Frédéric Wurtz

Steps to an electrical design environment

The authors first describe the context of their work, and the background that leads them to go towards a design environment. Then they define a specification sheet for a design environment: problems to be solved, and help to be given. Thus they extract from their background and from the specification sheet, the concepts fitting those descriptions. The realisation of the environment relies on new technologies that are listed on this paper. Finally they present some results obtained while testing a critical feature in Java: the calculation time.

MAS architecture for energy management: Developing smart networks with JADE platform

This paper contributes to the design of intelligent electrical network system. A distributed management and control approach, realized through the Multi Agent Systems (MAS) technology, is proposed for Smart Electrical network, due to the MAS advantages: scalability, openness, reliability and communications efficiency. Each agent is embedded into a principal actor and cooperates and coordinates its actions in order to find acceptable near optimal solution. This system proposes multi-level control architecture composed of two main complementary mechanisms: adjustment and anticipative. This paper details the anticipation level that computes the best future set-points according to energy needs and production capacity. These set points are then adjusted in real time by the adjustment mechanism. The platform JADE is used in order to simulate the behavior of the different network actors.

Optimization of an electrical system using Pareto borders of each component. Application to an automotive drive chain

Pareto borders are used to represent the best compromise, for a component or a system, between the objectives in multi-objective optimization. This paper presents also a method which will allow determining the global Pareto border of the system by integrating those of components in function of global parameters. Our approach uses the Pareto border as an intermediate between the components design phase and the systems one. We apply this method to a particular system with the objectives: minimizing the system weight and maximizing the system efficiency

Mixing of FEM and Analytical Modeling: Preliminary Design of a Transformer

We are interested in this paper in methodologies of preliminary design. We applied our study on the optimization of a three-phase transformer. Preliminary design requires low time cost. Although analytical models answer this issue, they brought some loss of quality, as they are subject to many hypotheses. Analytical model can be mixed with numerical ones to improve the modeling quality. The originality of this paper is that we used different modeling methods and software to perform a better design. In this paper, we compared transformer optimizations with 5 different specifications sheets, using two models. On the one hand, a pure analytical model was used, with an automatic symbolic differentiation. On the other hand, we have introduced a FEM evaluation of the leakage reactance in the analytical model. This second model has been implemented using software links and numerical differentiation, which are also discussed.

Concurrent design versioning system, based on XML file

Electrical engineers are interested in sharing knowledge with other disciplines like mechanics, thermal, etc.. Indeed, to design an electromechanical product requires more and more skills leading naturally to the concurrent design. A collaborative work, based on several exchanges (like data, expert rules, negotiations), by mainly using Internet protocols, needs dedicated supports, lighter than technical data management system and more dynamic. In this way, the paper proposes a software called Concurrent Design Versioning System (CoDVS). It is based on XML semi-structured file standard and concurrent versions system (CVS) concept. The software allows designer to exchange information and to work in a collaborative design process. This information is versioned as the nodes of an XML tree. The paper briefly reviews several versioning methods and details the CoDVS software.

Dimensionnement optimal d’un réseau électrique aéronautiqueComparaison entre différentes stratégies de conception

DES AVIONS PLUS ELECTRIQUES MEA 2015 72 REE N°1/2016 Introduction Dans le contexte de l’avion plus electrique [1], les reseaux electriques embarques sont en pleine evolution du fait de l’integration continue de nouvelles technologies qui modi- fient en profondeur les architectures et le fonctionnement de ces systemes [2], [3]. Cette evolution necessite une mise a jour des methodes et outils utilises tout au long de la du- ree de vie d’un systeme et en particulier dans la phase de conception [4], [5]. Conventionnellement, on se base sur des approches d’analyse et sur l’expertise des equipes d’ingenierie avec une penetration progressive des methodes d’optimisation a l’echelle locale, pour quelques equipements [6]. Chaque sous-systeme du reseau est dimensionne independamment des autres sous-systemes par son equipementier qui utilise son propre modele et ses propres outils, cette approche de conception classique est connue sous le nom de « l’approche mecaniste ». L’approche diametralement opposee a cette vision me- caniste consiste a regrouper l’ensemble des sous-systemes dans un seul modele gere par une seule et unique b

Optimization Techniques Benefits for Magnetic Component Design

Benefits of optimization techniques applied to magnetic component design are discussed here, using a comparison between an industrial hand-based design process and a methodology based on constrained optimization techniques. The results show dramatic design time decrease, as well as design process improvements in terms of reliability and formalism, which has to be balanced against encountered difficulties.