Ridha Kelaiaia

• PhD
• Professor (Full) at University of Skikda

This paper deals with the improvement of the accuracy design of the Gough-Stewart platform. To this end, two steps are considered: the first is modelling the positioning error of the manipulator using an analytical method; In the second one, in order to determine the primary error sources of the manipulator, a new sensitivity analysis method is pro...

Due to the increasing number of people suffering from walking disorders, physiotherapy is becoming the process of treating this dysfunction and helping people to recover their natural motor ability as much as possible. Due to the lack of therapists, rehabilitation robots aim to reduce their tasks, help patients recover their natural walking ability...

Lubricated mechanical mechanisms operate under service conditions influenced by several environmental parameters, and their lifetimes may be threatened due to inappropriate use or by the presence of solid contaminants. The objective of this work is to study the effect of three operating parameters, namely: rotational speed 𝑉, load 𝑄 and kinematic v...

This paper discusses the impact of the feature input vector on the performance of dissolved gas analysis-based intelligent power transformer fault diagnosis methods. For this purpose, 22 feature vectors from traditional diagnostic methods were used as feature input vectors for four tree-based ensemble algorithms, namely random forest, tree ensemble...

Robotic systems require high accuracy in manipulating objects. Positioning errors are influenced by geometric tolerances and various sources. This paper introduces a new technique based on the interior-point algorithm optimisation method to allocate tolerances to the geometric parameters of a robot. This method consists of three steps. First, a met...

This paper discusses the impact of the feature input vector on the performance of DGA-based intelligent power transformer fault diagnosis methods. For this purpose, 22 feature vectors from traditional diagnostic methods were used as feature input vectors for four tree-based ensemble algorithms, namely random forest (RF), tree ensemble (TE), gradien...

Modern industrial processes make extensive use of electric induction motors; timely fault diagnosis of such equipment is a critical phase that allows planning effective predictive maintenance which can significantly reduce downtime and optimize productivity. In this study, we present a novel technique for the diagnosis of both simple mechanical and...

In order to actively control combustion reaction, this study proposes an adaptive neuro-fuzzy (ANFIS) control scheme of interaction between premixed combustion reaction and acoustic flame perturbation where the flame pressure movement will be considered as model perturbation. Using the Cantera database, it is possible to investigate the mechanisms...

Optimal dimensioning is a fundamental problem in the design of Parallel Manipulators (PMs). However, this problem is revealed to be very hard to solve because many PM performance criteria are antagonistic. In addition, the required technical specifications can be difficult to obtain because they are usually dependent on the end-effector posture and...

Human movement analysis takes on great importance in the field of research related to artificial intelligence because it is used in many applications such as sports and rehabilitation. Human action analysis may be accomplished by antici-pating the body’s essential posture. The two most important parts of video-based human action analysis are recogn...

Early and correct diagnosis of faults in power transformers (PTs) are important aspects of electrical system maintenance. In addition to insulation and cooling functions, insulating oil contains the by-products of degradation and ageing reactions of the insulation system and related components inside the PT. In addition to sludge, water and acids,...

The many epidemics that the world is witnessing necessitate the use of telehealth. Developing a website for telerehabilitation follow-up is appealing. Furthermore, the patient benefits financially from the elimination of costly equipment. The major purpose of this paper is to present a telerehabilitation website and to compare an artificial intelli...

The world is witnessing interesting challenges in several fields, including medicine. Solutions to many of these challenges are being developed in the field of artificial intelligence. As a result, artificial intelligence techniques can be used in telerehabilitation to facilitate the work of doctors and to find methods that can be used to better tr...

Since about two decades, cellular phones coupled to internet and wireless communications are offering many possibilities that can be exploited by classical telerobotics to free human operators from many constraints providing mobility and ubiquitous applications. This paper presents the design and implementation of an experimental telerobotics syste...

Abstracts Book of the ICEE2022

This research focuses on employing Recurrent Neural Networks (RNN) to prognosis a wind turbine operation’s health from collected vibration time series data, by using several memory cell variations, including Long Short Time Memory (LSTM), Bilateral LSTM (BiLSTM), and Gated Recurrent Unit (GRU), which are integrated into various architectures. We tu...

Geometric errors directly affect the position of the end-effector of a Parallel Kinematic Manipulator (PKM), thus reducing its positioning accuracy. However, the tasks that are performed by PKMs, such as high-precision machining using a kinematic model with nominal values, are affected by machine errors that are not taken into account. Therefore, i...

Gas turbines are complex processes characterized by the instability and uncertainty of various sources. The range of useful operating in an axial compressor which is part of a turbine gas is limited by aerodynamic instabilities that are surge and rotating stall. This paper presents two intelligent fractional order sliding mode controllers. At first...

