5th International Conference on ESAR
Filtern
Schlagworte
- Deutschland (40)
- Konferenz (40)
- Conference (39)
- Germany (39)
- Reconstruction (accid) (19)
- Unfallrekonstruktion (19)
- Injury (14)
- On the spot accident investigation (14)
- Untersuchung am Unfallort (14)
- Verletzung (14)
- Schweregrad (Unfall (13)
- injury) (13)
- Severity (accid (12)
- Verletzung) (12)
- Accident (10)
- Unfall (10)
- Fatality (9)
- Simulation (9)
- Tödlicher Unfall (9)
- Database (7)
- Datenbank (7)
- Driver assistance system (7)
- Fahrerassistenzsystem (7)
- Aktives Sicherheitssystem (6)
- Anfahrversuch (6)
- Collision (6)
- Statistics (6)
- Statistik (6)
- Zusammenstoß (6)
- Active safety system (5)
- Analyse (Math) (5)
- Analysis (math) (5)
- Cyclist (5)
- Driver (5)
- Fahrer (5)
- Fußgänger (5)
- Impact test (veh) (5)
- Pedestrian (5)
- Radfahrer (5)
- Safety (5)
- Sicherheit (5)
- Alte Leute (4)
- Bewertung (4)
- Bremse (4)
- Evaluation (assessment) (4)
- Fahrzeug (4)
- Insasse (4)
- Method (4)
- Motorcycle (4)
- Motorcyclist (4)
- Motorrad (4)
- Motorradfahrer (4)
- Old people (4)
- Vehicle (4)
- Vehicle occupant (4)
- Verfahren (4)
- Brake (3)
- Cause (3)
- Coefficient of friction (3)
- Efficiency (3)
- Europa (3)
- Europe (3)
- Fahranfänger (3)
- Forecast (3)
- Measurement (3)
- Messung (3)
- Passive safety system (3)
- Passives Sicherheitssystem (3)
- Prognose (3)
- Prüfverfahren (3)
- Recently qualified driver (3)
- Reibungsbeiwert (3)
- Risiko (3)
- Risk (3)
- Test method (3)
- Ursache (3)
- Accident prevention (2)
- Antikollisionssystem (2)
- Auffahrunfall (2)
- Automatisch (2)
- Behaviour (2)
- Car (2)
- Child (2)
- China (2)
- Compatibility (2)
- Driver training (2)
- Error (2)
- Fahrausbildung (2)
- Fahrgeschicklichkeit (2)
- Fehler (2)
- Griffigkeit (2)
- Head (2)
- Hospital (2)
- Improvement (2)
- India (2)
- Indien (2)
- Interview (2)
- Kind (2)
- Kompatibilität (2)
- Kopf (2)
- Krankenhaus (2)
- LKW (2)
- Leistungsfähigkeit (allg) (2)
- Lorry (2)
- Oberflächentextur (2)
- Overturning (veh) (2)
- PKW (2)
- Skidding resistance (2)
- Skill (road user) (2)
- Surface texture (2)
- Test (2)
- Unfallverhütung (2)
- United kingdom (2)
- Vehicle regulations (2)
- Verbesserung (2)
- Vereinigtes Königreich (2)
- Verhalten (2)
- Versuch (2)
- Wirbelsäule (2)
- Überschlagen (2)
- Abkommen von der Fahrbahn (Unfall) (1)
- Acceleration (1)
- Accident rate (1)
- Active safety system; Automatic; Brake; Car; Collision avoidance system; Conference; Driver assistance system; Germany; Impact test (veh); Rear end collision; Severity (accid (1)
- Anthropometric dummy (1)
- Apparatus (measuring) (1)
- Aufprallschlitten (1)
- Automatic (1)
- Befreiung (Bergung) (1)
- Benutzung (1)
- Berechnung (1)
- Beschleunigung (1)
- Bewehrung (1)
- Bicycle (1)
- Braking (1)
- Bremsung (1)
- Brustkorb (1)
- Calculation (1)
- Clothing (1)
- Collision avoidance system (1)
- Conference; Germany; Injury; Medical examination; Spinal column; X ray (1)
- Contact (tyre road) (1)
- Cost benefit analysis (1)
- Crash helmet (1)
- Czech Republic (1)
- Damping (1)
- Deformation (1)
- Depth (1)
- Digital model (1)
- Dreidimensional (1)
- Drunkenness (1)
- Dämpfung (1)
- EU (1)
- Eigenschaft (1)
- Ergonomics (1)
- Ergonomie (1)
- Erste Hilfe (1)
- Eu (1)
- Extrication (1)
- Fahrrad (1)
- Fahrzeugdach (1)
- Fahrzeugteil (Sicherheit) (1)
- Fatigue (human) (1)
- First aid (1)
- Front (1)
- Frontalzusammenstoß (1)
- Geografisches Information System (1)
- Geographical information system (1)
- Geschwindigkeit (1)
- Head on collision (1)
