Persona: Poyatos Martinez, David
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Instituto Nacional de Técnica Aeroespacial
El Instituto Nacional de Técnica Aeroespacial es el Organismo Público de Investigación (OPI) dependiente del Ministerio de Defensa. Además de realizar actividades de investigación científica y de desarrollo de sistemas y prototipos en su ámbito de conocimiento, presta servicios tecnológicos a empresas, universidades e instituciones.
El INTA está especializado en la investigación y el desarrollo tecnológico, de carácter dual, en los ámbitos de la Aeronáutica, Espacio, Hidrodinámica, Seguridad y Defensa.
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Poyatos Martinez
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David
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37 resultados
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Publicación Restringido Spherical Indoor Facility Applied to Bistatic Radar Cross Section Measurements(The EM Academy, 2011-09-09) Escot Bocanegra, D.; Poyatos Martinez, David; Montiel, I.; Adana Herrero, F. M.; González Diego, I.; Instituto Nacional de Técnica Aeroespacial (INTA)A new indoor facility for electromagnetic tests is presented and used here for the specific case of bistatic radar cross section (RCS) measurements. A metallic cube is selected as test case and the results are compared with the predictions obtained with different numerical methods. Good agreement is reported.Publicación Restringido Assessment of FEM simulations in EMC test setups for small aeronautical platforms(Taylor and Francis Online, 2018-08-03) Plaza Gallardo, Borja; Ramajo, O.; López, Daniel; Poyatos Martinez, David; Escot Bocanegra, D.; Agencia Estatal de Investigación (AEI)The rise of fly-by-wire systems together with the utilization of new composite materials make it more and more difficult to assess and guarantee aircraft electromagnetic compatibility (EMC). As a result, the design phase becomes of paramount importance in the aircraft production process. Performing actual EMC tests over different configurations in such a phase would be very costly and time consuming, so reliable computational techniques are being explored in the last years. However, proper validation is needed in order to gain confidence in the results obtained by simulations. In this regard, this paper presents the assessment of a simulation approach based on the finite element method to reproduce typical setups of an EMC test laboratory for small aeronautical platforms. The final test object is based on an unmanned aerial vehicle but, first, a simpler test case is used to tune and assess the simulation approach. Once the approach is both qualitatively and quantitatively validated with measurements, new setups involving the aeronautical specimen are analysed.Publicación Restringido On the Design of a Planetary Protection Shell for EMC Testing on Space Equipment(Institute of Electrical and Electronics Engineers, 2020-06-22) Fernández Romero, S.; Muñoz Rebate, I.; Jiménez Lorenzo, María; Plaza Gallardo, Borja; Poyatos Martinez, David; Díaz Michelena, Marina; Agencia Estatal de Investigación (AEI); Fernández Romero, S. [0000-0002-7169-2222]; Jiménez Lorenzo, M. [0000-0003-1243-6111]; Plaza Gallardo, B. [0000-0003-3615-0353]; Poyatos Martínez, D. [0000-0002-3829-5110]This letter addresses on the design of a planetary protection shell for performing the Electro-Magnetic Compatibility (EMC) tests of the Anisotropic Magneto-Resistance (AMR) sensor of the ExoMars mission. This mission has strict bio-burden requirements. The ElectroMagnetic (EM) properties of several materials have been investigated for measuring their transmission coefficients and the novelty of this letter is the use of Fused Deposition Modeling (FDM) technology as the production method. Additive manufacturing is presented as a promising technology in the field of radiofrequency since it can use a wide range of materials (including thermoplastics) with high and low transmission coefficient. The investigation comprises the analysis of the electromagnetic properties of several 3D printer materials in order to study their transmission coefficients. Seeing the EM characterization results, it was decided to produce a shell using FDM technology because it provides control over the grounding of the instrument and makes easier the integration, cleaning and protection against impacts during the operation, with great versatility and low