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

作者： Aida Drira Nabil Derbel Research unit on Intelligent Control design & Optimization of complex Systems (ICOS) Engineering School of Sfax (ENIS) Sfax Tunisia

In this paper, we have developed a feedforward neural networks to detect and to diagnosis rotor fault on induction motors using stator currents. In the first step, causes and effects of rotor fault have been studied, particularly, the number of broken bars has been considered. Then, in the second step, the number of broken rotor bars has been localized by Artificial Neural Networks (ANN), using the Fast Fourier Transform. Simulation results show that the Neural Network proposed approach presents a good tools for the diagnostic of induction machines.

关键词： Rotors Artificial neural networks Bars Stators Neurons Induction motors Circuit faults

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design Of Non-Diagonal controller Using MIMO-QFT Approach Combined With CRONE control:Application To Square System

Design Of Non-Diagonal Controller Using MIMO-QFT Approach Co...

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第五届国际自动控制联合会分数阶导数及其应用会议

作者： Najah Yousfi Pierre Melchior Chokri Rekik Nabil Derbel Alain Oustaloup Research unit on Intelligent Control design & Optimization of complex Systems (ICOS)University of Sfax Sfax Engineering School BP W 3038 Sfax Tunisia. IMS (UMR 5218 CNRS Université Bordeaux 1 - ENSEIRB - ENSCPB)Département LAPS 351 cours de la Liberation B(a)t. A4 - F33405 TALENCE cedex France. IMS (UMR 5218 CNRS Université Bordeaux 1 - ENSEIRB - ENSCPB) Département LAPS 351 cours de la Liberation B(a)t. A4 - F33405 TALENCE cedex France.

To govern perfectly the MIMO(Multi-Input Multi-Output) processes,a fully populated matrix controller has been proposed due to its *** non diagonal quantitative feedback theory approach is used with CRONE control struc... 详细信息

关键词： QFT design Of Non-Diagonal controller Using MIMO-QFT Approach Combined With CRONE control:Application To Square System controller

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Path Tracking design Based On Frequency-Band Limited Fractional Differentiator With Speed And Acceleration Input

Path Tracking Design Based On Frequency-Band Limited Fractio...

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第五届国际自动控制联合会分数阶导数及其应用会议

作者： Pierre Melchior Najah Yousfi Chokri Rekik Nabil Derbel Alain Oustaloup IMS (UMR 5218 CNRS Université Bordeaux 1 - ENSEIRB - ENSCPB)Département LAPS 351 cours de la Liberation B(a)t. A4 - F33405 TALENCE cedex France. Research unit on Intelligent Control design & Optimization of complex Systems (ICOS)University of Sfax Sfax Engineering School BP W 3038 Sfax Tunisia. IMS (UMR 5218 CNRS Université Bordeaux 1 - ENSEIRB - ENSCPB) Département LAPS 351 cours de la Liberation B(a)t. A4 - F33405 TALENCE cedex France.

A new approach to path tracking based on fractional prefilter was developed in this *** previous works,this approach based on a Frequency Band Limited Fractional Differentiator(FBLFD)prefilter,with the position contro... 详细信息

关键词： Path Tracking design Based On Frequency-Band Limited Fractional Differentiator With Speed And Acceleration Input

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Leader-follower based formation control of nonholonomic robots using the virtual vehicle approach

Leader-follower based formation control of nonholonomic robo...

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IEEE International Conference on Mechatronics

作者： Ghommam, Jawhar Mehrjerdi, Hasan Saad, Maarouf Research Unit on Intelligent Control and Optimization of Complex Systems National School of Engineer of Sfax ENIS Tunisia Department of Electrical Engineering École de Technologie Suṕrieure 1100 rue Notre-Dame Ouest Montreal QC Canada

ISBN: (纸本)9781612849836

In this paper we investigate the leader follower motton coordination of multiple nonholonomic mobile robots. A combination of the virtual vehicle and trajectory tracking approach is used to derive the formation architecture. A virtual vehicle is steered in such away it stabilizes to a shifted reference position/heading deflned by the leader, the velocity of the virtual vehicle is then provided for further use in designing control law for the follower independent from the measurement of leader's velocity. Position tracking control is then constructed for the follower to track the virtual vehicle using the backstepping and Lyapunov direct design technique. Simulations are provided to show the effectiveness of the proposed approach. © 2011 IEEE.

关键词： Vehicles

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On the training of recurrent neural networks

On the training of recurrent neural networks

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

作者： Mounir Ben Nasr Mohamed Chtourou Research Unit on Intelligent Control Design & Optimization of Complex Systems (ICOS) Department of Electrical Engineering ENIS BP W University of Sfax Sfax Tunisia

This paper proposes a new approach which combines unsupervised and supervised learning for training recurrent neural networks (RNNs). In this approach, the weights between input and hidden layers were determined according to an unsupervised procedure relying on the Kohonen algorithm and the weights between hidden and output layers were updated according to a supervised procedure based on dynamic gradient descent method. The simulation results show that the proposed method performs well in comparison with the back propagation through time algorithm.