- Human factor (1)
- Impact sled (1)
- Interior (veh) (1)
- International (1)
- Japan (1)
- Kleidung (1)
- Kontakt Reifen Straße (1)
- Leistungsfähigkeit (Allg.) (1)
- Mathematical model (1)
- Matrix (1)
- Medizinische Untersuchung (1)
- Menschlicher Faktor (1)
- Messgerät (1)
- Modification (1)
- Müdigkeit (1)
- Nasse Strasse (1)
- Numerisches Modell (1)
- Organisation (1)
- Organization (association) (1)
- Pkw (1)
- Policy (1)
- Politik (1)
- Portable (1)
- Portugal (1)
- Properties (1)
- Prototyp (1)
- Prototype (1)
- Public transport (1)
- Quality management system (1)
- Qualitätsmanagementsystem (1)
- Rail bound transport (1)
- Rail traffic (1)
- Reaction (human) (1)
- Reaktionsverhalten (1)
- Rear end collision (1)
- Rechenmodell (1)
- Regression analysis (1)
- Regressionsanalyse (1)
- Reinforcement (in mater) (1)
- Residential area (1)
- Risikobewertung (1)
- Risk assessment (1)
- Road traffic (1)
- Road transport (1)
- Road user (1)
- Roof (veh) (1)
- Run off the road (accid) (1)
- Röntgenstrahlung (1)
- Schienentransport (1)
- Schienenverkehr (1)
- Schutzhelm (1)
- Schweiz (1)
- Speed (1)
- Spinal column (1)
- Stochastic process (1)
- Stochastischer Prozess (1)
- Straßentransport (1)
- Straßenverkehr (1)
- Switzerland (1)
- Technische Vorschriften (1)
- Technische Vorschriften (Kraftfahrzeug) (1)
- Thorax (1)
- Three dimensional (1)
- Tiefe (1)
- Tragbar (1)
- Transport operator (1)
- Transportunternehmen (1)
- Trunkenheit (1)
- Tschechische Republik (1)
- USA (1)
- Unfallhäufigkeit (1)
- Usa (1)
- Use (1)
- Vehicle safety device (1)
- Veletzung) (1)
- Verformung (1)
- Verkehrsteilnehmer (1)
- Versuchspuppe (1)
- Veränderung (1)
- Vorn (1)
- Wasser (1)
- Water (1)
- Wet road (1)
- Wirtschaftlichkeitsrechnung (1)
- Wohngebiet (1)
- Öffentlicher Verkehr (1)
Institut
- Sonstige (41)
- Abteilung Fahrzeugtechnik (2)
- Präsident (1)
The GIDAS-investigation team of Dresden (VUFO) has documented more than 11.500 accidents since 1999. The documentation of the accident includes beside vehicle-, injury- and environmental-data very detailed reconstruction data. Within this accident investigation the VUFO began to record the skid resistance of the accident site in 2009. The measurements are divided in macro- and microroughness (Sand depth method and Portable Skid Resistance Tester-SRT-by Munro-Stanley London-©). Both methods are used to determine the skid resistance for more than 1000 passenger cars. The aim of the present study is to find out a relationship between the measured skid resistance, the road conditions and the friction coefficient, which is used to calculate the maximum accelerations and decelerations during a reconstruction of an accident. Basic approach to convert the SRT-value into the friction coefficient is the calculation of the theoretical absorbed energy of the spring rubber system of the swinging arm of lever. This absorbed energy is used to get the friction coefficient by using the equations for the work of friction. To consider the road-behavior, in correlation to the friction coefficient, the results will be merged with existing literature. Last step for this study will be a comparison between actual used friction coefficients all over the GIDAS-database and the theoretical results. The study shows, if it is possible to use the SRT-Measurement for the estimation of a friction coefficient for the reconstruction of a traffic accident. As expected, the GIDAS-Database and the additional measurement of the roughness of the road directly on the spot are an enormous useful dataset.
