugeno Fuzzy Model

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International Scholarly Research Notices 2014年第1期2014卷

作者： Hafedh Abid Ahmed Toumi Mohamed Chaabane Laboratory of Sciences and Techniques of Automatic Control & Computer Engineering (Lab-STA) National School of Engineering of Sfax University of Sfax P.O. Box 1173 3038 Sfax Tunisiauss.rnu.tn

This paper deals with the Maximum Power Point Tracking (MPPT) for photovoltaic energy system. It includes photovoltaic array panel, DC/DC converter, and load. The operating point for photovoltaic energy system depends on climatic parameters and load. For each temperature and irradiation pair, there exists only one optimal operating point which corresponds to the maximum power transmitted to the load. The photovoltaic energy system is described by nonlinear equations. It is transformed into an augmented system which is described with a Takagi-Sugeno (T-S) fuzzy model. The proposed MPPT algorithm which permits transfering the maximum power from the panel to the load is based on Parallel Distributed Compensation method (PDC). The control parameters have been computed based on Linear Matrix Inequalities tools (LMI). The Lyapunov approach has been used to prove the stability of the system. Some reliable simulation results are provided to check the efficiency of the proposed algorithm.

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Tracking control for induction motor using Takagi-Sugenou approach

Tracking control for induction motor using Takagi-Sugenou ap...

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International Conference on sciences and techniques of automatic control and computer engineering (sta)

作者： Habib Ben Zina Moez Allouche Mohamed Chaabane Mansour Souissi Laboratory of Science and technique of Automatic Control and Computer Engineering(Lab-STA)

This paper studies an observer based H ∞ tracking control problem for induction motor by using Takagi-Sugenou model. The proposed method can guarantee the stability and improve tracking performance. The gains of the controller and the observer are given in a single step formulated in LMIs condition. The Takagi-Sugenou fuzzy model is used to approximate the nonlinear system in the synchronous d-q frame rotating with field-oriented control strategy. A fuzzy controller is designed to reduce the tracking error where the inaccessible rotor flux is estimated by a T-S fuzzy observer. Simulation results are given to show the effectiveness of the proposed observer-based tracking controller.

关键词： Induction motors Observers Rotors stators computers Torque Takagi-Sugeno model

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Fuzzy Network-based control for nonlinear systems with limited communication

Fuzzy Network-based control for nonlinear systems with limit...

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International Conference on Systems, Analysis and automatic control

作者： Mourad Kchaou Ahmed Toumi Laboratory of Sciences and Techniques of Automatic control & computer engineering (Lab-STA) High Institute op Applied Sciences and Technology Sousse ISSATso University of Sfax National School of Engineers of Sfax

ISBN: (纸本)9781467364591

This paper is concerned with the problem of stabilization of continuous-time Takagi-Sugeno (TS) fuzzy systems which are controlled through networks. Network-induced delays, data packet dropouts, and measurement quantization are simultaneously considered for Network signal-transmission. Based on the LyapunovKrasovskii functional approach and a parallel distributed compensation scheme, a delay-dependent stabilization approach is developed for the NCSs, which guarantees that the closed-loop system is asymptotically stable. Finally, an illustrative example is given to illustrate the effectiveness of the proposed design technique.

关键词： Nonlinear systems design techniques Closed loop systems data packets Fuzzy Communication Research dropouts Student Dropouts standing Orders Fuzzy systems

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Takagi Sugeno fuzzy observer based Direct Rotor Field Oriented control of induction machine

Takagi Sugeno fuzzy observer based Direct Rotor Field Orient...

