hatem tlijani - Academia.edu (original) (raw)

Papers by hatem tlijani

2023 9th International Conference on Control, Decision and Information Technologies (CoDIT)

International Journal of Advanced Computer Science and Applications, 2017

The wheel-rail-sleepers system is simulated as a series of moving point loads on an Euler-Bernoul... more The wheel-rail-sleepers system is simulated as a series of moving point loads on an Euler-Bernoulli beam resting on a visco-elastic half space. This paper concentrates on the railsleepers interaction system (railway system) and the fault detection. The main objective is to mathematically develop and implement a dynamic model of a railway system then the diagnosis of system defects using a Luenberger observer (LO). The simulation results are based on a physical description, mathematical equations and simulations with MATLAB simulation program.

IGI Global eBooks, Jul 26, 2016

This chapter proposes a two-input-and-one-output fuzzy controller for a two-wheeled mobile robot.... more This chapter proposes a two-input-and-one-output fuzzy controller for a two-wheeled mobile robot. The robot moves following a hybrid plan based on Genetic Algorithms and Constraint Satisfaction Problem techniques. The path yielded by this hybrid plan is structured by artificial beacons. In each position of these beacons, the current velocity of the controlled robot is by itself an input for the fuzzy controller. The second input is the time delay between the current position and the next sub goal to be reached. The proposed fuzzy controller aims to converge the time delay between positions in the path tracking closely to a time window. It gives the appropriate acceleration so that the time delay becomes closer to the time window.

Handbook of Research on Advanced Intelligent Control Engineering and Automation

HAL (Le Centre pour la Communication Scientifique Directe), Mar 3, 2011

Different electric wind power conversion systems structures can be used based on the structures o... more Different electric wind power conversion systems structures can be used based on the structures of converters used. The main objective in all topologies is always the same: the wind energy at varying wind velocities has to be converted to electric power with the highest performances [6,7,8,9,10]. In this paper a wind energy conversion schemes is presented based on the Indirect Field Oriented Control (IFOC)

ABSTRACT This paper aims to present a motion coordination control approach for multi-axe machine,... more ABSTRACT This paper aims to present a motion coordination control approach for multi-axe machine, using a new curvilinear task coordinate frame that is attached to the desired contour. By transforming the machine dynamic model to this task coordinate frame, a sliding mode control is derived to improve the contouring performance under bounded disturbances. The effectiveness of the proposed control law is demonstrated through the drawing of a circle profile.

International Journal of Advanced Computer Science and Applications, 2017

Indonesian Journal of Electrical Engineering and Computer Science, Dec 1, 2017

This paper is a comparisation study between an experimental data and Matlab simulation of output ... more This paper is a comparisation study between an experimental data and Matlab simulation of output PV characteristic affected by the orientation and the tilt angle of a photovoltaic solar module with inclined plane and by the dimension of the panel. The PV panel was rotated towards the east, south and west and positioned for the angles 0°, 30°, 45°, 60° and 90°. In this position, the values of current, voltage and power are measured. In the other side, using the mathematical model to calculate the solar radiation incident on an inclined surface as a function of the tilt angle was developed in MATLAB/SIMULINK model. The optimum angles were determined as positions in which maximum values of solar irradiation and maximum power were registered to characterize the P-V and V-I photovoltaic panel.

Advances in computational intelligence and robotics book series, 2015

2016 4th International Conference on Control Engineering & Information Technology (CEIT), 2016

This paper deals with the problem of diagnosis of linear system defects. The problem of fault det... more This paper deals with the problem of diagnosis of linear system defects. The problem of fault detection under disturbances for multi-input and multi-output (MIMO) system. Fault detection can be investigated by generating residuals. These residuals can be generated using different methods. In this paper we will used one of the finest methods for generating residuals is luenberger observer (LO). Fault can be detected and isolated simply with the help of the generated residual. Where the simulation results on a railway system demonstrate that the effectiveness of the proposed approach.

The purpose of this study is to give us a detailed comparison between the two methods of maximum ... more The purpose of this study is to give us a detailed comparison between the two methods of maximum power point tracking algorithm for photovoltaic systems: Perturb and Observe (P O) and fuzzy logic (F L). This occurred under different conditions of irradiation. Simulation results has indicated that the proposed fuzzy logic controller (F LC) could provides faster and stable tracking maximum power and much better behavior than (P O) methods.

2023 IEEE International Conference on Advanced Systems and Emergent Technologies (IC_ASET)

2022 IEEE 9th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)

Advances in Mechanical Engineering

To solve the problems of low accuracy and poor stability due to uncertainties, external disturban... more To solve the problems of low accuracy and poor stability due to uncertainties, external disturbances and unknown load, which exist in the position control of rigid joint robot manipulator, this article is to propose Non-Singular Fast Terminal Sliding Mode Control strategy with Wavelet neural networks observer (NSFTSMCW). The wavelet observer is designed using the online approximation capability of the neural network, which is used to online estimate the modeling error, external disturbances and uncertainties generated by the dynamic surface control of the joint robot online. Combining the above strategies, the robot manipulators position controller is designed. The stability of this control strategy is demonstrated by stability analysis using the Lyapunov criterion. Simulations on the 2-Link Rigid Joint (2LRJ) robot show that the control strategy can overcome the chattering phenomena ensures the accuracy and stability of the joint robot position control.

2011 International Conference on Communications, Computing and Control Applications (CCCA), 2011

ABSTRACT Different electric wind power conversion systems structures can be used based on the str... more ABSTRACT Different electric wind power conversion systems structures can be used based on the structures of converters used. The main objective in all topologies is always the same: the wind energy at varying wind velocities has to be converted to electric power with the highest performances (6,7,8,9,10). In this paper a wind energy conversion schemes is presented based on the Indirect Field Oriented Control (IFOC)

IOSR Journal of Computer Engineering, 2014

The problems of optimization are considered as a type of a constraint satisfaction problem: COP (... more The problems of optimization are considered as a type of a constraint satisfaction problem: COP (Constraint Optimization problem). In this frame goes our first works which are interested in the optimization of a reference trajectory of a mobile robot used for the surveillance (Surveyor Robot). Indeed, in the previous work we have focused on the minimization of the length of this trajectory by using the approach of the genetic algorithms. At the level of our present researches we shall add temporal windows to limit the time delayed in the passage between one surveyed site and the following one. The consideration of temporal aspects requires a modelling of problem with a satisfaction of constraints. So that, a hybridization of the algorithm of optimization already developed at the previous work by the approach of CSP (Constraint Satisfaction Problem), is indispensable for our case. The new algorithm which will be developed and feigned at this work is a genetic algorithm allowing minimizing the length of a trajectory crossed by a mobile robot of surveillance by respecting the time fixed to take during the passage through two successive sites.

Applied Energy, 2011

This article analyzes the optimal choice of the tilt angle for the solar panel in order to collec... more This article analyzes the optimal choice of the tilt angle for the solar panel in order to collect the maximum solar irradiation. In this paper, the collector surface is assumed to be facing toward equator. The study is based upon the measured values of daily global and diffuse solar radiation on a horizontal surface. It is shown that the optimal angle of tilt (b opt) for each month, allows us to collected the maximum solar energy for Madinah site. Annual optimum tilt angle is found to be approximately equal to latitude of the location. It is found that the loss in the amount of collected energy when using the yearly average fixed angle is around 8% compared with the monthly optimum tilt b opt .

2022 IEEE 21st international Ccnference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)