Person:
López Orozco, José Antonio

First Name

José Antonio

Last Name

López Orozco

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Ciencias Físicas

Department

Arquitectura de Computadores y Automática

Area

Ingeniería de Sistemas y Automática

Identifiers

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Now showing 1 - 10 of 35

Multisensor fusion for linear control systems with asynchronous, Out-Of-Sequence and erroneous data
(Pergamon-Elsevier Science LTD, 2012-03) Besada Portas, Eva; López Orozco, José Antonio; Besada, Juan; Cruz García, Jesús Manuel de la
This paper presents a state of the art of the estimation algorithms dealing with Out-of-Sequence (OOS) measurements for non-linearly modeled systems. The state of the art includes a critical analysis of the algorithm properties that takes into account the applicability of these techniques to autonomous mobile robot navigation based on the fusion of the measurements provided, delayed and OOS, by multiple sensors. Besides, it shows a representative example of the use of one of the most computationally efficient approaches in the localization module of the control software of a real robot (which has non-linear dynamics, and linear and non-linear sensors) and compares its performance against other approaches. The simulated results obtained with the selected OOS algorithm shows the computational requirements that each sensor of the robot imposes to it. The real experiments show how the inclusion of the selected OOS algorithm in the control software lets the robot successfully navigate in spite of receiving many OOS measurements. Finally, the comparison highlights that not only is the selected OOS algorithm among the best performing ones of the comparison, but it also has the lowest computational and memory cost.
MEGARA, the R=6000-20000 IFU and MOS of GTC
(SPIE-Int Soc Optical Engineering, 2018) Gil de Paz, Armando; Gallego Maestro, Jesús; Bouquin, A.; Carbajo, J.; Cardiel López, Nicolás; Castillo Morales, África; Esteban San Román, Segundo; López Orozco, José Antonio; Pascual, S.; Picazo, P.; Sánchez Penim, Ainhoa; Velázquez, M.; Zamorano Calvo, Jaime; Catalán Torrecilla, Cristina; Dullo, Bililign; Pérez González, P.G.; Roca Fábrega, Santi
MEGARA is the new generation IFU and MOS optical spectrograph built for the 10.4m Gran Telescopio CANARIAS (GTC). The project was developed by a consortium led by UCM (Spain) that also includes INAOE (Mexico), IAA-CSIC (Spain) and UPM (Spain). The instrument arrived to GTC on March 28th 2017 and was successfully integrated and commissioned at the telescope from May to August 2017. During the on-sky commissioning we demonstrated that MEGARA is a powerful and robust instrument that provides on-sky intermediate-to-high spectral resolutions R_(FWHM) ~ 6,000, 12,000 and 20,000 at an unprecedented efficiency for these resolving powers in both its IFU and MOS modes. The IFU covers 12.5 x 11.3 arcsec2 while the MOS mode allows observing up to 92 objects in a region of 3.5 x 3.5 arcmin^(2) . In this paper we describe the instrument main subsystems, including the Folded-Cassegrain unit, the fiber link, the spectrograph, the cryostat, the detector and the control subsystems, and its performance numbers obtained during commissioning where the fulfillment of the instrument requirements is demonstrated.
Minimum time search in uncertain dynamic domains with complex sensorial platforms
(MDPI AG, 2014-08-04) Lanillos Pradas, Pablo; Besada Portas, Eva; López Orozco, José Antonio; Cruz García, Jesús Manuel de la
The minimum time search in uncertain domains is a searching task, which appears in real world problems such as natural disasters and sea rescue operations, where a target has to be found, as soon as possible, by a set of sensor-equipped searchers. The automation of this task, where the time to detect the target is critical, can be achieved by new probabilistic techniques that directly minimize the Expected Time (ET) to detect a dynamic target using the observation probability models and actual observations collected by the sensors on board the searchers. The selected technique, described in algorithmic form in this paper for completeness, has only been previously partially tested with an ideal binary detection model, in spite of being designed to deal with complex non-linear/non-differential sensorial models. This paper covers the gap, testing its performance and applicability over different searching tasks with searchers equipped with different complex sensors. The sensorial models under test vary from stepped detection probabilities to continuous/discontinuous differentiable/non-differentiable detection probabilities dependent on distance, orientation, and structured maps. The analysis of the simulated results of several static and dynamic scenarios performed in this paper validates the applicability of the technique with different types of sensor models.
