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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Publicación Acceso Abierto INMARS: SURFACE-ORBITAL TELECOMMUNICATION SYSTEM ON MARS. DESIGN AND TESTING(8th Planetary Sciences and Solar System Exploration Congress, 2025-05-26) Ruiz Carrasco, Jose Raimundo; Serrano Santos, Felipe; Plaza Gallardo, Borja; Poyatos Martinez, David; Arruego, IgnacioThe exploration of Mars has been developed by multiple vehicles (rovers and orbiters) deployed since the dawn of the space race, and lately with the Perseverance mission. The acquisition of data and samples is relevant to study the planet and prepare future manned missions. In this regard, the National Institute for Aerospace Technology (INTA) performs R+D of impact probes; in particular, the InMars mission aims to establish an operational probe network on Mars for the acquisition and transmission of atmospheric data. This will provide better understanding of the planet's atmospheric dynamics and help to reduce risks for future landings on Mars. The required surface-orbital telecommunication system must perform a UHF band network, linking probes with Mars orbiters, and operate under severe environmental, impact, and reduced space conditions, among others. This communication will cover the preliminary design and planned testing of the system and its main components.Publicación Restringido UAVEMI project: Numerical and experimental EM immunity assessment of UAV for HIRF and lightning indirect effects(Institute of Electrical and Electronics Engineers, 2016-07-07) García, Salvador G.; Silva, F.; Escot Bocanegra, D.; Pascual, Enrique; Pantoja, M. F.; Riu, Pere J.; Añón Cancela, M.; Álvarez, J.; Cabello, M.; Pous, M.; Fernández Romero, Sergio; Trallero Vela, R.; Poyatos Martinez, David; Nuño, L.; Instituto Nacional de Técnica Aeroespacial (INTA)The UAVEMI project, funded by the Spanish Ministry of Economy and Competitiveness, gathers a consortium formed by several research and development institutions and one industrial partner. The main goal is to develop innovative experimental and numerical approaches for the assessment of the electromagnetic compatibility of unmanned air vehicles, under high intensity radiated fields, lightning indirect effects and non-nuclear electromagnetic pulses. This contribution describes the capabilities currently being developed under the project.Publicación Restringido Application of particle swarm optimization (PSO) to single-snapshot direction of arrival (DOA) estimation(Institute of Electrical and Electronics Engineers, 2007-12-06) Escot Bocanegra, D.; Poyatos Martinez, David; González, Iván ; Sáez de Adana, F. M.; Cátedra, M. F.; Instituto Nacional de Técnica Aeroespacial (INTA)This paper attempts to examine the feasibility of using an heuristic bio-inspired algorithm in DOA estimation. Specifically, particle swarm optimization (PSO) (Kennedy, et. al., 1995)Publicación Acceso Abierto Characterization of Joints between Carbon Fiber Composite Parts Using a Microstrip Transmission Line Method(Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-06) Plaza Gallardo, Borja; López, Daniel; Poyatos Martinez, David; Agencia Estatal de Investigación (AEI)The electromagnetic performance of aerial platforms, which are composed mostly of nonmetallic materials, is a subject of great interest at present time. The behavior of this type of composite structure against electromagnetic environmental effects (E3), such as lightning, is not well-studied as in the case of metalic structures. The purpose of this article is to characterize the joints present in aerial platforms constructed mainly of nonmetallic composite materials. The study of these joints is fundamental because electrical discontinuities or preferential routes can produce changes in the electromagnetic behavior of an aircraft. The proposed measurement system for the characterization of these joints is a microstrip line. The flexibility of the test setup allows for evaluation of different joints in carbon fiber composite (CFC) samples with a different number of plies. Additionally, approximated models of the behavior of the joints as well as the detection of possible defects in the joining process are reported.Publicación Restringido Methodology to Achieve Accurate Non Cooperative Target Identification Using High Resolution Radar and a Synthetic Database(Springer Link, 2010-07-02) Jurado Lucena, A.; Errasti Alcalá, B.; Escot Bocanegra, D.; Fernández Recio, R.; Poyatos Martinez, David; Montiel, I.; Instituto Nacional de Técnica Aeroespacial (INTA)In the last few years, there is a great interest in developing an identification system capable to make a reliable classification of aircrafts into different groups (friendly, hostile or neutral). Depending on the context in which these systems are deployed, incorrect identification may lead to serious problems, such as fratricide or engagement of civilian aircrafts. Different techniques have been researched to face this problem, but non-cooperative ones have awakened more interest because they do not require aircraft collaboration. Non Cooperative Target Identification (NCTI) using radar is a complex task, mainly due to the fact that a database of possible targets is needed. To populate this database, Radar Cross Section (RCS) predictions produced by computer simulation seem to be the most feasible way to perform this task, since measurements alone cannot cover the vast range of targets, configurations and required aspect angles. These predictions are typically performed in the frequency domain and a specific processing