French EMC symposium, Paris, 9-11 July 2018
AXESSIM and ONERA participated to the French EMC symposium, Paris, 9-11 July 2018, and presented a paper entitled: “SIMULATION EM COOPERATIVE SUR UN SYSTEME D’INTERCONNEXION DANS UNE STRUCTURE MASSIVEMENT COMPOSITE” by S. Bertuol, I. Junqua, J.P. Parmantier, N. Muot, T. Strub, C. Giraudon.
This paper presents the application of an EPICEA cooperative scenario based on the Field-to-Transmission-Line model applying the Agrawal model. It presents the numerical tools as well as the EPICEA computer platform that allows playing this scenario. Results are demonstrated on EPICEA’s NTC2 (Numerical Test-case 2), a 3-volume composite carbon rectangular 3D structure equipped with a multiconductor wiring network and a current return network. The 3D calculations are made in FDTD with ONERA’s ALICE software and the MTLN calculations are made either in the frequency domain or in the time domain respectively with ONERA’s CRIPTE or AxesSim’s MILO software modules. When the wiring is simplified to one-wire branches validations with full 3D calculations with embedded thin-wire models are possible; some example are showed in the paper. Calculation configurations concern current injection on the 3D structure (indirect effects of lightning) and place wave illumination (HIRF).
EPICEA public workshop, 17 April 2018, Montreal, Canada
The EPICEA project held its public workshop on 17 April 2018 in Montreal at partner Bombardier offices in Canada.
EPICEA M18 European Contractual Review, 19 September 2017, CLORA, European Commission, Brussels
The EPICEA project held its M18 European Contractual Review on 19 September 2017 in Brussels at CLORA with the European Commission.
EMC Europe 2017
ONERA attended the last EMC EUROPE 2017 symposium, organized by ESEO in Angers, France (5th-7th September 2017). EMC Europe is the annual major event for the EMC community in Europe with about 450 attendants coming from the academic and industrial world. ONERA took this great opportunity to present the scientific work carried out in EPICEA in a general session dedicated to “transmission lines” with a paper entitled: “Distributed Voltage sources on transmission lines – Unified low frequency model” by J-P. Parmantier, I. Junqua, S. Bertuol and P. Schickele.
This paper addresses the question of modelling voltage source terms when applying Agrawal’s Field-to-transmission Line model in a numerical procedure involving a 3D full wave solvers and Multiconductor Transmission-line Network solvers based on the BLT equation. It particularly stresses the fact that the prima facie model consisting in integrating voltage sources along cells larger than usual criterion of lambda/10 is not valid for some conditions of end loads of the transmission-line. Low frequency applications of simple lines in short-circuit/open circuit allow analytical analysis of the problem. This is a reason why a unified model of equivalent sources is developed here for any type of load conditions and for low frequency applications. Different validations have been carried out applying the CRIPTE code and various illustrations have been presented.
XXXIInd URSI-General Assembly and Scientific Symposium, Montreal, QC, August 2017
Polytechnique attended the 32nd general assembly of the International Union of Radio Science held in Montreal, August 2017. Walid Dyab, postdoctoral fellow at Polytechnique, conducted a 20-minutes oral presentation within a session on electromagnetic compatibility in complex systems. This general assembly and scientific symposium is held every three years and gathers researchers from diverse disciplines in the field of radio science. Polytechnique, with the help of all EPICEA partners took this opportunity to publicize the scientific activities taking place within the frame work of EPICEA.
The presentation was titled “Scalable modelling strategy for EM interactions in composite electric aircrafts”. The technical focus was on the hierarchy of the EPICEA platform and specifically on the modeling of interconnected systems within the platform. The frequency bands of interest were explained as well as the way they are divided into low, medium and high frequency bands. Different modules of the EPICEA platform were presented and specific plans for validation based on lab tests were explained.
ONERA participated to ASIAEM 2017 in Bengalore, India, 24th-27th July 2017. This conference is the Asian edition of the series of AMEREM and EUROEM conferences held in the USA and Europe respectively. As far as the interest for the EPICEA project is concerned, these conferences gather the scientific community of High Power Electromagnetics (HPE) that include lightning and HIRF particular topics. ONERA gave a general presentation of EPICEA focusing on the activity of EM coupling on interconnected systems in massively composite aircraft structures. The modeling methodology based on the EPICEA platform, the computer modules and scenarios as well as material models were introduced. Questions mainly concerned the way to account for the common mode impedance brought by the structure with the common impedance junction concept introduced in a MTLN network model. Other contacts have been established with EM sensor developers that could get in touch with Bombardier Aeronautics for their future EM tests on aircraft and with users of the CRIPTE software in India for the future applications of this software.
CASI AERO 2017, Toronto, ON, May 2017
Polytechnique attended the 63rd Aeronautics conference sponsored by the Canadian Aeronautics and Space Institute. The conference was held in Toronto, May 2017. The submitted extended abstract was presented in a poster session by Ahmed Sakr, a PhD candidate at Polytechnique. The presentation was titled, “Multi-scale computation methodologies for electromagnetic scattering from structures made of composite materials for aircraft modelling”. The conference gathered major industrial organizations from the field of aerospace manufacturing.
The technical work presented by Polytechnique was focused on the theoretical aspects of solving electromagnetic scattering problems for composite materials. The main concern is how to characterize the composite material based on its microscopic structure. Then the concern is how to represent interleaved multi-layers of composites by single homogenized effective permittivity and conductivity material models. The question of interest is whether the homogenized parameters should be isotropic “scalar” or anisotropic “tensor” quantities. From discussions within the conference, it is concluded that due to mechanical restrictions some critical parts in the body of a composite aircraft must have the carbon fibers of the composite material aligned specifically in one direction to satisfy specific stress-handling requirements. As far as Electromagnetics is concerned, this means that the composite material in those parts must be modeled as anisotropic material. The presented paper proposed a simplified simulation technique for such anisotropic composite structures.
EPICEA M12 General Assembly Meeting, 1-3 February 2017, Pisa, Italy
The EPICEA project held its M12 General Assembly meeting on 1-3 February 2017 in Pisa at IDS’s offices in Italy.
8th CARIC Research Forum took place on 27 April 2016
A poster of the EPICEA project was presented at the 8th CRIAQ Research Forum, organized in collaboration with CARIC.
EPICEA kick off meeting, 1-3 February 2016, Montreal, Canada
The EPICEA project held its kick off meeting on 1-3 February 2016 in Montreal at partner Bombardier offices in Canada.
The EPICEA project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 689007.