Sepulcre M.,University Miguel Hernandez |
Gozalvez J.,University Miguel Hernandez |
Hernandez J.,IDIADA Automotive Technology SA
Transportation Research Part C: Emerging Technologies | Year: 2013
Cooperative vehicular communication systems are being developed to improve traffic safety and efficiency through the wireless exchange of information between vehicles and between vehicles and infrastructure units. The future deployment of cooperative active safety applications requires their prior extensive testing due to their critical nature and strict quality of service requirements. Such testing should consider challenging driving and communications conditions that could significantly impact the applications' effectiveness. In this context, this paper presents a cooperative communications testing platform implemented to evaluate the operation and effectiveness of cooperative active safety applications under challenging driving and communications conditions. The paper also reports the results of an extensive testing campaign that reveals potential limitations of cooperative technologies and applications, and discusses possible countermeasures to overcome the applications' effectiveness degradation under adverse operating conditions. © 2012 Elsevier Ltd.
Pozo F.,Polytechnic University of Catalonia |
Arruga I.,IDIADA Automotive Technology SA |
Mujica L.E.,Polytechnic University of Catalonia |
Ruiz M.,Polytechnic University of Catalonia |
Podivilova E.,South Ural State University
Structural Health Monitoring | Year: 2016
This article introduces a new methodology for the detection of structural changes using a statistical data-driven modeling approach by means of a distributed piezoelectric active sensor network at different actuation phases. The three main features that characterize the proposed methodology are (a) the nature of the data used in the test since vectors of principal component analysis projections are used instead of the entire measured response of the structure or the coefficients of an AutoRegressive model, (b) the number of data used since the test is based on two random samples instead of some characteristic indicators, and (c) the samples come from a multidimensional variable and therefore a test for the plausibility of a value for a normal population mean vector is performed. The framework of multivariate statistical inference is used with the objective of the classification of structures in healthy or damaged. The novel scheme for damage detection presented in this article —based on multivariate inference over the principal component analysis projections of the raw data—is applied, validated, and tested on a small aluminum plate. The results show that the presented methodology is able to accurately detect damages, that is, for each actuation phase, a unique and reliable damage detection indicator is obtained no matter the number of sensors and/or actuators. It is worth noting that a major contribution of this article is that there exists an entire range of significance levels where the multivariate statistical inference is able to offer a correct decision although all of the univariate tests make a wrong decision. © 2016, The Author(s) 2016.
Eriksson H.,SP Electronics |
Jacobson J.,SP Electronics |
Herard J.,SP Electronics |
Lesemann M.,RWTH Aachen |
Aparicio A.,IDIADA Automotive Technology SA
Advanced Microsystems for Automotive Applications 2012: Smart Systems for Safe, Sustainable and Networked Vehicles | Year: 2012
Performance testing provides an unbiased way of presenting the benefits of active safety systems. However, some issues must be solved before performance testing can be executed for a system targeting a specific traffic scenario. First of all, the selected scenarios must be motivated; second, a suitable driver model shall be selected; and finally, a generic test target shall be defined. All these issues will be addressed in this paper.
Canellas S.,IDIADA Automotive Technology SA
SAE Technical Papers | Year: 2011
The dynamic behaviour of vehicles for the Indian market is tailored to specific road conditions. Roads in India are particularly demanding for the chassis and suspension systems. Although the quality of roads has improved over the years, there are still a high percentage of roads in poor condition, especially after the monsoon period, which significantly deteriorates the road surface. The intensive traffic and overloading of vehicles also add to the problem of road deterioration. When taking into account the road conditions, road clearance for vehicles in India must be higher than the design specifications in other markets in order to protect the mechanical parts of the vehicle against road obstacles. This has a considerable effect on the dynamic performance of the vehicle and subsequently on dynamic safety when driving over 80 km/h. Additionally, the quality of the chassis components and systems at the production line has to be monitored, to prevent inconsistent vehicle behaviour between vehicles manufactured. Divergences on vehicle performance can lead to safety and stability issues. This paper covers the process of tuning a chassis for the Indian market, including the suspension and steering systems. Dynamic safety is therefore a major primary safety requirement with enormous potential to reduce road accidents. It is the combination of not only passive chassis systems (tires, suspensions, etc.) but also Active Chassis Systems (ESC, ABS) which determines the overall dynamic safety performance of the vehicle. This paper explains the specifics of chassis development, testing and tuning of vehicles for the Indian market, including the influence of key chassis systems and components to improve the steering performance and vehicle stability and ultimately reduce the number of accidents on the Indian roads. Copyright © 2011 SAE International and Copyright © 2011 SIAT, India.
Badea-Romero A.,Technical University of Madrid |
Javier Paez F.,Technical University of Madrid |
Furones A.,Technical University of Madrid |
Barrios J.M.,IDIADA Automotive Technology SA |
de-Miguel J.L.,Research Institute for Automobile Repairs
Safety Science | Year: 2013
The compulsory fitting of the brake assist system (BAS) for new vehicles in the European Union has been recently established by Regulation (EC) 78/2009 to enhance the protection of pedestrians. This paper describes the main findings of a coordinated study performed by four Spanish Safety Research Centres aimed at assessing the potential influence of the BAS in vehicle-pedestrian collisions through the reconstruction of real-world accidents that occurred in three different cities of Spain. A total of 139 vehicle-pedestrian collisions were investigated in-depth following a common methodology, including on-the-spot data collection, analysis and reconstruction to estimate the collision speed and the pedestrian kinematics. A specific procedure was defined to emulate, through computer simulations, the performance of the BAS acting together with the antilock braking system (ABS). The benefit was assessed in terms of both collision speed and Injury Severity Probability (ISP) by comparing the reduction of their values from the real conditions to the virtual BAS. +. ABS simulations. The pedestrian ISP was estimated, depending on the collision speed and the head impact point, using a specific application that calculated its value based on the results of headform impact laboratory tests. The ISP values obtained in both conditions were compared. The findings show that while implementing the BAS. +. ABS would not have prevented the collision in most of the cases, it would have reduced their consequences in terms of the estimated ISP. It was also found that in few cases, a small reduction in the collision speed would increase the head injury severity. © 2012 Elsevier Ltd.