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International Conference on Systems and control (ICSC)

作者： Mohamed Bahloul Mansour Souissi Mohamed Chaabane Larbi Chrifi-Alaoui Universite de Sfax Sfax TN Laboratory of Sciences and Techniques of Automatic Control and Computer Engineering (Lab-STA) University of Sfax Sfax Tunisia Laboratory of Innovative Technology (LTI) University of Picardie Cuffies France

This paper proposes a Takagi Sugeno (TS) fuzzy field observer in a rotor-flux-oriented reference frame. The proposed approach dealt with the conventional Direct Rotor Field Oriented control (DRFOC) in a high speed application. The main aims are to provide new methods to observe the flux in same reference frame as the controller. In the initial development, we propose a TS model for the induction machine. Later, a TS fuzzy full order observer is described. Then a stability and a D-stability analysis are presented to proof in the first time, the stability and to garret in the second time, some dynamic behaviour for the observer through the Lyapunov theory. The proposed results are based on LMIs terms (Linear Matrix Inequalities) which can be solved easily using Matlab tools. A numerical example is provided to show the effectiveness of the proposed results.

关键词： Observers Rotors Symmetric matrices stability analysis Induction motors IP networks

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Fuzzy c-regression models based on the BELS method for nonlinear system identification

Fuzzy c-regression models based on the BELS method for nonli...

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International Conference on Electrical engineering and Software Applications (ICEESA)

作者： Borhen Aissaoui Moêz Soltani Dorsaf Elleuch Abdelkader Chaari Universite de Tunis Ecole Superieure des Sciences et Techniques de Tunis Tunis TN Laboratory of Sciences and Techniques of Automatic control & computer engineering (Lab-STA) National Engineering School of Sfax Sfax Tunisia Research Unit on Control Monitoring and Safety of Systems (C3S) (ESSTT) Tunisia

ISBN: (纸本)9781467363020

A fuzzy c-regression model clustering algorithm based on Bias-Eliminated Least Squares method (BELS) is presented. This method is designed to develop an identification procedure for noisy nonlinear systems. The BELS method is used to identify consequent parameters and eliminate the bias. The proposed approach has been applied to benchmark modeling problem which proved a good performance.

关键词： Mathematical model Clustering algorithms Equations Noise Vectors Nonlinear systems Computational modeling

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H∞ control of nonlinear Fuzzy descriptor system via LMI

H∞ control of nonlinear Fuzzy descriptor system via LMI

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International Conference on Electrical engineering and Software Applications (ICEESA)

作者： Assil Ayadi Amine Trabelsi Mohamed Chaabane Driss Mehdi National Engineering School of Sfax (ENIS) Laboratory of Sciences and Techniques of Automatic control & computer engineering (Lab-STA) University of Sfax Sfax Tunisia Laboratoire dInformatique et dautomatique pour les systèmes (LIAS) Université de Poitiers Poitiers France

ISBN: (纸本)9781467363020

This paper deals with the H ∞ control of nonlinear fuzzy descriptor system described by Takagi-Sugeno fuzzy models. In the first step, we present a stability analysis of nonlinear fuzzy descriptor system. The stability conditions are given in LMI form. In the second step, we have developed H ∞ PDC control law in order to reject the effects of external disturbances submitted to the system. Finally, a simulation example is presented to illustrate the mains results.

关键词： Symmetric matrices Xenon stability analysis Mathematical model Vectors PD control Matrix decomposition

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Comparison between a backstepping mode control and a sliding mode control for a boost DC-DC converter of a photovoltaic panel

Comparison between a backstepping mode control and a sliding...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Yosra Massaoudi Tarak Damak Mariem Ghamgui Driss Mehdi National Engineering School of Sfax (ENIS) Laboratory of Sciences and Techniques of Automatic control & computer engineering (Lab-STA) University of Sfax Sfax Tunisia Laboratoire dInformatique et dAutomatique pour les systèmes (LIAS-ENSIP) Université de Poitiers Poitiers France

ISBN: (纸本)9781467364591

This paper focuses on the development of renewable energy systems. The main goal is the optimal exploitation from photovoltaic panels. Therefore, two robust control laws will be applied on the DC-DC boost converter in order to maintain a robust output voltage regulation. The first part of this communication is devoted to the backstepping mode control. In the second part, we will present the sliding mode control. Finally, we will present simulations to illustrate the validity of the proposed approaches and to compare their performances.

关键词： Backstepping Voltage control Mathematical model Sliding mode control Resistance stability analysis Equations

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