Examinando por Autor "Rubio Bretones, Amelia"

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A subcell FDTD Scheme implementation for thin slot modeling
(Institute of Electrical and Electronics Engineers, 2022-07-08) Cabello, M. R.; Martín Valverde, A. J.; Plaza Gallardo, Borja; Frövel, Malte; Poyatos Martinez, David; Rubio Bretones, Amelia; González García, S.; Instituto Nacional de Técnica Aeroespacial (INTA); Ministerio de Ciencia e Innovación (MICINN); Agencia Estatal de Investigación (AEI); Junta de Andalucía
The finite-difference time-domain (FDTD) method is not able to efficiently model thin features without a drastic reductions of the spatial mesh size, potentially yielding an unfeasible use of memory and CPU requirements. In this work we propose two stable and efficient techniques for dealing with thin apertures in FDTD, one based on conformal and one based on subgridding. These are compared, in two different scenarios, with the classical dispersive magnetic material approximation [DMMA] based on Gilbert-Holland's models.
Acceso Abierto
A Subcell Finite-Difference Time-Domain Implementation for Narrow Slots on Conductive Panels
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-08-03) Ruiz Cabello Núñez, M. D.; Martín Valverde, A. J.; Plaza Gallardo, Borja; Frövel, Malte; Poyatos Martinez, David; Rubio Bretones, Amelia; Gascón Bravo, Alberto; García, S. G.; Instituto Nacional de Técnica Aeroespacial (INTA); Ministerio de Ciencia e Innovación (MICINN)
Efficiently modeling thin features using the finite-difference time-domain (FDTD) method involves a considerable reduction in the spatial mesh size. However, in real-world scenarios, such reductions can lead to unaffordable memory and CPU requirements. In this manuscript, we present two stable and efficient techniques in FDTD to handle narrow apertures on conductive thin panels. One technique employs conformal methods, while the other utilizes subgridding methods. We validate their performance compared to the classical Gilbert-Holland model and present experimental results in reverberation environments to shed light on these models’ actual confidence margins in real electromagnetic compatibility (EMC) scenarios.
Restringido
Numerical assessment in aeronautics for electromagnetic environmental effects
(IGI Global Publisher of Timely Knowledge, 2018-01-05) Ruiz Cabello Núñez, M. D.; Fernández Romero, S.; Pous Solà, M.; Poyatos Martínez, D.; Fernández Chimeno, M.; Gutierrez, Guadalupe G.; Rubio Bretones, Amelia; Añón Cancela, M.; Ferran, Silva; Álvarez, Jesús; Fernández Pantoja, Mario; Nuño, Luis; Gómez Martín, Rafael; Escot Bocanegra, D.; Rui Costa, Pere J.; Trallero, Rafael; Jauregui Telleria, Ricardo I.; González García, Salvador; Pous Solà, M. [0000-0003-2660-5254]; Silvia Martínez, F. [0000-0003-3019-3993]; Fernández Chimeno, M. [0000-0001-8384-1320]; Rui Costa, P. J. [0000-0003-0477-1972]
Electrical and electronic systems on board air vehicles are susceptible to electromagnetic interference (EMI). This has made the topic of electromagnetic compatibility (EMC), a major concern for aircraft safety. The use of composite materials worsens this situation, for their poor shielding and low conductive capabilities. Some of the main experimental E3 certification scenarios used in aeronautics are revisited in this chapter. Guidelines to achieve simple, yet accurate, numerical models of them are provided, with appropriate tradeoffs between computational simplicity and accuracy. The numerical method, endowed with extended capabilities, has been chosen for this task for its ability and efficiency to deal with complex problems of arbitrary materials. The feature selective validation (FSV) IEEE standard procedure, commonly used to quantify the comparison of data in electromagnetic problems, is also revisited. The simulation of three different air vehicles in several certification scenarios is finally described and the numerical results compared to experimental data.
Restringido
SIVA UAV: A Case Study for the EMC Analysis of Composite Air Vehicles
(Institute of Electrical and Electronics Engineers, 2017-01-31) Cabello, M. R.; Fernández Romero, Sergio; Pous Solà, M.; Pascual Gil, E.; Angulo, L. D.; López, Patricia; Riu, Pere J.; Gutierrez, G. G.; Mateos, D.; Poyatos Martinez, David; Fernández Chimeno, M.; Álvarez, J.; Pantoja, M. F.; Añón Cancela, M.; Silva, F.; Rubio Bretones, Amelia; Trallero Vela, R.; Nuño, L.; Escot Bocanegra, D.; Gómez Martín, R.; García, Salvador G.
The increased use of carbon-fiber composites in unmanned aerial vehicles is a challenge for their EMC assessment by numerical solvers. For accurate and reliable simulations, numerical procedures should be tested not only for individual components, but also within the framework of complete systems. With this aim, this paper presents a benchmark test case based on experimental measurements coming from direct-current injection tests in the SIVA unmanned air vehicle, reproduced by a numerical finite-difference-time-domain solver that employs a new subgridding scheme to treat lossy composite thin panels. Validation was undertaken by applying the feature selective validation method, which quantifies the agreement between experimental and numerical data.