Examinando por Autor "Onieva, Enrique"

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Intelligent V2I-Based Traffic Management System
(2011) Simó Reigadas, Francisco Javier; Milanés, Vicente; Villagrá, Jorge; Godoy, Jorge; Pérez, Joshué; Onieva, Enrique
Vehicles equipped with intelligent systems capable of preventing accidents as collision warning system (CWS) or lanekeeping assistance (LKA) are presently in the market. Next step in the reduction of road accidents is based on the coordination of these vehicles in advance for not only avoiding collisions but also improving the traffic flow. To this end, vehicle-to-infrastructure (V2I) communications are mandatory to manage properly traffic situations. This paper presents AUTOPIA approach toward an intelligent traffic management system based on V2I communications. A fuzzy-based control algorithm that take into account a safe and comfortable distance and speed adjustment of each vehicles in order to prevent collisions has been developed. A communication study based on IEEE 802.11p to validate the proposed solution is presented. The whole system has been tested in real scenarios both in simulation and with real vehicles with a good performance.
Making transport safer: V2V-based automated emergency braking system
(Technical University (VGTU) Press Technika, 2011) Simó Reigadas, Francisco Javier; Milanés, Vicente; Onieva, Enrique; Pérez, Joshué; González, Carlos; Pedro, Teresa de
An important goal in the field of intelligent transportation systems (ITS) is to provide driving aids aimed at preventing accidents and reducing the number of traffic victims. The commonest traffic accidents in urban areas are due to sudden braking that demands a very fast response on the part of drivers. Attempts to solve this problem have motivated many ITS advances including the detection of the intention of surrounding cars using lasers, radars or cameras. However, this might not be enough to increase safety when there is a danger of collision. Vehicle to vehicle communications are needed to ensure that the other intentions of cars are also available. The article describes the development of a controller to perform an emergency stop via an electro-hydraulic braking system employed on dry asphalt. An original V2V communication scheme based on WiFi cards has been used for broadcasting positioning information to other vehicles. The reliability of the scheme has been theoretically analyzed to estimate its performance when the number of vehicles involved is much higher. This controller has been incorporated into the AUTOPIA program control for automatic cars. The system has been implemented in Citroën C3 Pluriel, and various tests were performed to evaluate its operation.