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The present work deals with the design of a fuzzy controller insuring speed tracking of a leisure electrical vehicle. Traction motor is an axial-flux permanent-magnet one arranged in a TORUS configuration. Firstly, all parts of the vehicle powertrain are described then analytically modelled. Further, controller membership functions are introduced and fuzzification/defuzzification rules are defined...
Degradation of air quality caused by human activity is a problem to be taken seriously because its consequences affect us directly, more or less long term. Electronic nose (e-nose), as a kind of new monitor, combines electronic measurements and intelligent pattern recognition technology and has advantages of real-time detection and easy operation. This paper presents the classification of different...
Direct matrix converter is an efficient dc-link capacitor less direct AC/ AC conversion scheme. It consists of bidirectional switches arranged such that any input phase can be connected to any output phase at any point in time. This paper presents a Space Vector Modulation (SVM) control technique applied to direct Matrix converter. The model of the direct matrix converter and the principle of the...
In this work, the power flow (PF) calculation method using Newton-Raphson algorithm including simultaneously wind farms and FACTS devices is studied. The power flow model for a stall regulated fixed speed wind generator (SR-FSWG) system is discussed to assess the steady-state condition of power systems with wind farms. A general steady-state modeling approach of power systems having SR-FSWG and the...
The wind power is characterized by fluctuation due to intermittent primary source, which can damage the electrical network stability because of the imbalance between production and consumption. To solve this problem, this paper is focused on the dynamic of wind farm made by the association of N-aerogenerators with Permanent Magnetic Synchronous Generator (PMSG). The scope of this work is to investigate...
In this paper, multimodel and neural emulators are proposed for nonlinear plants with unknown dynamics. The contribution of this paper is to extend the emulators to multi-variable non square systems. The effectiveness of the proposed emulators are shown through an illustrative simulation example. The obtained results are very satisfactory and show the best performances of the multimodel emulator relatively...
This paper presents the direct numerical approach used to develop an optimal feedback control law of linear quadratic systems via the block pulse functions (BPFs) parameterization technique. This tool transforms the optimal control problem to a mathematical programming problem solved numerically. An illustrative example is included to demonstrate the effectiveness of this method and compare the developed...
Based on aggregation techniques associated with the arrow form matrix, to derive the stability property of dynamic discrete-time complex systems, a new strategy of control is formulated for chaos hybrid synchronization of two identical 3D Henon maps. The designed state feedback controller ensures that the state variables of both controlled hyperchaotic slave system globally synchronize, in hybrid...
WiMAX is a standard based on wireless technology that provides high throughput broadband connections over long distance. This technology can be used for a number of applications, including “last mile” broadband connections, hotspots and high-speed connectivity for business customers. The objective of this article is to propose an approach to design a network on the latest standard of WiMAX namely...
Foremost systems of electrical energy production are based on three-phases synchronous generators. In this work we are going to propose an efficient diagnosis technique, based on the use of a low-cost sensor, for the online detection of a transient abrupt drop in the drive speed system. Tests have been conducted on a four-pole brushless alternator driven by a DC shunt motor. Through conventional time-frequency...
The paper deals with fault detection (FD) of interturn short-circuit in stator windings (SF) in three-phase squirrel-cage induction motors (IM) based on sliding mode observers (SMO). Theoretical developments of both healthy and faulty IM models in the abc-reference frame highlight the impact of such fault. IM modeling in αβ-frame is investigated in order to reconstruct current and speed IM using first-order...
In this paper ART2 classifier is used to extract clusters of databases taken from complex processes with different behaviors. The used classifier is an unsupervised one and the obtained clusters characterize local models of a considered system. These local models represent linear behaviors of the process. This result is the consequence of the characteristic of the F1 layer of the ART2 neural network...
In this paper, we evaluated the performance of face recognition based on Wavelet Packet Decomposition (WPD) and Principal Component Analysis (PCA) at second level of decomposition where six wavelet families are employed namely: Daubechies, Haar, Coiflets, Symlets Biorthogonal, and Reverse Biorthogonal. Firstly by taking all of the sixteen subbands obtained after the second level of decomposition and...
In this paper, a method of fault estimation based on unknown input observer is presented for a class of neutral time-delay system. First, an unknown input observer is described to achieve fault estimation for neutral time-delay system with a constant delay. An observability condition is generated to guarantee observer use. Then, the observer is used to generate an algebraic method of actuator fault...
This work studies the spread of a UWB pulse in biological tissue, which forms the propagation media to the electromagnetic waves to detect a heartbeat. This tissue is multiple Modeled as semi-infinite lossy and dispersive media. The study focused on the deformations at the interfaces between two successive layers. The FDTD method is an approach for solving Maxwell's equations. However, we note at...
The power of desalination system by renewable energy sources (RES) systems has been going through an upwards trend, especially during the last decade. This paper concerns the modeling and the control of a desalination unit by reverse osmosis based solar energy. The system includes photovoltaic panels, electrical converters, batteries and a desalination unit which presents the load. Dynamic modeling...
The aim of this paper is the study and the design of a monitoring module based on P-time Petri nets (P-TPN) for manufacturing job-shops with time constraints. In such systems, operation times are included between a minimum and a maximum value. The monitoring consists in a set of two collaborative PNs. The first is used for modeling of normal behavior of the system by temporal spectrum of the marking...
Sliding mode control (SMC) has been considered as an effective tool in different studies for control systems. The robustness of SMC against the disturbances and model uncertainties makes the system stable. However, the chattering phenomenon degrades the system performances, it may even lead to instability. This paper deals with the second order sliding mode the twisting and super-twisting algorithm...
In this paper, a comparison between PI and sliding mode control is proposed for the control for flexible joint manipulator driving by Brushless DC motor (BDCM)to improve the performance in the presence of errors in the parameters identification. First, the model of flexible joint manipulator was presented. Then, a PI control is studied and designed for tracking problem of the single flexible joint...
In this paper, a new microrobot design and its analytical analysis have been proposed, investigated and expected to improve the performance, robustness and fabrication process for microrobot-based applications. The analytical model has been developed to predict and compare the performance of the proposed design and conventional one, where the comparison of microrobot architectures shows that the proposed...
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