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In this paper we consider the problem of the stability of switched nonlinear systems. We use an optimization strategy based on Linear Matrix Inequality (LMI) and a genetic algorithm (GA), to compute the region of attraction of each subsystem. The feedback control will be designed to guarantee global stability by means the multiply Lyapunov functions under a switching signal. The implementation and...
This paper presents an image-based path following task for a nonholonomic mobile robot using visual line features. To perform this task, the robot has to keep the features in his field of view. For this purpose, an image-based visual servo controller using task function formalism is developed to control the robot motion. The proposed controller is implemented on carlike robot and evaluated through...
This article is a study which consists in conceiving a system able to detect the defaults with the electric arc which can occur in a distribution network. It is made up mainly of three sensors of current and Digital Signal Processor (DSP). The adopted approach is based on the concepts of the numerical filters. This system detects the presence of unwanted and alarming frequencies in the distribution...
Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is then marked by sequences of change operations in order to adapt changes in the renewal of the knowledge domain. Each operation leading to a state of inconsistency on a target component is therefore susceptible to change the status of other components and therefore the state of the ontology at the macroscopic...
In this paper we investigate the bifurcation and chaos in a fractional-order simplest electrical circuit composed of only three circuit element: a linear passive capacitor, a linear passive inductor and a nonlinear active memristor with two degree polynomial memristance and a second order exponent internal state. It is shown that this fractional circuit can exhibit rich nonlinear dynamics such as...
In this paper an adaptive control technique combined with the so-called IDA-PBC (Interconnexion Damping Assignment, Passivity Based Control) controller is proposed for the stabilization of a class of underactuated mechanical systems, namely, the Inertia Wheel Inverted Pendulum (IWIP). It has two degrees of freedom with one actuator. The IDA-PBC stabilizes for all initial conditions (except a set of...
In this paper, a sliding mode control technique is applied to control a variable speed wind energy conversion system (WECS) with a doubly fed induction generator (DFIG) and a cycloconverter. The dynamic behavior of the WECS, including the models of the wind turbine, the DFIG, the cycloconverter and the powers control, is investigated. Stator flux oriented control with sliding mode control and cosine-wave...
In this paper, we propose a decoupled sliding mode with type 2 fuzzy neural network control scheme that has the ability to enhance the transient stability and achieve voltage regulation of on a two-generator infinite bus power system. The design of this controller involves the direct feedback linearization (DFL) technique and the sliding mode (SM) control theory. In this approach, the whole system...
A three dimensional computational fluid dynamics model is proposed in this paper to investigate the effect of flow field design and dimensions of current collectors on performance of proton exchange membrane fuel cell (PEMFC) under different operating conditions. Influences of the ribs and openings current collector dimensions have been studied and analyzed in order to find the optimum ratio between...
The need to integrate automatic communication systems in daily applications and technology progress has encouraged speech synthesis sector development. Many variety of voice systems synthesis exist but diphones concatenation method appears to be efficient to contribute to speech synthesis of many languages. The first task in any development of speech synthesis system is to prepare the data base used...
This paper proposes a fuzzy approximation-based adaptive sliding-mode controller for uncertain nonlinear perturbed underactuated systems. The fuzzy logic system is used for approximating the unknown nonlinear functions. For estimating the parameters of the fuzzy systems and some unknown bounds, a set of adaptation laws are appropriately designed. The boundedness of all signals of the closed-loop system...
In this paper we consider the control of the methane flow rate in biogas production using a continuous stirred tank reactor or a fixed bed digester. The goal is to regulate the methane flow rate in order to match an energy demand in spite of variations in the waste concentrations. For this purpose, a two step (acidogenesis-methanogenesis) nonlinear mass balance model is considered. Due to the costs...
This proposed paper is going to deal with the main new methods which are applied in both of the simultaneous dynamic eccentricity and broken rotor bars diagnosis inside the induction machines. The proposed method is based on the Fast Fourier transform, or spectral analysis of the measured magnetic flux density in the air-gap. More particularly, this paper deals with the use of a finite element method...
This paper aims to enhance the performance of a photovoltaic (PV) pumping system used for crop irrigation in greenhouses. Usually, most of the PV panels, which are used in such kind of systems, are sized and directly connected to the motopumps in a way that provide the maximum of its power. This configuration is simple, cheap, and efficient only under Standard Test Conditions (STC). In fact, environmental...
A triple band bowtie antenna with multiband operations for Long-Term Evolution (LTE2300/2500) and WLAN (5.8 GHz) applications is presented and studied in this paper. The antenna is designed using transmission line method; this antenna is suitable to be embedded inside the casing of the laptop computer. Three operating bands covering 2.3ߝ2.4, and 2.5ߝ2.69 GHz for the LTE and 5.725ߝ5.852 GHz for WLAN...
The aim of this paper is to present an approach to economically improve the overall performance, dependability, reliability and availability of electricity generation power plants in south of Algeria by integrating renewable energy. A prefeasibility study of a hybrid 9×1.9MW Diesel power generation plant in Tindouf (Algeria) from conventional and renewable energy sources will help to improve the performances...
Due to the special characteristics of piezoelectric actuators, the modelling and control task of these devices has been one of the most important research topic in the last decade. In the first part of this paper, a T-S fuzzy model is proposed to represent the behavior of this type of actuators and the recursive least squares (RLS) algorithm is used to optimize the parameters of this model. In the...
This paper integrates a suitable controller in DC-bus voltage regulation loop of the direct current control (DCC) algorithm for three-phase grid-connected PV system. The proposed controller named fractional order PI (FO-PI) controller adjust the integration order from integer to real value. The FO-PI controller provides a faster settling time and stands the parameters variation and the external disturbances...
This work is a study, analysis and implementation of the indirect space vector modulation for three to three phase matrix converter. The input factor is fixed to zero, an over modulation is presented. The algorithm is implemented on dSPACE 1104 with real voltage sensors and an acquisition of the results using control desk and oscilloscope is presented.
This paper presents deals with uncertain description of a system for a type I diabetes mellitus patient under an intensive insulin treatment. The control algorithm employs a robust H∞ controller to regulate the blood glucose level in diabetic patients. Diabetes mellitus is a kind of chronic metabolic diseases in which body's blood glucose regulatory system doesn't function properly. In this study,...
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