The grip between the road surface and vehicle tires is the physical basis for the moving of all vehicles in road traffic. In case of an accident the available grip level is one of the most relevant influence factors, influencing the causation and the procedure of the accident. However, the estimation of the grip level is not easy and therefore, is commonly not done on the accident scene. This is especially true for the measurement of the water depth. Until now, real accident databases provide no measurement data about the grip level and the water film depth and thus, the estimation of its influence is not possible yet. From the tyre manufacturers point of view, it is important to know about the road conditions (namely grip level, macro-texture, water depth, temperature) at the accident scene, as well as the operating conditions of the vehicles (braking, loss of control, speed, etc). These data is necessary to define relevant tyre traction tests for the end-user and for regulations. For this reason VUFO and Michelin developed a consistent method for the measurements of grip level and water depth for the accidents of the GIDAS database. The accident research team of Dresden, which documents about 1000 accidents with at least one injured person every year, is measuring the micro-roughness and the macro-roughness directly on the spot. For the measurement of the micro-roughness a Skid Resistance Tester (British Pendulum) is used. The Mean Texture Depth (describing the macro-roughness) is measured by the Sand Depth Method. Since June 2009, measurements for more than 700 accidents including 1200 participants have been carried out. In case of wet or damp road conditions during the accident, the water depth is measured additionally. Therefore VUFO and Michelin developed a special measurement device, which allows measurements with an accuracy of 1/10 millimetre. The measurement point at the accident scene is clearly defined and thus, the results are comparable for all different accidents and participants. The use of the GIDAS database and the accident sampling plan allows representative statements for the German accident scenario. With this data it is possible for the first time to have an accurate view of the road conditions at the accident scene. One possibility is a more detailed estimation of hydroplaning accidents using the actually measured water depths. The development of new testing methods and new tires can be based on the real situation of the road infrastructure. Furthermore, the combination of the technical GIDAS data and the measured road surface properties can also be used for the estimation of effectiveness of several safety systems like the brake assist and/or emergency braking systems. The calculation of a reduced collision speed due to the use of a brake assist is only one example for the application of real measured grip level data.
Having a look at safety to traffic and the prevention of accidents it can be observed that technical improvements in active safety of vehicles have let to various positive effects in this area. Among other components the tyre-road-contact takes a key role in the development of active safety technologies. All forces in accelerating, breaking and vehicle guidance have to be transmitted through the tyre-road contact area by friction forces. A common way to characterize a friction process is to identify the coefficient of friction μ between two touching materials. Even though there are several approaches to experimentially characterise road surfaces, no standard method exists. In this paper an overview of existing test methods is given. Furthermore the preliminary design of a newly developed portable test device with its possibility to investigate the tyre-road-friction of arbitrary roads or even places of accidents is shown.
The European CASPER (Child Advanced Safety Project for European Roads) project studying car child safety includes a sociological approach in order to have a better understanding of the behaviour of parents driving children under 12 years old. A questionnaire was distributed via the internet in Europe with 998 parents (representing 1638 children) from 22 European countries responding. The results inform on the way parents secure their children during a car trip. Many parents did not control how their children were installed in the child restraint system (CRS). A toddler was more likely to travel into a child seat than an older child was. Regarding misuse situations, an important part of the participants did not think that they could make mistakes when fixing the child seat to the car (26%) or when placing the child into the seat (39%). This leaves an important field of action especially by communication via different media and in the CRS sale outlets.
