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Evaluation of a momentum based impact model and application in an effectivity study considering junction accidents

  • The advent of active safety systems calls for the development of appropriate testing methods. These methods aim to assess the effectivity of active safety systems based on criteria such as their capability to avoid accidents or lower impact speeds and thus mitigate the injury severity. For prospective effectivity studies, simulation becomes an important tool that needs valid models not only to simulate driving dynamics and safety systems, but also to resolve the collision mechanics. This paper presents an impact model which is based on solving momentum conservation equations and uses it in an effectivity study of a generic collision mitigation system in reconstructed real accidents at junctions. The model assumes an infinitely short crash duration and computes output parameters such as post-crash velocities, delta-v, force directions, etc. and is applicable for all impact collision configurations such as oblique, excentric collisions. Requiring only very little computational effort, the model is especially useful for effectivity studies where large numbers of simulations are necessary. Validation of the model is done by comparison with results from the widely used reconstruction software PC-Crash. Vehicles involved in the accidents are virtually equipped with a collision mitigation system for junctions using the software X-RATE, and the simulations (referred to as system simulations) are started sufficiently early before the collision occurred. In order to assess the effectivity, the real accident (referred to as baseline) is compared with the system simulations by computing the reduction of the impact speeds and delta-v.

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Author:Harald Kolk, Ernst Tomasch, Wolfgang Sinz, Jörg Bakker, Jan Dobberstein
Document Type:Conference Proceeding
Date of Publication (online):2017/10/18
Year of first publication:2017
Contributing corporation:Institut für Fahrzeugsicherheit (Graz)
Release Date:2017/10/18
Tag:Aktives Sicherheitssystem; Bewertung; Deutschland; Fahrerassistenzsystem; Geschwindigkeit; Knotenpunkt; Konferenz; Leistungsfähigkeit (allg); Numerisches Modell; Simulation; Unfall; Zusammenstoß
Accident; Active safety system; Advanced driver assistance system; Collision; Conference; Digital model; Effectiveness; Evaluation (assessment); Germany; Junction; Output; Simulation; Speed
Außerdem beteiligt: Daimler AG, Accident Research and Risk Assessment
Source:7th International Conference on ESAR "Expert Symposium on Accident Research" 2016
Institutes:Sonstige / Sonstige
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
collections:BASt-Beiträge / ITRD Sachgebiete / 80 Unfallforschung
BASt-Beiträge / ITRD Sachgebiete / 91 Fahrzeugkonstruktion
BASt-Beiträge / Tagungen / International Conference on ESAR / 7th International Conference on ESAR
Licence (German):License LogoBASt / Link zum Urhebergesetz

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