Examinando por Autor "Angulo, L. D."

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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.
Acceso Abierto
Time Domain Simulation of Common Mode Ferrite Chokes at System Level
(Institute of Electrical and Electronics Engineers, 2023-09-11) Gascón Bravo, Alberto; García, S. G.; Muñoz Manterola, Alejandro; Añón Cancela, M.; Moreno, Roberto; Tekbaş, Kenan; Angulo, L. D.; Instituto Nacional de Técnica Aeroespacial (INTA); Ministerio de Ciencia e Innovación (MICINN); European Commission (EC); Universidad de Granada (UGR)
This article introduces a comprehensive methodology for analyzing common-mode (CM) ferrite chokes in time-domain (TD) methods, employing lumped dispersive loads, and validates it through a typical test setup for cable crosstalk assessment. The analysis begins with the experimental characterization of CM choke material properties using a coaxial line fixture to obtain its constitutive parameters. Subsequently, a simplified lumped dispersive convolutional model is obtained, representing the impedance of the ferrite when placed on a location on the cable. The first approach adopts a multiconductor transmission line (MTL) model for the cables, solving them by a finite-difference (FDTD) space-time scheme. The second approach utilizes the classical full-wave Yee-FDTD method in conjunction with the thin-wire Holland model for cables. The accuracy of the proposed methods is evaluated by comparing simulations performed with MTL-FDTD and Holland-Yee FDTD, to experimental measurements, and results obtained with the the frequency-domain finite element method using a 3-D model of the ferrite with its constitutive parameters. Finally, the validity and performance of the methodologies are critically discussed.