Entity

Time filter

Source Type

Madrid, Spain

De Bedoya C.D.L.C.,ISDEFE | Cabeceira M.L.,GMV Sistemas
25th International Technical Meeting of the Satellite Division of the Institute of Navigation 2012, ION GNSS 2012 | Year: 2012

The objective of the project ARIADNA is the design and development of a new concept based on volumetric navigation underpinned by the accuracy of GNSS technologies. The innovative ARIADNA solution encompasses a new series of maritime navigation support systems in order to allow optimization of the infrastructures, the navigation during dense traffic in ports, rivers, channels, lock and their access areas; developing a system which leads to efficient and environmentally-friendly maritime and inland operations. The ARIADNA technology is based on the Volumetric Navigation System (VNS) concept. VNS combines navigation, volume and time information of the craft involved in a specific scenario in order to know the surrounding space occupation or availability to define their relative movements, defining a safety volume around the craft. The knowledge of the safety volume associated to every craft increases traffic efficiency and safety in navigation. In the maritime navigation, the "volume" of a ship has been defined as the envelope of the ship after a certain time, taking into account his current speed. The volume takes also into account the extreme maneuvering positions at the given speed with the appropriated corrections for drift due to wind and ocean currents. The Volumetric Navigation concept is integrated into the development of a collaborative navigation tool sharing position, attitude, and volume. The position is accurately provided by GNSS technologies (GPS, EGNOS, etc). Specific GNSS performances in terms of accuracy and integrity are crucial to accomplish a safety navigation tool. So far the use and processing of GPS, EGNOS signals and messages provide the required position and navigation performances, parameters required by ARIADNA solution. In order to develop a collaborative frame and system, it is required to integrate GNSS position and velocity information heading with information provided by AIS (Automatic Identification System) and ECDIS (Electronic Chart Display and Information System). Both technologies are the core technical elements for the ARIADNA system in terms of positioning. Near commercial future activities are related with the system implementation providing warning and maneuvering support for collision avoidance and grounding whilst facilitates risk and warning assessment to vessel and navigation control systems in the infrastructures such as channels, port access areas, narrow inland waterways and congested access areas. ARIADNA future developments are considering different technical and human factors, assessing its integration with maritime existing systems and current maritime regulations, bringing in a valuable tool to avoid human error in navigation, support personal training and enhance best human practices. The paper will present the ARIADNA system architecture focusing mainly on the Volumetric Safety envelope and provide the benefits regarding safety and efficiency improvement in maritime and inland navigation. Source


Agudo D.,ISDEFE | Sanchez A.,Rey Juan Carlos University | Velez J.F.,Rey Juan Carlos University | Belen Moreno A.,Rey Juan Carlos University
International Conference on Systems, Signals, and Image Processing | Year: 2016

This paper describes an implemented solution to automatically detect and recognize in real-time both speed limit warning signs and speed limit signs in railway travel videos recorded from the driver's cab. The lack of available high-quality videos to train this kind of systems and the involved complexity of the rail scenes, with non-controlled illumination conditions, make it challenging the considered problem. Our framework achieved interesting recognition results of around 95% for both signs types and digits recognition. © 2016 IEEE. Source


Sanchez M.M.,ISDEFE
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit | Year: 2011

This article presents a research that was aimed at developing a better understanding of current threats and how to conduct risk assessments in public transport networks by following generic guidelines that can be adapted according to each organization's needs. The aim is to facilitate the task of identifying threats and conduct a vulnerability analysis to help decision makers to prioritize resources in a systematic manner and consequently increase resilience. This article also highlights the main benefits and constraints of performing risk assessments and how the results of risk assessments can be used as a solid foundation for a structured, analytically clear, and systematic approach to security planning for a public transport network. In addition to the summary of the above research, a questionnaire was distributed among three main operators in Europe to gain more insight about the current state of the art in risk assessments in public transport systems. Key aspects of the research can be found presented as Guidelines for Users in the accompanying papers by Barr and Luyten. © Authors 2011. Source


Gonzalez-Guerrero M.,ISDEFE | Jimenez J.J.,CSIC - National Institute of Aerospace Technology | Hernando C.,CSIC - National Institute of Aerospace Technology | Alvarez M.,CSIC - National Institute of Aerospace Technology | Guerrero H.,CSIC - National Institute of Aerospace Technology
IEEE Transactions on Nuclear Science | Year: 2013

A dosimeter for space applications is presented. It is based on the ionization damage affecting the TMP36 sensors when they are exposed to external radiation, which produces an increase of their output voltages. This work explains the configuration, sensing mechanism and working modes of this device and reports the results obtained in a gamma radiation test carried out in March 2012. The test results allow us to select the mode of operation that provides the highest response to the TID, as well as the most sensitive devices. The highest sensitivity is above 100 μV\rad. This dosimeter is part of The Two Towers radiation monitor that will fly on board of the SEOSAT-INGENIO satellite. © 1963-2012 IEEE. Source


Dupeyrat M.,ONERA | Aubry S.,ONERA | Hesselink H.,NLR | Loth S.,DLR | And 4 more authors.
29th Congress of the International Council of the Aeronautical Sciences, ICAS 2014 | Year: 2014

This paper presents an innovative concept for airport operations in the long-term future, based on a radically new airport design encompassing a circular circumventing runway. The Endless Runway project, mostly funded by the European Commission during the Framework Programme 7 (FP7), aims at evaluating the benefits and identifying the constraints associated to this kind of airport. The possibility to operate the airport whatever the wind direction and for every aircraft type, the optimization of air and ground aircraft trajectories through the use of the best runway section, as well as the compact airport footprint are part of the observed gains. Those must be balanced with the high runway construction cost, additional safety issues in gusty winds and the impossibility to extend the runway system if additional capacity is desired. A foreseen application could be a small airport dedicated to unmanned aircraft operations or a large hub airport with limited traffic mix and high reliability of operations. Source

Discover hidden collaborations