Courseware management tool for engineering education
(Int Inst Informatics & Systemics, 2002) López Orozco, José Antonio; Risco Martín, José Luis; Andrés Toro, Bonifacio de; Cruz García, Jesús Manuel de la
An courseware management tool has been designed and constructed in order to use as support in the education. The objective of this tool has been to build a template web to offer any subject. A simple database generation allows show the most important theoretical concepts, development exercises and practices, and the resolution of theoretical and practical tests. It includes exercises of checking and reinforcement, and guided practices. Theoretical, practical and problem tests allow the teacher to realize a follow-up of the student. The tool is reinforced with statistical study of these tests, discussion forums and direct communication between student and teacher for resolution of doubts so the pupil acquires the necessary foundations to deal subjects of higher courses. The courseware management tool has been applied for subjects of Control Systems in the new plans of study of the Universidad Complutense de Madrid (Electronic Engineering and Physical Sciences studies).
Localization of non-linearly modeled autonomous mobile robots using out-of-sequence measurements
(MDPI AG, 2012-03) Besada Portas, Eva; López Orozco, José Antonio; Lanillos Pradas, Pablo; Cruz García, Jesús Manuel de la
This paper presents a state of the art of the estimation algorithms dealing with Out-of-Sequence (OOS) measurements for non-linearly modeled systems. The state of the art includes a critical analysis of the algorithm properties that takes into account the applicability of these techniques to autonomous mobile robot navigation based on the fusion of the measurements provided, delayed and OOS, by multiple sensors. Besides, it shows a representative example of the use of one of the most computationally efficient approaches in the localization module of the control software of a real robot (which has non-linear dynamics, and linear and non-linear sensors) and compares its performance against other approaches. The simulated results obtained with the selected OOS algorithm shows the computational requirements that each sensor of the robot imposes to it. The real experiments show how the inclusion of the selected OOS algorithm in the control software lets the robot successfully navigate in spite of receiving many OOS measurements. Finally, the comparison highlights that not only is the selected OOS algorithm among the best performing ones of the comparison, but it also has the lowest computational and memory cost.
Tic-tac, colecciona UCM. Tecnología de la información y las comunicaciones aplicada a las técnicas de aprendizaje cooperativo
(2017) Aguilar Ochoa, Andrés Felipe; Amores Martínez, Carlos Salvador; Besades Porta, Eva; Cabezas Cárdenas, Víctor Alfonso; Fernández Sánchez, Paloma; Garrido Díaz, Esther; Hidalgo Alcalde, Pedro; López Orozco, José Antonio; Pellejero Cuevas, Noelia; Solís Fernández, Fernando
MEGARA, the new intermediate-resolution optical IFU and MOS for GTC: getting ready for the telescope
(SPIE-Int Soc Optical Engineering, 2016) Gil de Paz, Armando; Gallego Maestro, Jesús; Cardiel López, Nicolás; Castillo Morales, África; Cruz García, Jesús Manuel de la; Esteban San Román, Segundo; López Orozco, José Antonio; Pascual, S.; Picazo, P.; Sánchez-Penim, A.; Zamorano Calvo, Jaime; Pérez González, Pablo Guillermo; otros, ...
MEGARA (Multi-Espectrografo en GTC de Alta Resolucion para Astronomia) is an optical Integral-Field Unit (IFU) and Multi-Object Spectrograph (MOS) designed for the GTC 10.4m telescope in La Palma that is being built by a Consortium led by UCM (Spain) that also includes INAOE (Mexico), IAA-CSIC (Spain), and UPM (Spain). The instrument is currently finishing AIV and will be sent to GTC on November 2016 for its on-sky commissioning on April 2017. The MEGARA IFU fiber bundle (LCB) covers 12.5x11.3 arcsec(2) with a spaxel size of 0.62 arcsec while the MEGARA MOS mode allows observing up to 92 objects in a region of 3.5x3.5 arcmin(2) around the IFU. The IFU and MOS modes of MEGARA will provide identical intermediate-to-high spectral resolutions (R-FWHM similar to 6,000, 12,000 and 18,700, respectively for the low-, mid-and high-resolution Volume Phase Holographic gratings) in the range 3700-9800 angstrom angstrom. An x-y mechanism placed at the pseudo-slit position allows (1) exchanging between the two observing modes and (2) focusing the spectrograph for each VPH setup. The spectrograph is a collimator-camera system that has a total of 11 VPHs simultaneously available (out of the 18 VPHs designed and being built) that are placed in the pupil by means of a wheel and an insertion mechanism. The custom-made cryostat hosts a 4kx4k 15-mu m CCD. The unique characteristics of MEGARA in terms of throughput and versatility and the unsurpassed collecting are of GTC make of this instrument the most efficient tool to date to analyze astrophysical objects at intermediate spectral resolutions. In these proceedings we present a summary of the instrument characteristics and the results from the AIV phase. All subsystems have been successfully integrated and the system-level AIV phase is progressing as expected.
