Towards the generation of industrial bundles through a random process under realistic constraints

International audienceTo get closer to the reality of aeronautics wire harnesses, we propose to represent a bundle as a non-uniform transmission line by discretizing it into several sections. For each section, positions of conductors are randomized. However this procedure is applied with some geometrical constraints thus resulting in a much more realistic bundle profile. Currents and voltages may be determined on each conductor. Then, we use statistical tools to analyze our results. In order to save computation time, we also propose simplified models for simulation studies of the common mode current

La société de l’information ou la religion de l’insignifiance

Je voudrais tout d’abord faire état d’un scrupule et formuler une interrogation : on ne rend pas justice aux acteurs de la société de l’information (par exemple, les concepteurs de sites Web, les experts en référencement, en indexation, en nomenclatures, en syndication de contenus, les ingénieurs en technologie cognitive et autres spécialistes des bases de données numériques) – on ne rend pas justice à ces professionnels quand on s’en tient aux seules représentations intellectuelles que génèr..

Crosstalk analysis in complex aeronautical bundle

International audienceAn analysis of crosstalk inside a complex aeronautical bundle from an experimental and from a numerical point of view is proposed. The numerical model is built as a succession of uniform transmission lines generated randomly. Modeling of the geometrical pattern of twisted pairs is included. Crosstalks between these twisted pairs and single wires inside the bundle are measured and computed. In order to save computation time, a simplified model of the bundle is developed and validated

Aperture antenna modelling by a finite number of elemental dipoles from truncated spherical field measurement: Experimental investigation

International audienceA method to determine a distribution of a finite number of elementary dipoles that reproduce the radiation behaviour of the antenna under test (AUT) from truncated spherical field measurements is proposed. It is based on the substitution of the actual antenna by a finite number of equivalent infinitesimal dipoles (electric and magnetic), distributed over the antenna aperture. This equivalent set of elementary dipoles is optimized using the transmission coefficient involving the spherical wave expansion of the measured field and using an appropriate matching method. Once the current excitation of each dipole is known, the radiated field of the antenna at different distances can be rapidly determined. The reliability and the accuracy of the method are shown using experimental data issued from the measurement of an X-band horn antenna, in two different measurement setups