cost. To finish, the shell has been proved during the acceptance EMC tests of the flight model and flight spare AMR instrument.Publicación Restringido Limitations in the Shielding Effectiveness Measurement Methods for Carbon Fiber Composites(Institute of Electrical and Electronics Engineers, 2021-04-12) Plaza Gallardo, Borja; Fernández Romero, S.; Gómez de Francisco, Patricia; Muñoz Rebate, I.; Ramos Somolinos, D.; Poyatos Martinez, David; Agencia Estatal de Investigación (AEI)Novel materials, as multi-ply carbon fiber composites (CFC), are increasingly used in the industry due to their outstanding mechanical properties in relation to their weight. In this regard, from the standpoint of electromagnetic compatibility (EMC), shielding effectiveness (SE) is a key parameter that often determines the scope for application of a given material. This article addresses the application of two complementary standards, ASTM D4935 and IEC 61000-4-21, to the SE measurement of different CFC test samples with more than 10 layers and a very large expected shielding. The analysis of the limitations encountered and the description of applied improvements on the traditional measurement procedures on each method are also included, showing promising results. On the other hand, there are alternative methods to evaluate the SE of CFC based on their DC square resistance. Consequently, and forthe shake of completeness, a novel setup for high precision measurement of the DC square resistance of CFC samples is also described along the article.Publicación 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.Publicación Restringido Performance analysis of the Particle Swarm Optimization algorithm when applied to direction of arrival estimation(Institute of Electrical and Electronics Engineers, 2009-09-18) Errasti Alcalá, B.; Escot Bocanegra, D.; Poyatos Martinez, David; Montiel, I.; Instituto Nacional de Técnica Aeroespacial (INTA)Direction of arrival (DOA) estimation is a well known problem involved in different applications. The latest of these applications have greater constraints which make necessary new efforts in estimating the DOA with fewer snapshots. In that sense, this paper presents an iterative method based on particle swarm optimization that solves the problem with a single snapshot. The performance of this algorithm is analyzed and shown with numerical results under different scenarios. Conclusions are also provided.Publicación Acceso Abierto Soft Computing Techniques for Free-Space Measurements of Complex Dielectric Constant(River Publishers Journals, 2009-06-05) Escot Bocanegra, D.; Poyatos Martinez, David; Patricio, M. A.; Instituto Nacional de Técnica Aeroespacial (INTA)A novel method for estimating the dielectric properties of materials by applying different soft computing techniques is presented. Dielectric properties allow us to know other material characteristics such as moisture content, bio-content, chemical concentration, etc., which are of great importance on industrial or science fields. In this paper, we present a free-space measurement method along with soft computing techniques, such as Genetic Algorithms (GA) and Particle Swarm Optimization (PSO), and other approaches like Artificial Neural Networks (ANN), for estimating the dielectric properties of materials. The proposed method is validated by measurements and synthetic materials, which were generated to test the performance of these soft computing algorithms.Publicación Restringido Application of a Spherical Multi-Purpose Facility to the Selection of the Appropriate Radome for an On-Board POD Antenna(Taylor and Francis Online, 2012-04-03) Poyatos Martinez, David; Escot Bocanegra, D.; De Diego Custodio, E.; González Diego, I.; Sáez de Adana, F. M.; Montiel, I.; Instituto Nacional de Técnica Aeroespacial (INTA)This paper presents the application of a new multi-purpose facility for electromagnetic tests to the measurement of the influence of radomes on the radiation of an antenna. The antenna under test is part of a project for mounting a small, low-cost, low-power electronic system in the pod of an unmanned aerial vehicle. The shape of the radome is restricted to the pod physical specifications, but several materials could be tested to assess its effect on the antenna, and to select the best fitted for this particular application.Publicación Restringido Modeling and Measuring the Shielding Effectiveness of Carbon Fiber Composites(Institute of Electrical and