El Glosario E-Derecho: un modelo empírico de información jurídica para la transmisión y comprensión del Derecho de Propiedad Intelectual en los campus virtuales universitarios
(International Institute of Informatics and Cybernetics, 2009) Flores Doña, Mª Sierra; Fernández-Pampillón Cesteros, Ana María; López Orozco, José Antonio; Matesanz del Barrio, María
El Glosario e-derecho surge en la actividad universitaria, por la necesidad urgente de resolver eficazmente los problemas e incertidumbres advertidos en la aplicación del Derecho tradicional común y de la propiedad intelectual a las obras y creaciones intelectuales desarrolladas o difundidas por los profesores, investigadores y estudiantes en entornos electrónicos de formación universitaria (campus virtuales). Este glosario electrónico es un modelo empírico que puede ser utilizado en múltiples ámbitos de la sociedad. En él se recoge y sistematiza el trabajo colaborativo y multidisciplinar de numerosos especialistas. Mediante 345 términos se ofrecen soluciones y alternativas para la regulación coordinada de los campos jurídicos implicados en el marco científico y tecnológico de la sociedad de la información y del conocimiento. Este artículo describe los resultados de una investigación científico-tecnológica sobre la que se ha construido un modelo empírico de organización y de difusión en la red de un conocimiento jurídico ya creado, de difícil acceso, complejo y disperso. El modelo propuesto permite acceder a dicho conocimiento a los usuarios de los nuevos ciberespacios académicos, especialmente a los usuarios de los campus virtuales universitarios.
Una herramienta para gestión de cuestionarios
(Editorial Complutense, 2005) López Orozco, José Antonio; Risco Martín, José Luis; Fernández-Valmayor Crespo, Alfredo; Fernández-Pampillón Cesteros, Ana María; Merino Granizo, Jorge
Se está desarrollando una herramienta de autor para la creación y gestión de cuestionarios de forma sencilla y fácil. El profesor con esta herramienta sólo tendrá que escribir las preguntas y respuestas de modo semejante a como lo hace en el procesador de textos MS-Word. Así se facilita el uso de formularios a aquellos profesores menos familiarizados con las nuevas tecnologías. Pero para cualquier usuario será un elemento muy útil, puesto que permite la creación de cuestionarios en formato WYSIWYG1 y dispondrá de los cuestionarios en un formato claro y cómodo de leer, corregir y mantener. La herramienta, a su vez, es independiente de la plataforma docente que se utilice para su visualización final. Generará código cualquier plataforma en la que se pueda importar las preguntas en un formato conocido como es texto, html, base de datos, etc. Como ejemplo se generará código para WebCT, pero se podrán construir librerías que permitan la generación de código en otras plataformas sin prejuicio de todo lo diseñado para formatos anteriores ni del funcionamiento de la herramienta construida.
Efficient deployment of remote laboratories with TwinCAT-PLCs and EjsS Plugins
(Elsevier, 2022-10-06) Chacón Sombría, Jesús; Besada Portas, Eva; García Pérez, Lía; López Orozco, José Antonio
This paper describes a new approach to streamline the development of Remote Laboratories (RL) for Control Education based on TwinCAT Programmable Logic Controllers (PLCs) and Easy JavaScript Simulations (EJsS). On one hand, the TwinCAT PLC is used to implement the laboratory back-end (responsible of closing the feedback loop over the plant under study) with industrial real-time automation methodologies. On the other hand, EJsS is used: 1) to define the RL Human-Machine Interface (HMI) front-end (used by the students to parametrize & observe the evolution of the PLC behavior and signals) and 2) to smooth and centralize the majority of the tasks that the instructors have to perform to configure and deploy the RL. This second utility of EJsS, a novelty of the RL presented in this paper, is supported by an EJsS Plugin that has been especially designed with that purpose. Besides, it is worth noting that our new RL is supported by an improved version of ReNoLabs, developed in 2016 to be a lightweight middle-ware of RLs with EJsS HMI webpages and different types of backends, whose Node.js-based server has been updated to backup the functionality of the EJsS Plugin. This paper also shows how to use our approach to setup a RL and describes the main characteristics of two RLs that have been updated with it.