must be done to obtain both High Resolution Range Profiles (HRRPs) and 2D Inverse Synthetic Aperture Radar (2D-ISAR) images. This paper shows a methodology to face the NCTI task, which use both synthetic HRRPs and 2D-ISAR to achieve an accurate identification.Publicación Restringido Design of a planetary protection cover for EMC testing of a spacial magnetic sensor(Institute of Electrical and Electronics Engineers, 2019-10-17) Fernández Romero, S.; Parrondo, María Concepción; Díaz Michelena, Marina; Muñóz Rebate, I.; León Calero, Marina; Martín Iglesias, Santiago; Plaza Gallardo, Borja; Escot Bocanegra, D.; Poyatos Martinez, David; Jiménez Lorenzo, María; López Sanz, Daniel; Ministerio de Economía y Competitividad (MINECO); Agencia Estatal de Investigación (AEI)This paper explains the research process carried out for the development and manufacture of the planetary protection cover for carrying out the electromagnetic compatibility (EMC) tests of the an-isotropic magneto-resistance (AMR) sensor of the ExoMars 2020 mission. This mission has strict bioburden requirements. The electromagnetic properties of several materials have been analyzed in order to study their transmission coefficient and the innovation of this project is the use of fused deposition modeling (FDM) technology as manufacturing method. Additive manufacturing is presented as a promising technology in the field of radiofrequency since it can use a wide range of polymeric materials (thermoplastics) with low transmission coefficient. Observing the electromagnetic (EM) characterization results, it was decided to manufacture a protective cover using FDM technology, because it allows control over the grounding of the instrument and facilitates the integration, cleaning and protection against impacts during the manipulation, with great versatility and low cost. Finally, the cover has been verified during the acceptance EMC tests of the flight model AMR instrument.Publicación Acceso Abierto Caracterización Electromagnética de Reflectores de Esquina para la Calibración de Tecnología SAR(URSI, 2025-09) Ramos Somolinos, David; Moragrega Langton, María; Sánchez Sánchez, Gema; Auñón Marugán, Alicia; Gimeno Martinez, Nuria; Casal Vázquez, Nuria; Cifuentes Revenga, Patricia; Cuerda Muñoz, Juan Manuel; Plaza Gallardo, Borja; Poyatos Martinez, DavidLa tecnología de radar de apertura sintética (SAR) se encuentra presente en una amplia variedad de misiones de observación de la Tierra. Un ejemplo de ello es el satélite PAZ, encargado de la recopilación de información destinada a defensa, a cartografía de alta resolución o a la gestión de desastres naturales, entre otras. Para garantizar la precisión y fidelidad de los datos, el sistema debe estar calibrado adecuadamente. Si bien existen varios medios para realizar esta calibración, habitualmente se utilizan elementos pasivos como los reflectores de esquina. En este trabajo se estudian distintos diseños y materiales para estos reflectores de esquina con el objetivo de eliminar fuentes de error en la calibración y reducir el alto peso de estos sistemas. En concreto, se estudiará un modelo fabricado en acero que servirá de referencia, un prototipo de aluminio con una nueva geometría y un modelo de ácido poliláctico (PLA) cuya superficie está recubierta con pintura conductora de níquel. Para ello se utiliza el software de simulación electromagnética Ansys Electronics HFSS y la cámara anecoica biestática ( BIANCHA ) perteneciente al nstituto Nacional de écnica eroespacial (INTA). Además, se presentarán los nuevos diseños fabricados en material compuesto en los que se está trabajando actualmente.Publicación 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, Jesús; 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.Publicación Restringido RCS Analysis of a Configurable Mock-Up Cavity With Blade Motion Capability(Institute of Electrical and Electronics Engineers, 2009-02-24) Poyatos Martinez, David; Escot Bocanegra, D.; Fernández Recio, R.; Montiel Sánchez, I.; Instituto Nacional de Técnica Aeroespacial (INTA)The scattering behavior and simulation of cavities are still being studied by several research groups. In this paper, a simplified jet-engine model has been manufactured and measured under different configurations, such as straight or curved blades, different fixed blades position, and free motion capability at adjustable speed. These measurements can be used to analyze the response of cavities as well as radar cross-section reference data for validating existing and future prediction codes.Publicación Acceso Abierto Comparing Open Area Test Site and Resonant Chamber for Unmanned Aerial Vehicle's High-Intensity Radiated Field Testing(Institute of Electrical and Electronics Engineers, 2018-01-18) Fernández Romero, S.; López Rodríguez, P.; Escot Bocanegra, D.; Poyatos Martinez, David; Añón Cancela, M.; Ministerio de Economía y Competitividad (MINECO); Agencia Estatal de Investigación (AEI)Open area test sites (OATS) have been traditionally employed for aircraft electromagnetic compatibility certification tests because of the large size of these items. In this regard, unmanned aerial vehicles (UAVs) have emerged in the last years and, albeit being sometimes notably smaller, yet they have to accomplish for the same certification process. This paper investigates into the possibility of using a reverberation chamber for performing two aircraft low-level coupling tests, namely, low-level direct drive and low-level swept fields, and compares the results with those obtained in an OATS, in both cases using a representative part of a UAV.