Electronics Engineers, 2019-10-25) Díaz Angulo, L. M.; Gómez de Francisco, Patricia; Plaza Gallardo, Borja; Poyatos Martinez, David; Ruiz Cabello Núñez, M. D.; Escot Bocanegra, D.; García, Salvador G.; Ministerio de Economía y Competitividad (MINECO); Agencia Estatal de Investigación (AEI)We provide a model able to predict the shielding effectiveness (SE) of carbon fiber composite (CFC) panels made of stacked layers of conducting fibers. This model permits us to obtain simple formulas in which the only parameters needed are the sheet square resistance and the effective panel thickness. These tools let us predict a minimum SE, which always increases with the frequency and therefore constituting the worst case, from an electromagnetic shielding perspective. Consequently, the measurement of minimum SE requirements can be simply measured with a micro-ohmmeter using an specific experimental setup which is also described here. Additionally, this method allows to measure very high SE falling far beyond the dynamic range of the values measurable with the most commonly used standard, the ASTM D4935. After describing the modeling technique and the different test setups used, across-validation between theoretical and experimental results is made for four different samples of CFC; two designed to test the modeling assumptions and two which are representative of the ones nowadays used in a real aircraft.Publicación Acceso Abierto The athena x-ray integral field unit: a consolidated design for the system requirement review of the preliminary definition phase(Springer Link, 2022-08-30) Barret, Didier; Albouys, Vincent; Den Herder, Jan-Willem; Piro, Luigi; Cappi, Massimo; Huovelin, Juhani; Kelley, Richard; Mas-Hesse, J. Miguel; Paltani, Stéphane; Rauw, Gregor; Rozanska, Agata; Acero, Fabio; Vera Trallero, Isabel; Grosso, Nicolas; Varnière, Peggy; Genolet, Ludovic; Charles, Ivan; Miniutti, Giovanni; Ullom, Joel; Sato, Kosuke; Bulgarelli, Andrea; Laurent, Philippe; Adami, Christophe; Rigano, Manuela; Langer, Mathieu; Granat, Dolorès; Pinsard, Frederic; Schaye, Joop; Walmsley, Gavin; Woźniak, Grzegorz; Aicardi, Corinne; Perry, James; Dupourqué, Simon; Ledot, Aurélien; Fioretti, Valentina; Surace, Christian; Nicastro, Fabrizio; Sciortino, Salvatore; Jiménez, María; Jolly, Antoine; Bounab, Ayoub; Maussang, Irwin; Smith, Stephen; Clerc, Laurent; Lo Cicero, Ugo; Kiviranta, Mikko; Cavazzuti, Elisabetta; Roelfsema, Peter; Roig, Anton; Medinaceli Villegas, Eduardo; Lesrel, Jean; Boyce, Kevin; Dupieux, Michel; Durkin, Malcom; Argan, Andrea; Pascale, Ramon; Eckert, Dominique; Soucek, Jan; Kammoun, Elias; Bonny, Patrick; Yamaguchi, Hiroya; Auricchio, Natalia; Beaumont, Sophie; Ettori, Stefano; Cucchetti, Edoardo; Pointecouteau, Etienne; Akamatsu, Hiroki; Vidriales, María; Lotti, Simone; Calarco, Simona; Zuchniak, Monika; Merino Alonso, Pablo Eleazar; Kreykenbohm, Ingo; Wakeham, Nicholas; Soto Aguilar, Javier; Vink, Jacco; De Wit, Martin; Silva, Vitor; Kaastra, Jelle; Den Hartog, Roland; Taralli, Emanuele; Clerc, Nicolas; Coleiro, Alexis; Van Leeuwen, Bert-Joost; Guignard, Nicolas; Torrioli, Guido; Ubertini, Pietro; Bernard, Vivian; Miller, Jon; Eiriz, Valvanera; Boreux, Charles; Poyatos Martinez, David; Pratt, Gabriel W.; Molin, Alexeï; Minervini, Gabriele; Le Mer, Isabelle; De Vries, Cor; Yamasaki, Noriko; Goldwurm, Andrea; Coynel, Alexandre; Van Loon, Dennis; Dadina, Mauro; Prouvé, Thomas; Brachet, Frank; Porter, Frederick; Spizzi, Pierre; Jourdan, Thierry; Massonet, Didier; Lyautey, Bertrand; Sciortino, Luisa; Pinto, Ciro; Vibert, Laurent; Simionescu, Aurora; Boutelier, Martin; Roncarelli, Mauro; Julien, Sabine; González, Raoul; Maffei, Bruno; Todaro, Michela; Balado, A.; Ferrando, Philippe; Atienza, R.; Schwander, Denis; Millerioux, Jean-Pierre; Godet, Olivier; Sanisidro, Julien; Bancel, Florian; Vaccaro, Davide; Webb, Natalie; Camus, Thierry; Coriat, Mickael; Carron, Jérôme; Piconcelli, Enrico; Puccetti, Simonetta; Mitsuda, Kazuhisa; Mineo, Teresa; Jaubert, Jean; D'Ai, Antonino; Adam, Thomas; Frericks, Martin; Costantini, Elisa; Janiuk, Agnieszka; Cobo, Beatriz; Ghizzardi, Simona; Gatti, Flavio; Molendi, Silvano; Wise, Michael; Bandler, Simon; Torrejón, José Miguel; Kedziora, Bartosz; Dauser, Thomas; Prêle, Damien; Duband, Lionel; Terrier, Régis; Pajot, François; Daniel, Christophe; Ferrari Barusso, Lorenzo; Mot, Baptiste; Vodopivec, Boris Martin; Giovannini, Elisa; DeNigris, Natalie; Encinas Plaza, José Miguel; Van der