Health and fitness care is one of the most important priorities in research studies. That is why a significant budget has been invested in this domain of research. Robotics technologies have also become an active part of this particular area. The lower limbs are an important part of the body, due to the processes we do daily thanks to them. Because...

Sensitivity analysis of manipulators aims at studying the influence of variations in its own geometric parameters on its performance. This information is useful for evaluating the position error of the end-effector as well as for the synthesis of tolerances. Indeed, the synthesis of tolerances is a very important issue in the design and manufacturi...

This paper is concerned with the analysis of the tracking capability of Relay Feedback Control Systems (RFCS). The envisioned application is the generation of PulseWidth-Modulation (PWM) with variable duty-cycle and frequency known also as DutyCycle Modulation. In general, two main issues have to be solved with RFCS when used for regulation and tra...

Photovoltaic energy is volatile in nature since it depends on weather conditions. It is important to have an idea about the reliability and the economic feasibility of any new project to decide whether it is right to proceed with the installation of such a project. Hence, it is becoming fundamental to know renewable energy state and production that...

The simulation of anaerobic bioreactors of batch type for the methane production according to the AM2 mathematical model reveals a strong sensitivity of the results (variation of the concentrations of substrates, bacterial evolution and flow of methane production) with respect to the variations of the model parameters. To highlight this sensitivity...

This paper deals with the predictive capabilies of a NARX-based forecaster used to predict the output power converted with a PV panel in isolated conditions. A timeseries based NARX model is proposed and the influence of the meteorological data such as irradiance, ambient temperature and wind speed, and the impact of the training algorithm on the p...

Some dynamical linear elements including on-off elements such as electro-mechanical relays and electronic components used in switching mode for some feedback control systems can present special features such as the capability to autonomously generate stable self-oscillations. This paper concerns the comparison of two approaches enabling to determin...

Effect of Environmental Conditions and Training Algorithms on the Efficiency of a NARX Based Approach to Predict PV Panel Power Output

To establish an exercise in open muscular chain rehabilitation (OMC), it is necessary to choose the type of kinematic chain of the mechanical / biomechanical system that constitutes the lower limbs in interaction with the robotic device. Indeed, it’s accepted in biomechanics that a rehabilitation exercise in OMC of the lower limb is performed with...

This correction has been initiated as author names were incorrectly indicated and should be read as: GABOUR Amina instead of GAABOUR Amina.

The Taylor-Couette flow between two rotating coaxial cylinders remains an ideal tool for understanding the mechanism of the transition from laminar to turbulent regime in rotating flow for the scientific community. We present for different Taylor numbers a set of three-dimensional numerical investigations of the stability and transition from Couett...

This paper discusses a comparison study of the use of 100 % renewable energy systems for desert and remote areas, investigating both a central unique unit and distributed units. An initial HRES consisting of a photovoltaic (PV) array and wind generator is used to power an agricultural area of 4 ha once with a central unit and then with four distrib...

The safety of industrial installations requires real-time monitoring of the occurrence of defects in induction machines that are widely used in this field. The implementation of this type of system typically needs to process a large amount of data provided by sensors and thus necessitates high computing mass, which complicates sensor utilization in...

This paper presents a model predictive control (MPC) for a differential-drive mobile robot (DDMR) based on the dynamic model. The robot’s mathematical model is nonlinear, which is why an input–output linearization technique is used, and, based on the obtained linear model, an MPC was developed. The predictive control law gains were acquired by mini...

The approach adopted in this paper focuses on the faults prediction in asynchronous machines. The main goal is to explore interesting information regarding the diagnosis and prediction of electrical machines failures by the use of a Bayesian graphical model. The Bayesian forecasting model developed in this paper provides a posteriori probability fo...

Due to fast increase in the world of the population and global warming, designing efficient and low-polluting or clean energy systems are one of the critical problems of the century. In the recent years, most researchers are focusing on wind and solar energy sources as they freely available, complementary, their costs are becoming competitive, and...

The significant increase in the electricity demand is a direct consequence of the change in consumption habits, especially because of the use of rising prevalent of air conditioning. Thus, it reveals evident to create peak consumption during summer season. Then, during peak periods, the extra demand on the grid is met by increasing capacity via ope...

This paper aims to determine the optimal size of a PV pumping system used to power an irrigating system. Drip irrigation of a farmland cultivated by tomatoes at the region of Skikda, Algeria is studied. Focusing on the cost of water delivered to crops, different configurations are discussed using the Homer software. Among various combinations the...

Les moteurs électriques asynchrones représentent les machines électriques les plus utilisés. Malgré les développements technologiques et les travaux de recherches réalisés pour empêcher ces appareils à tomber en panne, ils tendent à se détériorer. Cet article expose une contribution pour prévenir les arrêts des machines a synchrones. L'analyse vib...

