Refine
Keywords
- Bewertung (2)
- Conference (2)
- Deutschland (2)
- Evaluation (assessment) (2)
- Fahrerassistenzsystem (2)
- Germany (2)
- Knotenpunkt (2)
- Konferenz (2)
- Leistungsfähigkeit (allg) (2)
- Simulation (2)
- Accident (1)
- Accident prevention (1)
- Active safety system (1)
- Advanced driver assistance system (1)
- Aktives Sicherheitssystem (1)
- Antikollisionssystem (1)
- Collision (1)
- Collision avoidance system (1)
- Digital model (1)
- Driver assistance system (1)
- Effectiveness (1)
- Efficiency (1)
- Geschwindigkeit (1)
- Intersection (1)
- Junction (1)
- Numerisches Modell (1)
- Output (1)
- Schweregrad (Unfall (1)
- Severity (accid (1)
- Speed (1)
- Unfall (1)
- Unfallverhütung (1)
- Verletzung) (1)
- Zusammenstoß (1)
- injury) (1)
Institute
- Sonstige (2) (remove)
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.
Assessment of the effectiveness of Intersection Assistance Systems at urban and rural accident sites
(2015)
An Intersection Collision Avoidance System is a promising safety system for accident avoidance or injury mitigation at junctions. However, there is still a lack of evidence of the effectiveness, due to the missing real accident data concerning Advanced Driver Assistance Systems. The objective of this study is the assessment of the effectiveness of an Intersection Collision Avoidance System based on real accidents. The method used is called virtual pre-crash simulation. Accidents at junctions were reconstructed by using the numerical simulation software PC-Crashâ„¢. This first simulation is called the baseline simulation. In a second step the vehicles of these accidents were equipped with an Intersection Collision Avoidance System and simulated again. The second simulation is called the system simulation. In the system simulation two different sensors and four different intervention strategies were used, based on a time-to-collision approach. The effectiveness of Intersection Collision Avoidance System has been evaluated by using an assessment function. On average 9% of the reviewed junction accidents could have been avoided within the system simulations. The other simulation results clearly showed a change in the principal direction of force, delta-v and reduction of the injury severity.