关键词： Training Recurrent neural networks Heuristic algorithms Artificial neural networks Neurons Clustering algorithms Signal processing algorithms

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Determination of Camera's Cycab Position

Determination of Camera's Cycab Position

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

作者： Rania Loukil Dhouha Bouchaala Yann Dumortier Research unit of Intelligent Control design and Optimization of complex Systems (ICOS) National School of Engineering Sfax Tunisia Paris Roquencourt IMARA Project INRIA France

This work describes a visual odometry by minimizing a quadrifocal constraint in order to calculate the position of an autonomous vehicle (Cycab). This method can also reject outliers corresponding to moving objects such as occlusions and illumination changes. An iterative non-linear trajectory estimation approach is formulated and it is based on a quadrifocal relationship between the image intensities within adjacent views of the stereo pair. The technique is applied to recovering the trajectory of a moving vehicle in a video sequence.

关键词： Cameras Estimation Cost function Tensile stress Visualization Robustness Least squares approximation

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Analysis of neural interaction during adaptation of reach-to-grasp task under perturbation with Bayesian networks

Analysis of neural interaction during adaptation of reach-to...

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2011 4th International Conference on Biomedical Engineering and Informatics, BMEI 2011

作者： Sang, Dong Lv, Bin He, Huiguang Wang, Feiyue He, Jiping State Key Laboratory of Intelligent Control and Management of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Harrington Departemnt of Bioengineering Center for Neural Interface Design Arizona State University Tempe United States

ISBN: (纸本)9781424493524

In this work, we took the analysis of neural interactions change in M1 of a monkey during the adaptation process for it to complete reach-to-grasp tasks with external perturbation across days. BN model was applied to model and evaluate neural interaction networks from recorded neural spike trains data of each set. Our results showed that for delay period across sets, interaction level of neural network tended to be higher during later stage of adaptation than during begin stage, which indicated the monkey performed more fully preparation through adaptation. In addition, for both delay period and peri-movement period, the neural interaction networks tended to change more stably from one set to the next as the monkey adapted to the perturbation experiment better. © 2011 IEEE.

关键词： Bayesian networks

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Assessment of beef meat aging using impedance spectroscopy

Assessment of beef meat aging using impedance spectroscopy

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

作者： Mahdi Guermazi Uwe Tröltzsch Olfa Kanoun Nabil Derbel Research unit on Intelligent Control design & Optimization of complex Systems (ICOS) Sfax Engineering School BPW University of Sfax Sfax Tunisia Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany

The aim of the paper is to assess the feasibility of impedance measurements for meat aging detection. The carried investigations are dedicated to the aging of the meat of beef. An investigation was carried out for the detection of the age of meat using 2 cases of storage in the fridge, unpacked meat, exposed in the air of the fridge (Up) and vacuum-packed meat, conserved in closed box (Vp). The measurements show a depressed semicircle in the admittance plane similar to the equivalent circuit consisting of a combination of a Constant Phase Element (CPE) and two resistors. The resistance R E various is directly proportional to meat volume resistivity. The volume resistivity is constant for Vp meat, this is due to the conservation of the same situation in the surface of contact with the electrode, this situation change for the Up meat, the volume resistivity is increasing in a linear way because the surface of contact with electrode become more dry over time. The change due to R ct is inversely proportional to the factor number of electrons involved and exchange current. The factor n.i 0 decreases over time for the Up meat, This is consistent because when the meat becomes drier, the loss of liquids causes the decrease of conductivity and proportionally the decrease of the number of electrons involved and the exchange current. For the second case (Vp), the humidity causes the decrease of the number of electrons involved and the exchange current. The impedance is inversely proportional to the double layer capacitance that is consistent with the experiments. The impedance increase for the Up meat and decrease in the second case. The change due to Cdl is directly proportional to the change of meat permittivity ε r .

关键词： Electrodes Impedance Conductivity Mathematical model Dispersion Equations Aging

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Fuzzy predictive control of nonlinear systems

Fuzzy predictive control of nonlinear systems

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

作者： Widien Dhouib Mohamed Djemel Mohamed Chtourou Research Unit of Intelligent Control design & Optimisation of complex Systems (ICOS) National School of Engineering of Sfax University of sfax Sfax Tunisia

This paper presents two strategies of nonlinear predictive control based on a Takagi-Sugeno fuzzy model. The first one introduces a fuzzy logic-based modeling methodology, where a nonlinear system is divided into a number of linear subsystems. So the linear model based predictive control (MPC) technique is used for each subsystem. In the second one, the fuzzy model is considered as a nonlinear model of the system and the control signal is obtained by minimizing either the cumulative differences or the instant difference between set-point and fuzzy model output. The efficiency of these two fuzzy model predictive control (FMPC) approaches is demonstrated through two examples.

关键词： Predictive models Predictive control Mathematical model Equations Nonlinear systems control systems

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A New CMOS Current controlled Quadrature Oscillator Based on a MCCII

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Circuits and systems 2011年第4期2卷 269-273页

作者： Ashwek Ben Saied Samir Ben Salem Dorra Sellami Masmoudi Computor Imaging and Electronic Systems Group (CIEL) Research Unit on Intelligent Design and Control of complex Systems (ICOS) University of Sfax National Engineering School of Sfax (ENIS) Development Group in Electronics and Communications (EleCom)

In this paper, we propose a design of a current controlled Quadrature Sinusoidal Oscillator. The proposed circuit employs three optimized Multi-output translinear second generation current conveyer (MCCII). The oscillation condition and the oscillation frequency are independently controllable. The proposed Quadrature Oscillator frequency can be tuned in the range of [198 MHz –261 MHz] by a simple variation of a DC current. PSpice simulation results are performed using CMOS 0.35 μm process of AMS.

关键词： Quadrature Sinusoidal Oscillator Optimized MCCII

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