Browsing by Author "Sanchez, Javier"

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    Safe road trains for environment: Human factors' aspects in dual mode transport systems
    (2010) Larburu, Maider; Sanchez, Javier; Rodriguez, Domingo José; POWERTRAIN; Tecnalia Research & Innovation; Tecnalia Ventures S.L.
    After being widely applied in aviation, automation is increasingly applied to surface transportation. Furthermore, with the increased reliability and reduced cost of electronics and communications, it is becoming viable to develop a safe and reliable platooning system. These intelligent systems of the future will contribute to improved safety, efficiency, and journey time of vehicles while at the same time reducing stress for passengers. However, although new technologies make vehicle platooning possible, these new technologies will require interaction with drivers. Therefore, the development of appropriate Human - Machine Interfaces (HMI) progressively assumes greater importance, as diverse and innovative technologies are designed and implemented in vehicles. As a result of this interaction there is a need to research human aspects and the HMI. The main objective of this study consists of analyzing human aspects involved in vehicle platooning. Accordingly, this paper describes the human factors issues that come into play when introducing autonomous driving. A further study objective is to develop a high-quality HMI, and assess the effectiveness of the HMI, including the acceptability level from possible end-users point of view. This study is part of the European project "Safe Road Trains for the Environment, SARTRE", that aims to define several platoon requirements attributable to the driver's opinion, as well as to define the necessities to develop an appropriate HMI for a platooning environment. This takes into account information coming from objective parameters, logged during the simulation tests, and the driver preferences derived from acceptability assessment.
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    Safe road trains for the environment (SARTRE): Validation of SARTRE Platoon service and the SARTRE HMI
    (2012) Larburu, Maider; Urquiza, Arkaitz; Sanchez, Javier; POWERTRAIN; ROBOTICA_FLEX; Tecnalia Research & Innovation
    Ever since the electronically coupled vehicles concept was introduced in 1998, besides the increased reliability and reduced cost of electronics and communications, it is now feasible to develop a safe and reliable platooning system, which includes specific Human-Machine Interface (HMI) for platoon vehicles. However, the development of new and sophisticated in-vehicle systems fostered by technical innovation demands careful validation of these systems. Whereas excellent system performance may be sufficient for the technician, it is as important that the equipment is appealing and accepted by the driver. It is unproductive to invest effort in designing and building a driving support system if the system is never switched on, or even disabled. Consequently, the aim of this study is to validate the acceptance of the SARTE platoon service and the developed HMI for a platooning environment within the European project SARTRE [1]. Taking into account potential end-users point of view, was evaluated the following indicators: usefulness, satisfying level, understanding level, ease of use, perceived safety and workload, by means of an Acceptance Scale questionnaire, Technological Acceptance Model questionnaire, etc., in order to collect the self-reported data after platoon driving tests. This was allowed thanks to this study was conducted in a driving simulator, under virtual environment.
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    Wind turbine monitoring for control versions comparison
    (NDT.net, 2016) Campion, Juan Carlos Perez; Ros, Maria Isabel; Sanchez, Javier; Ortega, Juan Antonio; Sanchez, Juan Carlos; Quero, Fernando; FACTORY; SG; Mercado
    The wind is one of the most important sources of energy nowadays. Wind turbine generators (WTGs) have undergone enormous change, with new components and new control strategies being designed to improve their performance. WTG control is the most important component although at the same time it is also the least-known system; it is considered a black box. WTG control strategies are aimed at generating as much power as possible, while keeping the loads in each component below certain limits. If these strategies perform poorly, component life span could be reduced, decreased power production and even WTG collapse. These control strategies are developed by the WTG suppliers who release them as new control versions when a new strategy is implemented or when a failure has been detected in a previous version. In order to understand more about these little-known strategies Iberdrola Renewables has designed a monitoring system for control version comparison. The monitoring system has been designed to collect more information from the WTG, and new sensors have been placed in the blades, drive train and tower in order to compare different control versions. With this new design, Iberdrola Renewables is able to detect any positive or negative impacts on our fleet of these new control versions launched by the suppliers.