Jamel Louati

Pre-dimensioning of the Dynamic Properties of the Wind Turbine System Using Analytical Approach

The higher complexity of the mechatronical wind turbine system requires taking a great effort from the early stage of the design process. Wind turbine power trains are subjected to a very diverse spectrum of dynamic loads. In order to obtain preliminary information about the dynamic behavior of the wind turbine system and its operating environment, the drive system model is developed in this paper. This model contains flexible and rigid structural components in order to predict the dynamic characteristics of the torsional vibration. All these structural components are systematically coupled in one analysis model, through a simple modeling process in Modelica/Dymola environment. Making the right technology and architectural choices early in the development program, will substantially decrease rework and related costs.

Conceptual Design of an Intelligent Welding Cell Using SysML and Holonic Paradigm

Manufacturing companies are more and more required to implement intelligent infrastructures to handle the dynamic nature of demands and make quick decisions. Very limited research has been reported on holonic control in a flow-line type manufacturing systems such as welding cells.

Analytical approach for the integrated preliminary analysis of mechatronic systems subjected to vibration

This paper presents an analytical study of a simple mechatronic system, composed of an isotropic plate and an electric motor which excites dynamically the structure. The mathematical model is developed using an analytical method based on the Navier approach with the double Fourier series. This method allows determining the influence of various parameters and architectures on the response of the plate. This method can be used for the preliminary design of a mechatronic system, to perform fast and accurate evaluation of the mechatronic design.

The Design and Modeling of an Optimized Mechatronic System Using a Set Based Concurrent Engineering

A mechatronic system consists in a close intersection between mechanics, electronics, control engineering and software engineering. Typically, the controller design and the system design are developed and optimized contemporaneously. However, a poorly designed mechanical system will not at any time be able to hand out a good performance by adding a good controller. Furthermore, to design complex systems, the designers have to follow the traditional point-based development model where one solution is iteratively modified until it fits the specifications. The main problem with the point-based development model lies in the several resets and modifications that return to the previous steps to satisfy the requirements that meet those of the current stage. Therefore, in this paper, we propose to use Set Based Concurrent Engineering to develop a complex system after that we propose to carry a preliminary optimization of the parametric model of the system in the preliminary design before adding the control system. This approach is shown with a simulation model using Modelica for a case study in the automotive field of an Electronic Throttle Body (ETB).

Three‐dimensional quantification of the manufacturing defects for tolerances analysis

Purpose – The purpose of this paper is to present an experimental approach to measure and quantify the three‐dimensional geometrical manufacturing errors on a mass production of parts.Design/methodology/approach – A methodology is developed to model and analyse the combined effect of these errors on a machined feature. Deviation of a machined feature due to the combined errors is expressed in terms of the small displacement torsor (SDT) parameters. Given a tolerance on the machined feature, constraints are specified for that feature to establish a relationship between the tolerance zone of the feature and the torsor parameters. These constraints provide boundaries within which the machined feature must lie. This is used for tolerance analysis of the machined feature. An experimental approach is proposed to measure and quantify the three‐dimensional manufacturing variations as torsors. The results are used to verify the analytical model.Findings – Results show that it is possible to quantify manufacturing ...