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Motorcycling is a fascinating kind of transportation. While the riders' direct exposure to the environment and the unique driving dynamics are essential to this fascination, they both cause a risk potential which is several times higher than when driving a car. This chapter gives a detailed introduction to the fundamentals of motorcycle dynamics and shows how its peculiarities and limitations place high demands on the layout of dynamics control systems, especially when cornering. The basic principles of dynamic stabilization and directional control are addressed along with four characteristic modes of instability (capsize, wobble, weave, and kickback). Special attention is given to the challenges of braking (brake force distribution, dynamic over-braking, kinematic instability, and brake steer torque induced righting behavior). It is explained how these challenges are addressed by state-of-the-art brake, traction, and suspension control systems in terms of system layout and principles of function. It is illustrated how the integration of additional sensors " essentially roll angle assessment " enhances the cornering performance in all three categories, fostering a trend to higher system integration levels. An outlook on potential future control systems shows exemplarily how the undesired righting behavior when braking in curves can be controlled, e.g., by means of a so-called brake steer torque avoidance mechanism (BSTAM), forming the basis for predictive brake assist (PBA) or even autonomous emergency braking (AEB). Finally, the very limited potential of brake and chassis control to stabilize yaw and roll motion during unbraked cornering accidents is regarded, closing with a promising glance at roll stabilization through a pair of gimbaled gyroscopes.
Nach einer Reisebusunfallserie im Jahre 1992 wurde die Bundesanstalt für Straßenwesen beauftragt ein Expertengespräch durchzuführen und eine Projektgruppe einzurichten, um Schwachstellen im Sicherheitssystem des Reisebusverkehrs aufzudecken, Verbesserungsvorschläge zu erarbeiten und den Forschungsbedarf zu identifizieren. Der Beitrag befasst sich schwerpunktmäßig mit den ökonomischen Rahmenbedingungen und der Sicherheit, den Ausbildungs- und Eignungsfragen der Busfahrer, deren Belastung und Beanspruchung, der Einhaltung und Kontrolle von Vorschriften, der Erhöhung der kraftfahrzeugtechnischen Sicherheit sowie dem Notfall- und Unfallmanagement. Zur Weiterentwicklung des Sicherheitssystems wird eine auf breite Mitwirkung auch von Beteiligten angelegte Sicherheitsforschung für den Wirtschaftsverkehr empfohlen. Aus den untersuchten Feldern werden Empfehlungen abgeleitet und der notwendige Forschungsbedarf aufgeführt.
Für eine quantitativ exakte Beschreibung der mit der Gefahrgutbeförderung verbundenen Risiken fehlen sowohl statistische Voraussetzungen als auch eine wissenschaftlich begründete Risikoanalyse. Eine Risikoanalyse der Gefahrgutbeförderung soll zweckmäßigerweise auf Transportketten und nicht auf den direkten Vergleich von Verkehrsträgern abstellen. Zentrale Kategorie zur Definition des Risikos sollte dabei der Unfall sein. Zusammen mit der Transportleistung sollte er das Risiko als Wahrscheinlichkeitsaussage beschreiben. Mit in die Risikobestimmung einzubeziehen ist die Unfallschwere. Im Rahmen des Beitrages schlägt eine Projektgruppe eine dreistufig angelegte Risikoanalyse vor. Die Bausteine dieser Risikoanalyse bestehen aus 1. einer mathematisch-statistischen Risikoanalyse, 2. einer Schwachstellenanalyse und 3. einem Systemmodell zur ständigen Analyse des Gefahrgutbeförderungsrisikos. Dazu werden in dem Forschungsbericht grundsätzliche Überlegungen zur Risikobewertung angestellt, auf das Regelwerk des Gefahrguttransportes eingegangen, Ausbildung, Training und Überprüfung der Fahrzeugführer behandelt sowie auf das Gefahrgut und die Gefahrgutumschließung eingegangen. Ferner befasst sich der Bericht mit der Fahrzeugtechnik, der Verkehrsinfrastruktur, Informationssystemen und der Sicherheit im Gefahrguttransport in den neuen Bundesländern. Zum Schluss werden Forschungsempfehlungen bezüglich der Sicherheit in der Gefahrgutbeförderung formuliert.
