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Bozzetti M.,Alenia Aermacchi | Girard C.,AxesSim | Hoque A.,L Up | Marvin A.,University of York | And 4 more authors.
IEEE International Symposium on Electromagnetic Compatibility | Year: 2012

HIRF SE (High Intensity Radiated Fields Synthetic Environment) is a computational tool for the simulation and analysis of electromagnetic field interaction with aircraft and rotorcraft in HIRF radio frequency range (10 kHz-40 GHz). The tool allows the simulation of air vehicle interaction with both far-field and near-field sources having any polarization and position in the presence or not of the ground, and it will be applied during design and certification phases in order to cope with the increasing complexity of air vehicles electronic/electric architectures and of the electromagnetic environment. The research leading to these results has received funding from the European Community's Seventh Framework Programme [FP7/2007-2013] under grant agreement no. 205294. © 2012 IEEE.

Helluy P.,University of Strasbourg | Massaro M.,University of Strasbourg | Navoret L.,University of Strasbourg | Pham N.,University of Strasbourg | Strub L.T.,AxesSim
Progress in Electromagnetics Research Symposium | Year: 2014

We describe CLAC (Conservation Laws Approximation on many Cores), a generic Discontinuous Galerkin (DG) solver for three-dimensional electromagnetic simulations. The solver runs on clusters of GPUs, it is based on hybrid parallelism using the OpenCL and MPI libraries. We explain how to solve the Vlasov-Maxwell equations with this tool. We present several numerical results.

Andrieu G.,XLIM Laboratory | Panh J.,French National Center for Space Studies | Reineix A.,XLIM Laboratory | Pelissou P.,Airbus | And 4 more authors.
IEEE Transactions on Electromagnetic Compatibility | Year: 2014

Improvements of a methodology [1] able to compute the parasitic electromagnetic emissions of a solar panel are presented in this paper in order to handle real solar panels. Thus, the method is able to take into account solar panels with triple-junction solar cells, series or shunt power regulation system, and honeycomb composite panels. This numerical method is validated experimentally by comparing the near magnetic field emitted by a real solar panel and calculated by the method. © 2014 IEEE.

Andrieu G.,Xlim Laboratory | Panh J.,French National Center for Space Studies | Reineix A.,Xlim Laboratory | Pelissou P.,Airbus | And 3 more authors.
IEEE Transactions on Electromagnetic Compatibility | Year: 2012

A simple method permitting to obtain a homogeneous panel from a strongly inhomogeneous panel is presented. The method consists of determining the characteristics of a panel having an equivalent conductivity obtained from a near-field magnetic shielding effectiveness measurement. Thus, the method suitable for frequencies lower than 1MHz does not require the knowledge of the detailed internal geometry of the sample. After the validation of the measurement setup on a copper plate of known conductivity, two space composite panels are characterized and homogenized. © 2012 IEEE.

Andrieu G.,Xlim Laboratory | Panh J.,French National Center for Space Studies | Reineix A.,Xlim Laboratory | Pelissou P.,Airbus | And 4 more authors.
Proceedings of the 2012 ESA Workshop on Aerospace EMC 2012 | Year: 2012

The methodology [1] able to compute the parasitic electromagnetic (EM) radiations of a solar panel is highly improved in this paper to model real solar panels. Thus, honeycomb composite panels, triple junction solar cells and serie or shunt regulation system can now be taken into account. After a brief summary of the methodology, the improvements are detailed. Finally, some encouraging frequency and time-domain results of magnetic field emitted by a real solar panel are presented. © 2012 ESA.

Pelissou P.,Astrium Satellites | Delannoy P.,Astrium Satellites | Romeuf X.,AxesSim | Laget P.,European Space Agency
Proceedings of the 2012 ESA Workshop on Aerospace EMC 2012 | Year: 2012

The purpose of this paper is to present a high fidelity simulation tool named "EMCASL" able to predict the disturbances conducted on the power bus of a spacecraft, and more generally, of any complex system. This advanced simulation tool handles the 'conducted noise' electromagnetic compatibility among the various units and subsystems of the satellite and enables engineers to evaluate the effects of EMI on flight system, so that potential EMC problems can then be identified and solved in a timely manner. The system noise model is based on time and frequency domain equipment measurement in both differential and common mode and on appropriate behavioural modelling of any power conditioning and distribution units. The tool has been developed by Astrium Satellites and AxesSim in the frame of an ESA contract 22990/09/NL/GLC. © 2012 ESA.

Muot N.,AxesSim | Bachelier E.,ONERA | Ferrieres X.,ONERA | Girard C.,AxesSim
Progress in Electromagnetics Research Symposium | Year: 2011

In term of application for large and complex systems, many hybridizations and multidomain approaches have been studied in different ways and have shown their capabilities to deal with electromagnetic problems. However, as far as we are interested in applications like lightning electromagnetic induced effects on buildings, interconnected by powerlines or communication networks, the usual multidomain methods needs to be improved. For those problems, the challenge is to reduce the computational problem size (for the area) between buildings. The problem is to take into account the interactions between soil, buildings and cables, without a 3D meshing of the global scene. The paper presents a multidomain strategy based on a hybrid approach in the time domain: by coupling 3D methods (FDTD, FVTD . . . ) with a transmision line method, first step of the general problem. The idea is to define a 3D problem around each building and a 1D problem along the transmission line. Then, the hybridization strategy consists in making exchanges of some quantities at each interface between the two problems. In our way of coupling, the considered interfaces are reduced to a dipole on which we propose to exchange data of both domain by the introduction of a local Thevenin equivalent circuit. Through the impedance, the local condition of continuity at the virtual interface of the line is ensured. On the other hand, the generator send the signal relative to the other computational domain. Considering the applied problem we are interested in, the next step to be investigated is the effect of the soil conductivity on the induced effects, between buildings, grounding and networks. The paper will also present the actual fields of investigation for these specific aspects.

Muot N.,AXESSIM | Girard C.,AXESSIM | Ferrieres X.,ONERA | Bachelier E.,ONERA
Progress In Electromagnetics Research B | Year: 2013

Modeling complex networks of cables inside structures and modeling disjoint objects connected by cables inside large computational domains with respect to the wavelength are two problems that currently present many difficulties. In this paper, we propose a 1D/3D hybrid method in time domain to solve efficiently these two kinds of problems. The method, based upon finite difference schemes, couples Maxwell's equations to evaluate electromagnetic fields in 3D domains and the transmission line equations to evaluate currents and voltages on cables. Some examples are presented to show the interest of this approach.

Muot N.,AxesSim | Girard C.,AxesSim | Bachelier E.,ONERA | Ferrieres X.,ONERA
2012 31st International Conference on Lightning Protection, ICLP 2012 | Year: 2012

In this paper, we present a strategy based on a multi-domain hybrid approach in the time domain by coupling 3D methods (FDTD, FVTD⋯) with a transmission line (TL) method to simulate large-scale electromagnetic problems. The paper gives the main keys to couple together the numerical methods based on different formulations. The challenge is first to have an implicit definition of the electromagnetic field in the theory of transmission lines, and secondly to take into account the effects of the soil on the induced currents and on the electromagnetic field. The aim of this work is to propose an efficient numerical strategy to compute the electromagnetic induced effects of lightning on large and complex sites, composed of several interconnected distant buildings. © 2012 IEEE.

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