VHDL-AMS to support DAE-PDE coupling and multilevel modeling

International audienceWith the increasingly high level of electrical system integration, the modeling of both the system behavior, and the detailed physics of its elements becomes necessary. VHDL-AMS language allows to describe a range of physical systems, such as electromagnetic devices, using a unified design approach to simulate a complete system. In the paper, the behavioral modeling of multiple energy domains is achieved using VHDL-AMS. This illustrated how the interactions between domains take place with an electromagnetic actuator. Then, a multi-level hierarchical modeling methodology, using a V-shaped-based design approach, allows functional modeling, structural behavioral modeling and detailed component modeling

UNIFIED MODELLING TECHNIQUE USING VHDL-AMS AND SOFTWARE COMPONENTS

International audienceThe paper deals with the dynamic modeling of mechatronic devices, which usually need detailed modeling to be described and to take into account the physical properties of the system. VHDL-AMS 1 , which is a powerful unified modeling language for mixed system, allows to describe a large range of physical systems, for their dynamic simulation. It allows to describe models of physical components and then to connect them to obtain the model of a system.. However, this language cannot support the description of some physical phenomena, such local ones, defined by numerical methods (e.g.: finite element method, special numerical integrals). When an aspect of a model cannot be described in VHDL-AMS, the paper proposes to use software components. So, the aim of the paper is to propose a generic way to extend the computation capability of VHDL-AMS, by coupling the models described in VHDL-AMS with external ones specified as software components (where VHDL-AMS fails). The approach has been applied on several applications, among them the time simulation of an electrical plunge

Optimisation des filtres CEM amont et aval pour unredresseur PFC triphasé

International audienceDans le cadre de l'électrification croissante des avions, les efforts pour diminuer le poids des systèmes électriques sont nombreux. La masse des filtres CEM étant de plus de 30 % de celle d'un convertisseur, des dimensionnement optimaux sont recherchés. Or l'approche classique par mesure sans filtre / calcul du filtre nécessaire n'est pas optimale et s'avère même non applicable au cas présenté d'un PFC triphasé. C'est pourquoi une méthode analytique par l'approche source de perturbation / chemin de propagation couplée à des modèles technologiques d'inductance a été mise en place pour dimensionner et estimer la masse des filtres CEM. A l'aide d'une routine d'optimisation, des designs optimaux peuvent ainsi être calculés. De plus, ils sont issus de modèles qui prennent plus en compte la réalité, que l'approche classique

AD for optimization in electromagnetism applied to semi analytical models combining composed functions

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