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The anchored sheet pile is a relatively new structure fonn, whidt is suitable for large civil engineering because of its short construction time and less materials consumption. However, since the stress state of the anchored sheet pile is complex, and diJTicult to calculate, this structure is limited in use. In order to understand the stress and defonnation characteristics of the anchored sheet pile,...
This paper present nonlinear backstepping controller-observer design for the trajectory tracking control of robotic manipulators. Most of robot manipulator controllers require position measurements as well as velocity measurements to achieve their control goals, but a lot of robotic systems do not have the velocity measurement devices. Therefore, a velocity observer by backstepping is employed to...
The aim of this paper is to develop a sliding mode control (SMC) with extended Kalman filter (EKF) observer for a five-phase permanent magnet synchronous machine (PMSM). Using sliding mode approach, the resulting control scheme is going to have some advantages such as disturbance rejection, strong robustness and simple implementation. On other side, the Kalman filter based algorithm has demonstrated...
The emergence of the new standard HEVC (High Efficiency Video Coding) is accompanied with serious problems related to resource consumption and encoding time. The proposal of new tools and optimizations is strongly recommended to ensure the integration of this new encoder in various platforms and multimedia applications. In this context, Kvazaar HEVC encoder is introduced to overcome the problems related...
A method for optimal sizing of hybrid system consisting of aPhotovoltaic (PV) panel, diesel generator, Battery banks and load is considered in this paper. To this end a novel approach is proposed. More precisely a methodology for the design and simulation of the behavior of Hybrid system PV-Diesel-Battery banks to electrify an isolated rural site in southern Algeria Illizi (djanet). This methodology...
The resistance of a mechanical structure such as the bone depends not only on its mechanical properties but also on its geometry, if well that the architecture of the bone and some geometrical parameters likely to influence bone strength. The main ob ect of this work is to assess the mechanical characteristics of the bone structure in its entirety by numerical model updating using the experimental...
In this paper, an adaptive fuzzy variable structure control approach is developed for a class of uncertain multi-input and multi-output (MIMO) nonlinear systems. The MIMO system under study is a strict-feedback uncertain nonlinear system with non-symmetric input nonlinearities. Variable structure control (VSC) technique in combination with backstepping is proposed to tackle the input saturation and...
Epilepsy is one of the most prevalent neurological disorders in human beings. It is characterized by recurring seizures in which abnormal electrical activity in the brain causes the loss of consciousness or a whole body convulsion. The seizure detection is an important component in the diagnosis of epilepsy to figure out the causes, mechanisms and treatment. In the clinical practice, this detection...
In this paper, the concept of the algebraic observer is applied to Proton Exchange Membrane Fuel Cell (PEMFC) system. The aim of the proposed observer is to reconstruct the oxygen excess ratio through estimation of their relevant states in real time from the measurement of the supply manifold air pressure. A robust differentiation method is adopted to estimate in finite-time the time derivative of...
In order to study the reasonable displacement calculation mode of gravity structure, and explore the influence of surrounding soils on the stress and deformation of structure, three calculation modes are established in this paper to analyze the stress and deformation of structure, which are the finite element method (FEM), the limit equilibrium method (LEM) and the elastic bearing method (EBM). The...
Coaxial-rotor configuration with the compact structure and vertical take-off ability make itself a good configuration to execute highly difficult task. In this paper, the structural design of coaxial-rotor system is introduced, and we discuss the control principle behind coaxial configuration. Then, the dynamic modeling is presented based on the combination of considering two rotors as dynamics model...
In this paper, an adaptive fuzzy variable structure control approach is developed for a class of uncertain multi-input and multi-output (MIMO) nonlinear systems. The MIMO system under study is a strict-feedback uncertain nonlinear system with non-symmetric input nonlinearities. Variable structure control (VSC) technique in combination with backstepping is proposed to tackle the input saturation and...
In In this work, we propose a new design approach based on bat algorithm for optimal design of proportional derivative controller for the stabilization of a Quadrotor. To stabilize the angles (roll, pitch and yaw) and heights of the Quadrotor a decentralized control structure is adopted where four proportional derivative (PD) controllers are used. Their parameters are given simultaneously by BAT algorithm...
Despite the great development in modeling the I-V characteristics of the PV module, the outdoor conditions variations still the main difficulty to predict its performances. In this work, anew approach proposed to reconstruct the I-V characteristic of a PV module under variousreal conditions of irradiance and temperature. Based on the characterization tests data, carried out on four different PV modules...
Nowadays the decrease of energy consumption is a world target and it is no longer feasible to design a system without concerning to the energy optimization. An important energy consumer is associated with building heating systems. The main objective of this paper is to make a comparative study between two neural network architectures; the first is not recurrent, Radial Basis Function (RBF) and the...
Aerial robotics is a very exciting research field dealing with a variety of subjects, including the attitude control. This paper deals with the control of a four rotor vertical take-off and landing (VTOL) Unmanned Aerial Vehicle. The paper presents a mathematical model based on the approach of Lagrange for the flight control of an autonomous quad-rotor. It, also, describes the controller architecture...
In this paper, we try to make an author identification of two ancient Arabic religious books dating from the 6th century: The holy Quran and the Hadith. The authorship identification process is achieved through four phases which are: documents collection, text preprocessing, features extraction and classification model building. Thus, two series of experiments are undergone and commented. The first...
To facilitate the application of foldable scissor-like element in engineering domain, this article focuses on the design of 3-loop expandable mechanism. The property of angulated element is revealed first to contribute to the modeling of theoretical model with 3-loop, and the concept of four expandable angulated elements sharing one square adaptor is then introduced to build the mechanical system...
In this work, we address the problem of human body pose recognition using RGB-D sensor, to perform user tracking by a mobile robot. User's skeleton joints orientations are used in this approach to compute torso joint orientation, which is necessary to distinguish the four poses: Face, Back, Right of Left. In addition, a face recognition method is used to re-identify user when lost from camera field...
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