EEVC Status report
(2001)
Erfahrungen in Deutschland mit der Anwendung der EU-Empfehlung "Europäischer Grundsatzkatalog zur Fahrer-Fahrzeug-Schnittstelle für Informations- und Kommunikationssysteme" werden beschrieben und daraus Konsequenzen abgeleitet. Insgesamt ist die ergonomische Bewertung der Mensch-Maschine-Schnittstelle von Fahrerinformations- und -Kommunikationssystemen nicht als einmaliges Ereignis, sondern als immer wieder zu durchlaufender Vorgang anzusehen, da neben neuen wissenschaftlichen Erkenntnissen jeweils neu entwickelte Geräte und Systeme zu berücksichtigen sind, was eine Anpassung der Grundsätze beziehungsweise eine Öffnung der Grundsätze für technische Neuerungen mit hohem Sicherheitsstandard erfordern könnte. Demonstrationen neuartiger Bedienkonzepte, Systementwicklungen und Arbeitstechniken sowie die hierzu durchgeführten Nutzertests verdeutlichen, dass ergonomisch sehr vielversprechende Lösungen (wie zum Beispiel Schnittstellen, die Eingaben mittels Gestik gestatten) existieren, beziehungsweise sich in der Entwicklung befinden. Diese Lösungen zeigen, dass die Empfehlung in weiten Bereichen technologieabhängig, das heißt, mit Blick auf Neuentwicklungen, nicht erschöpfend ist. Die Weiterentwicklung der Grundsätze sowie die Bewertung der sicheren Gestaltung der Mensch-Maschine-Schnittstelle bedarf nicht nur einer europaweit, sondern weltweit abgestimmten Vorgehensweise.
Topics of this report are: Securing mobility and making mobility sustainable - Strategies for road safety: Safe behavior, Safe vehicles, Safe infrastructure, Telematics, International vehicle-engineering measures " Accident statistics " Accident research " Passive vehicle safety " Active vehicle safety " Driver assistance systems " Environmental protection through vehicle engineering.
Topics of the status report are: Road accidents in Germany " Socio-economic costs due to road traffic accidents in Germany " Vehicle population and road performance " Electromobility " Alternative power train technologies: market penetration and consequences. The following research subjects are presented: Safety of electric vehicles " Driving dynamics of electric propelled vehicles " New requirements for the periodic technical inspection of electric and hybrid vehicles " Forward looking safety systems " Periodic roadworthiness tests " Cooperative systems: integration of existing systems " Safety related traffic information " Urban space: User oriented assistance systems and network management " Automated driving " Study on camera-monitor-systems " Freight transport " BioRID TEG, dummy harmonization " Frontal impact and compatibility " Child safety " FlexPLI " GIDAS: a blueprint for worldwide in-depth road accident investigations " Druid: Driving under the influence of drugs, alcohol and medicines " Smoke and toxicity in bus fires.
Proposal for a test procedure of assistance systems regarding preventive pedestrian protection
(2011)
This paper is showing a proposal for a test procedure regarding preventive pedestrian protection based on accident analysis. Over the past years pedestrian protection has become an increasing importance also during the development phase of new vehicles. After a phase of focusing on secondary safety, there are current activities to detect a possible collision by assistance systems. Such systems have the task to inform the driver and/or automatically activate the brakes. How practical is such a system? In which kind of traffic situations will it work? How is it possible to check the effectiveness of such a system? To test the effectiveness, currently there are no generally approved identifiable procedures. It is reasonable that such a test should be based on real accidents. The test procedure should be designed to test all systems, independent of the system- working principle. The vFSS group (advanced Forward-looking Safety Systems) was founded to develop a proposal for a technology independent test procedure, which reflects the real accident situation. This contribution is showing the results of vFSS. The developed test procedure focuses on accidents between passenger cars and pedestrians. The results are based on analysis results of in-depth databases of GIDAS, German insurers and DEKRA and added by analysis of national and international statistics. The in-depth analysis includes many pre-crash situations with several influencing factors. The factors are e. g. speed of the car, speed of the pedestrian, moving direction and a possible obscuration of the pedestrian by an object. The results comprise also the different situations of adults and children. Furthermore, they include details regarding influence of the lighting conditions (daylight or night) especially with respect to the accident consequences. In fact, more accidents happen at daylight, but fatal accidents are more often at night. A clustering of parameter combinations was found which represents typical accident scenarios. There are six typical accident scenarios which were merged in four test scenarios. The test scenarios are varying the starting position of the pedestrian, the pedestrian size (adult or child) and the speed of the pedestrian, whereas the speed of the car will not be varied. To ensure the independency from used sensing technologies it is necessary to use a suitable dummy. For example, if sensors are based on infrared, the dummy should emit the temperature of a human being. The test procedure will identify the collision speed as the key parameter for assessing the effectiveness of the tested system. The collision speed is defined as the reduction between initial test speed of the car and impact speed. The assessment of the speed reduction value regarding the safety benefit, however, will be part of a separate procedure.
