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In recent years, it has been proven that one of the main issues in isolated applications is the importance of the dynamic characteristics assessment of three phase self-excited induction generator (SEIG). This paper presents a generalized state-space dynamic model using D-Q stationary reference frame of such a three phase SEIG. The values of self-excitation capacitance and the minimum and maximum...
In this paper, we present an improved version of MOBIL descriptor [1] (Improved MOments based BInary differences for Local description), which introduces two main contributions. The first one is the use of geometric information for the binary test instead of the classical intensity binary test, to get more precision in the description step. The second one is to attribute two bits for each test, to...
This paper deals with macroscopic traffic modelling. It investigates real magnetic sensor data, provided by the Performance Measurements System (PeMS), in order to identify some traffic parameters related to a portion of the SR60-E highway in Califorina. Then, these parameters are used to validate a switched linear traffic model.
The use of biometric technologies becomes ubiquitous in modern society due to the proliferating number of crimes and terror attacks as well as the vital need to provide safer environment. Gait biometrics is considered one of the emerging key research areas due to its potential use in a plethora of applications such as forensics and visual surveillance. As the evaluation of biometric-based evidence...
The objective of this study is to model the attenuation of ultrasonic waves as they propagate through the trabecular bone. Trabecular bone is assumed to be constituted of a binary mixture of a bone matrix and a saturating fluid (marrow or water). The disturbances to which it is subjected are supposed to be of low amplitude. The attenuation due to absorption is determined by using the analytical model...
The technical performance and robustness of the inverters used for connecting the PV modules to the network of electricity distribution are key elements which can have a significant effect on the production of electrical energy and therefore the financial viability of a power system. This work is a contribution to the modeling and control of a new structure for multilevel converters used in photovoltaic...
This paper presents modeling and control of an electric vehicle based on second order sliding mode control using super twisting algorithm. This algorithm allows reducing the chattering phenomenon that appears in a classical sliding mode control. Simulation results are presented to show the effectiveness of the proposed control method for current and speed control.
Distributed video coding (DVC) is a recent paradigm of video coding, based on distributed source coding and side information (SI) generated at the Decoder. Most of the DVC schemes are using complex channel codes such as LDPC or Turbo codes, which are increasing the decoder complexity and delay. Many searches have been done to simplfy the coding schemes, one of them was done by replacing the channel...
The paper presents a novel analysis of a nonminimum supersonic vehicle dynamics. First, a mapping of operating points of a hypothetical short-range tactical missile (SRTM) system is obtained using zero dynamics concept for nonlinear systems within flight envelop and under flight constraints. Then the characteristics of nonminimum phase, model topologies, and poles mappings are derived via linearization...
Nose tip localization is an important step for registration, preprocessing and recognition of 3D face data. In this paper, we propose a new approach for the nose tip detection that is robust to pose and expression variations and in presence of occlusions. From a rotated 3D face, we extract facial curves that are matched to a profile curve model. An optimal matching using the Riemannian geometry, based...
This paper presents the robust H∞ control problems for a class of uncertain Takagi-Sugeno (T-S) fuzzy systems with time-delay where uncertainties involved in the state and input matrices. The T-S fuzzy model is employed to represent uncertain delayed nonlinear systems. A delay-dependent stabilization criterion is first presented and new conditions of stabilization for uncertain T-S fuzzy model with...
The interest of this paper is to evaluate the cycle time of a Flexible Manufacturing System (FMS) containing shared resources. Thus, we propose a comparative study between the heaps of pieces theory based approach and the net of conflicting timed event graphs (NCTEG) in (max, +) algebra based approach. The general idea of the first method is to pile up pieces considered in a heap automaton according...
In this work a fuzzy adaptive PI controller is proposed for a class of uncertain nonaffine nonlinear systems. The parameters of the PI controller that can achieve the control objectives are approximated by a set of fuzzy systems. The fuzzy systems' parameters are adjusted by the gradient descent algorithm. The purpose behind the use of this adaptation algorithm is to minimize the error between the...
This paper presents the control of a photovoltaic distributed generation system based on dual-stage topology of DC-DC boost converter and three-level neutral-point-clamped (NPC) voltage source inverter (VSI). Decoupling control strategy of three-level VSI is proposed to control the current injected into the grid, reactive power compensation, and DC-link voltage. The resulting system is able to extract...
The presence of nonlinearity in the dynamics of a suspension system equipped with a hydraulic actuator and faced with road perturbations makes its control difficult. To provide an effective control action, a robust observer based output feedback control is proposed. For the estimation of the states in the presence of nonlinearities and perturbations a High Gain Observer is first designed. Employing...
In this paper we present an extended formalism of web services for developing a Remote Collaborative Manipulation system in Augmented Reality Environment. This system is an Internet-based virtual 3D environment that provides users a shared space and a collaborative platform for publishing, simulating and analyzing multidimensional data. In this paper, we have constructed our collaborative system using...
In this paper, we provide sufficient conditions for the existence of solutions of second order differential inclusions with initial conditions. Our results are obtained via application of the multi-valued version of Krasnoelskii type for the sum B+G; where B is linear or nonlinear operator and G is multi-valued operator.
This paper deals with the design of an observer-based extremum seeking controller for a bioprocess model. Parameters and state variables of the bioreactor are reconstructed by considering a high order sliding mode observer (HOSMO). The observer is coupled with a nonlinear controller whose design is based on feedback linearization, resulting in an extremum seeking controller for the optimization of...
Information on battery problems can be useful in guiding research to improve battery technology. Problems that are serious or reoccur are the obvious ones to concentrate on. Observed problems can be caused by more than one phenomenon. However the problem that was observed on the Alsat-1 battery module where some cells were damaged, and the damage was caused by the extreme temperatures, an explanation...
In this paper, hybridization between two artificial intelligence techniques is proposed for the control of inverted pendulum. The controller combines a genetic algorithms technique optimization with fuzzy logic controller. We employ this procedure in a genetic algorithm (GA) to search for the optimal parameters (gains) of fuzzy logic controller. Numerical simulations verify the validity of the proposed...
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