The main objective of EC CASPER research project is to reduce fatalities and injuries of children travelling in cars. Accidents involving children were investigated, modelling of human being and tools for dummies were advanced, a survey for the diagnosis of child safety was carried out and demands and applications were analysed. From the many research tasks of the CASPER project, the intention of this paper is to address the following: • In-depth investigation of accidents and accident reconstruction. These will provide important points for the injury risk curve, in order to improve it. Different accident investigation teams collected data from real road accidents, involving child car passengers, in five different European countries. Then, a selection of the most appropriate cases for the injury risk curve and the purposes of the project was made for an in-depth analysis. The final stage of this analysis was to conduct an accident reconstruction to validate the results obtained. The in-depth analysis included on-scene accident investigation, creating virtual simulations of the accident/possible reconstruction, and conducting the reconstruction. In the cases of successful reconstructions, new points were introduced to the injury risk curves. Accident reconstructions of selected cases were carried out in test laboratories as the next step following in-depth road accident investigation. These cases were reconstructed using similar child restraint systems (CRS) and the same type make and model as in the real accidents. Reconstructing real cases has several limitations, such as crash angle, cars" approximation paths and crash speed. However, a few changes and applications on the testing conditions were applied to reduce the limitations and improved the representations of the real accidents. After conducting the reconstructions, a comparison between the deformations of the cars on the real accident and the vehicles from the reconstructions was made. Additionally, a correlation between the data captured from the dummies and the injury data from the real accident was sought. This finalises an in-depth analysis of the accident, which will provide new relevant points to the injury risk curve. The CASPER project conducted a large research programme on child safety. On technical points, a promising research area is the developing injury risk curves as a result of in-depth accident investigations and reconstructions. This abstract was written whilst the project was not yet finished and final results are not yet known, but they will be available by the time of the conference. All the works and findings will not necessarily be integrated in the industrial versions of evaluation tools as the CASPER project is a research program.
Although the number of road accident casualties in Europe (EU27) is falling the problem still remains substantial. In 2011 there were still over 30,000 road accident fatalities. Approximately half of these were car occupants and about 60 percent of these occurred in frontal impacts. The next stage to improve a car's safety performance in frontal impacts is to improve its compatibility. The objective of the FIMCAR FP7 EU-project was to develop an assessment approach suitable for regulatory application to control a car's frontal impact and compatibility crash performance and perform an associated cost benefit analysis for its implementation. This paper reports the cost benefit analyses performed to estimate the effect of the following potential changes to the frontal impact regulation: • Option 1 " No change and allow current measures to propagate throughout the vehicle fleet. • Option 2 " Add a full width test to the current offset Deformable Barrier (ODB) test. • Option 3 " Add a full width test and replace the current ODB test with a Progressive Deformable Barrier (PDB) test. For the analyses national data were used from Great Britain (STATS 19) and from Germany (German Federal Statistical Office). In addition in-depth real word crash data were used from CCIS (Great Britain) and GIDAS (Germany). To estimate the benefit a generalised linear model, an injury reduction model and a matched pairs modelling approach were applied. The benefits were estimated to be: for Option 1 "No change" about 2.0%; for Option 2 "FW test" ranging from 5 to 12% and for Option 3 "FW and PDB tests" 9 to 14% of car occupant killed and seriously injured casualties.
The utilisation of secondary-safety systems to protect occupants has attained a very high level over the past decades. Further improvements are still possible, but increasingly minor progress is only to be had with a high degree of effort. Thus, a key aspect must be the impact to overall safety in an accident. If reliable information is available on an imminent crash, measures already taken in the pre-crash phase can result in a significantly great influence on the outcomes of the crash. With this background preventive measures are the key to a sustainable further reduction of the figures of crash victims on our roads. This paper aims to show a preventive approach that can contribute to lessening the consequences of a crash by creating an optimum interaction of measures in the fields of primary and secondary safety. To further enhance vehicle safety, driver assistant systems are already available that warn the driver of an imminent front-to-rear-end crash. The next step is to support him in his reactions or if he fails to react sufficiently, to even initiate an automatic braking when the crash becomes unavoidable. Automatic pre-crash braking can, in an ideal situation, fully prevent a crash or can significantly reduce the impact speed and thus the impact energy (and the severity of the accident). If a vehicle is being braked in the pre-crash phase, the occupants are already being pre-stressed by the deceleration. The information available about the imminent crash can be used to activate the belt tensioners and likewise other secondary safety systems in the vehicle right before the impact. The pre-crash deceleration also causes the front of the vehicle to dip. Conventional crash tests do not take this specific impact situation into consideration. This is why, for example, the influences of the pre-crash displacements of the occupants are not recorded in the test results. Furthermore, a reproducible representation of the benefit of the vehicle safety systems which prepare the occupants for the imminent impact is not possible. In order to demonstrate the functions of automated pre-crash braking and to investigate the differences during the impact as a consequence of the altered occupant positions as well as the initiation of force and deformations of the vehicle front, DEKRA teamed up with BMW to carry out a joint crash test with the latest BMW 5 series vehicle. It involved the vehicle braking automatically from a starting test speed of 64 km/h (corresponding to the impact speed set by Euro NCAP) down to 40 km/h. The test was still run by the intelligent drive system of the crash test facility. This required several modifications to be made to the test facility as well as to the vehicle. The paper will describe and discuss some relevant results of the crash test. In addition, the possible benefits of such systems will also be considered. The test supplemented the work of the vFSS working group (vFSS stands advanced Forward-looking Safety Systems).