Kuur, Jan; González, Manuel; Amato, Roberta; Geoffray, Hervé; Dercksen, Johannes; Pradines, Alice; Rollet, Bertrand; Dubbeldam, Luc; Terrasa, Guilhem; Alcacera Gil, María Ángeles; Maisonnave, Océane; DiPirro, Michael; Monestes, David; Laurenza, Monica; Boorman, Peter; Bozzo, Enrico; Capobianco, Vito; Parot, Yann; D'Andrea, Matteo; Korb, Andrew; Nagayoshi, Kenichiro; Roudil, Gilles; Doumayrou, Eric; Gao, Jian-Rong; Luminari, Alfredo; Khosropanah, Pourya; Gloaguen, Emilie; Branduardi Raymont, Graziella; Peille, Philippe; Gabici, Stefano; Eckart, Megan; Franssen, Philippe; Shinozaki, Keisuke; Gonzalo Melchor, Alejandro; Ptak, Andy; Chervenak, James; Michalski, Lea; Castellani, Florent; Cuttaia, Francesco; Thibert, Tanguy; Hieltjes, Paul; Hurtado, Adolfo Jesus; Fossecave, Hervé; Irwin, Kent; Adams, Joseph; Attard, Anthony; Etcheverry, Christophe; Rioland, Guillaume; Natalucci, Lorenzo; Finoguenov, Alexis; Jacquey, Christian; Barbera, Marco; Barcons, Xavier; Varisco , Salvatore; Mendez, Mariano; Ercolani, Eric; Fernández Sánchez, Miguel; Gastaldello, Fabio; Uslenghi, Michela; Angelinelli, Matteo; Jacques, Lionel; Villa, Fabrizio; Lorenz, Maximilian; Mesnager, Jean-Michel; Durand, Jean Louis; Sakai, Kazuhiro; Decourchelle, Anne; Martin, Sylvain; Berrocal, A.; Finkbeiner, Fred; Wilms, Joern; Reina, M.; Rudnicki, Tomasz; Doriese, William; Nazé, Yaël; Abdoelkariem, Shariefa; D'anca, Fabio; Gant, Florent; Van der Hulst, Paul; Mazzotta, Pasquale; Coeur-Joly, Odile; Añón Cancela, M.; Canourgues, Florent; Fiore, Fabrizio; Raulin, Desi; Noguès, Loïc; Hoogeveen, Ruud; Ravera, Laurent; Callanan, Paul; Cheatom, Oscar; André, Jérôme; Sordet, Michael; Brienza, Daniele; Duval, Jean-Marc; Corcione, Leonardo; Fiocchi, Maria Teresa; Pailot, Damien; Panessa, Francesca; Fioretti, Valentina; Van Weers, Henk; Anvar, Shebli; Parodi, Luigi; Petit, Pascal; De Plaa, Jelle; Kirsch, Christian; Macculi, Claudio; Volpe, Angela; Puccio, Elena; Gómez Elvira, J.; Bonnet, François; Marelli, Lorenzo; Murat, David; Audard, Marc; Jackson, Brian; Colonges, Stéphane; Korpela, Seppo; Webb, Natalie; Laudet, Philippe; Chiarello, Fabio; Ligori, Sebastiano; Montinaro, Nicola; Svoboda, Jiri; Bij de Vaate, Jan Geralt; Blin, Sylvie; Jonker, Peter; Bruijn, Marcel; Ceballos, Maria Teresa; Cardiel, Nicolás; Kilbourne, Caroline; Chaoul, Laurence; Gottardi, Luciano; Gros, Michel; Bonino, Donata; Skup, Konrad; Rodriguez, Louis; Fiorini, Mauro; Ardellier, Florence; Bellouard, Elise; Agencia Estatal de Investigación (AEI); Ministerio de Ciencia e Innovación (MICINN); Centre National D'Etudes Spatiales (CNES); Agenzia Spaziale Italiana (ASI); European Space Agency (ESA)The Athena X-ray Integral Unit (X-IFU) is the high resolution X-ray spectrometer, studied since 2015 for flying in the mid-30s on the Athena space X-ray Observatory, a versatile observatory designed to address the Hot and Energetic Universe science theme, selected in November 2013 by the Survey Science Committee. Based on a large format array of Transition Edge Sensors (TES), it aims to provide spatially resolved X-ray spectroscopy, with a spectral resolution of 2.5 eV (up to 7 keV) over an hexagonal field of view of 5 arc minutes (equivalent diameter). The X-IFU entered its System Requirement Review (SRR) in June 2022, at about the same time when ESA called for an overall X-IFU redesign (including the X-IFU cryostat and the cooling chain), due to an unanticipated cost overrun of Athena. In this paper, after illustrating the breakthrough capabilities of the X-IFU, we describe the instrument as presented at its SRR, browsing through all the subsystems and associated requirements. We then show the instrument budgets, with a particular emphasis on the anticipated budgets of some of its key performance parameters. Finally we briefly discuss on the ongoing key technology demonstration activities, the calibration and the activities foreseen in the X-IFU Instrument Science Center, and touch on communication and outreach activities, the consortium organisation, and finally on the life cycle assessment of X-IFU aiming at minimising the environmental footprint, associated with the development of the instrument. Thanks to the studies conducted so far on X-IFU, it is expected that along the design-to-cost exercise requested by ESA, the X-IFU will maintain flagship capabilities in spatially resolved high resolution X-ray spectroscopy, enabling most of the original X-IFU related scientific objectives of the Athena mission to be retained.