The 3rd International Conference on Electromechanical Engineering ICEE’2018, November 21-22, 2018 Université 20 août 1955-Skikda Algeria

In gas turbine process, the axial compressor is subjected to aerodynamic instabilities because of rotating stall and surge associated with bifurcation nonlinear behaviour. This paper presents a Genetic Algorithm and Particle Swarm Optimization (GA/PSO) of robust sliding mode controller in order to deal with this transaction between compressor chara...

The International Conference on Electromechanical Engineering, is a good opportunity to present and discuss new trends and exchange knowledge and experiences research progress in various domains of Electromechanical sciences and engineering. Both theoretical and applied papers are welcomed for submission to this event. This conference aims to prov...

This paper assesses the optimal farmland that can be irrigated by a predetermined renewable energy system. The optimal irrigated surface from an agriculture area, cultivated by potatoes and tomatoes and powered by a PV system is studied. Two scenarios are discussed: the constraints applied to the first scenario is the limited surface of the agricul...

Due to fast increase in the world of the population and global warming, designing efficient and low-polluting or clean energy systems are one of the critical problems of the century. In the recent years, most researchers are focusing on wind and solar energy sources as they freely available, complementary, their costs are becoming competitive, and...

Solar panels are gaining importance as the main alternative source of energy in the current conditions of non-renewable energy depletion. Solar panels are increasingly used in large- and small-scale installations. Partial shade is one of the problems that are faced in terrestrial applications of solar photovoltaic. The partial shading reduces the p...

La production de bio-huile par pyrolyse est une des voies thermochimiques les plus prometteuses pour la valorisation de la biomasse lignocellulosique. Dans ce travail, nous présentons une étude de faisabilité d’un procédé de pyrolyse à réacteur à lit fluidisé double pour la production de bio-huile à partir de biomasse lignocellulosique déjà étudiée...

This purpose is about a computational fluid dynamics investigation of a step varying in annular space effect on Taylor vortices flow and velocity in cylindrical Taylor-Couette system. Three cases are considered, the first geometric configuration GCi where the change in radius of the outer cylinder, and the half endplate is replaced by fluid close t...

This paper presents the technique for estimating parameters based on the method of least squares with and without forgetting factor is presented in this work. This technique is applied to power systems with or without faults. An evaluation in numerical simulation of a coil with iron core with or without fault short-circuit of turns, allows discuss...

Abstract: This paper presents a study and a simulation to find the optimal design of a Hybrid Renewable Energy System (HRES) designed for the electrification of a house located in the village of El-Hadaïk near the city of Skikda northeast Algeria. The system consists of two renewable resources: a PV generator and a wind turbine. It also includes tw...

The main objective of this work is to study the elastic deformations affecting Delta parallel robots during machining operations (e.g., milling). These deformations always induce errors on the programmed tool trajectories. A mathematical evaluation model of these errors has been established. Firstly, this model enables the evaluation of positional...

In this paper, the numerical investigation of the flow, which is that, develops in the narrow gap between two concentric short conical cylinders was performed. The annular radial gap is considered constant along of the system for various apex angles and the aspect ratio is Γ = 5. The inner conical cylinder rotates with a constant angular velocity a...

This work presents the study, he numerical simulation, and some experimental analysis of anaerobic bioreactors as well as the estimation of the produced annual energy. A mathematical model corresponding to biotechnological processes of two-phase anaerobic digestion has been implemented to simulate the bioreactor operation.Simulation results allow...

In this paper, we will perform a comparison between two approaches of dimensional synthesis of parallel robots. The first one concerns the single-objective optimization approach; in this case, the dimensional synthesis is expressed by taking into account only one performance criterion but enables to get a final solution if it exists. The second one...

The optimal design of parallel kinematic machines goes through two fundamental stages. The first one concerns the structural synthesis. It enables, a priori, to determine the choice of families of the most adapted architectures according to the desired applications such as flight simulators, machine-tools, medical applications, etc. This can be don...

It is well known that Parallel Kinematic Mechanisms (PKMs) have an intrinsic dynamic potential (very high speed and acceleration) with high precision and high stiffness. Nevertheless, the choice of optimal dimensions that provide the best performances remains a difficult task, since performances strongly depend on dimensions. On the other hand, the...

The dimensional synthesis remains a capital phase in the optimal design of the parallel robots. In this article, we propose a methodology of the dimensional synthesis where the problem is expressed in terms of multiobjective optimization by taking account simultaneously several criteria of performance. The proposed methodology can be structured as...

La conception des machines-outils à architecture parallèle est un problème très difficile car beaucoup de paramètres et de critères doivent être pris en considération; d'autre part les caractéristiques qui peuvent intervenir dans un cahier de charges sont délicates à estimer car elles sont le plus souvent dépendantes de la posture de l’organe termi...