Nowadays human-created systems are increasing in complexity due to the interaction of humans and technology. Especially road traffic systems are composed of multitudinous resources (e.g. personnel, vehicles, organizations, etc.), which make it even harder to anticipate the positive and negative effects on safety. One key in achieving a significant reduction of fatalities is seen in driver assistant systems counterbalancing the lack of drivers' capabilities. But the actual outcome of implementing these sophisticated technologies especially on influencing driver's capabilities are yet unknown. Latest research exemplifies an increase of reaction times of drivers in case of dysfunctional driver assistant systems. This research paper applies STAMP/STPA (STAMP = systems-theoretic accident model and processes; STPA = systems-theoretic process analysis) to the German automobile traffic system focusing on the effects of driver assistant systems on drivers. By doing so, the potential hazards caused by technology can be identified.
The sequence of accident events can be classified by three essential phases, the pre-crash-sequence, the crash-sequence and the post-crash-sequence. The level of reliability of the information in the GIDAS-database (German In Depth Accident Study) is provided predominantly on the passive side. The period to evaluate active safety systems begins already in the pre-crash-sequence. The assessment of the potential of sensor- or communication-based active safety systems can only be accomplished by a detailed analysis of the pre-crash-phase. Hence the necessity to analyze the early period of the accident event in detail arises. This is possible with the help of the digital sketches of the accident site and the simulation of the accident by a simulation method of the VUFO GmbH. After simulating the pre-crash scenario it is possible to generate additional and standardized data to describe the pre-crash-sequences of an accident in a very high detail. These data are documented in a second database called the GIDAS Pre-Crash-Matrix (PCM). The PCM contains various tables with all relevant data to reproduce the pre-crash-sequence of traffic accidents from the GIDAS database until 5 seconds before the first collision. This includes parameters to describe the environment data, participant data and motion or dynamic data. This paper explains the creation of the PCM, the simulation itself and the contents and structure of the PCM. With this information of the pre-crash-sequence for various accident scenarios an improved benefit estimation and development of active safety systems can be made possible.
Rear-end collisions are the most frequent same and opposite-direction crashes. Common causes include momentary inattention, inadequate speed or inadequate distance. While most rear-end collisions in urban traffic only result in vehicle damage or slight injuries, rear-end collisions outside built-up areas or on motorways usually cause fatal or serious injuries. Driver assistance systems that detect dangerous situations in the longitudinal vehicle direction are therefore an essential safety plus. In view of this, for ADAC, systems that alert drivers to dangerous situations and initiate autonomous braking complement ESC as one of the most important active safety features in modern vehicles. The aim of ADAC is to provide consumers with technical advice and competent information about the systems available on the market. Reliable comparative tests that are based on standardised test criteria may provide motorists with important information and help them make a buying decision. In addition, they raise consumer awareness of the systems and speed up their market penetration. The assessment must focus on as many aspects of effectiveness as possible and include not only autonomous braking but also collision warning and autonomous brake assist. The work of the ADAC accident research is the development of the testing scenarios with direct link to accident situations and the identification of useful test criteria for testing.