Topics of this report are: Road accidents in Germany - Socio-economic costs due to road traffic accidents - Vehicle population and road performance " Automotive IT " Electromobility. The following research subjects are presented: Safety of electric vehicles - Forward looking safety systems - Cooperative systems - Safety related traffic information - Freight transport: Action plan freight transport and trial with longer trucks - Lane departure warning systems and Advanced emergency braking systems (AEBS) for heavy duty vehicles - Dummy harmonization " Compatibility - Child safety - Virtual testing - Driving under the influence of drugs, alcohol and medicines - Fire safety of buses - Milled shoulder rumble strips - Conspicuity of powered-two-wheelers - Automatically dipped high beam and rear view mirrors.
Technical progress in automotive engineering focuses at the moment on two competing branches: improving safety and reducing energy consumption. Recent consideration has been given to a third factor, cost to the consumer. Challenges are presented by demographic changes, especially with increasing participation of elderly people in road traffic. The report considers the recent history of road accidents in Germany and statistics relating to vehicle population and road performance. There is a general trend towards decreasing numbers of accidents and their severity. Transport is responsible for roughly 20% of CO2 emissions and approximately 70% of total petroleum consumption. The Federal Government has responded to these challenges by publishing the Freight Transport and Logistics Masterplan in the summer of 2008. It describes the strategic transport policy direction and the key elements of the future course of action which are to be used to ensure the provision of efficient infrastructure and, at the same time, to reduce the amount of energy consumed by vehicles and make transport more efficient, cleaner and quieter. This document contains a number of concrete measures subsumed under the following six objectives: Making optimum use of transport infrastructure - shaping transport to make it more efficient; Reducing the number of journeys - ensuring mobility; Transferring more traffic to the railways and inland waterways; Upgrading more transport arteries and hubs; Environmentally friendly, climate friendly, quiet and safe transport, and Good working conditions and good training in the freight transport industry. Progress in research is outlined in the following areas: Daytime Running Lights for Motorcycles; Safety of hydrogen vehicles - addressing safety and environmental issues by development of a Global Technical Regulation for hydrogen vehicles; Elements of active vehicle safety for elderly drivers; Periodical Technical Inspection of electronically controlled systems in road vehicles - Electronic Stability Control; Pedestrian protection; Crash Compatibility - role of collision partner in passive safety tests; Child safety; Euro NCAP - Child Restraint Systems, and German Field Operational Test on Car-to-Car and Car-to-Infrastructure Systems (SIM-TD). The research project AKTIV - "Adaptive and Cooperative Technologies for Intelligent Traffic" encompasses the design, development, and evaluation of novel driver assistance systems, knowledge and information technologies and is set up to find solutions for efficient traffic management and Car-to-Car and Car-to-Infrastructure communication for future cooperative vehicle applications. The European Statement of Principles on the Human Machine Interface (HMI), presented at the eSafety Conference, which was held in Berlin on 5/6 June 2007, addresses issues such as Real Time Traffic Information (RTTI), Legal issues of Advanced Driver Assistance Systems (ADAS) and e-security.
In 2012 the fifth ESAR conference (Expert Symposium on Accident Research) was held in Hannover. ESAR is an international convention of experts, who analyze traffic accidents all over the world and discuss their results in this context, conducted at the Medizinische Hochschule Hannover every 2 years. It connected representatives of public authorities, engineers in automotive development and scientists and offers a forum with particular emphasis on In-Depth-Analyses of accident statistics and accident analyses. Special focus is placed on research on the basis of so-called "In-Depth-Accident-Investigations" [data collections at the sites of the accidents], which are characterized by extensive documentations of the sites of the accidents, of the vehicles as well as of the injuries, encompassing several scientific fields. ESAR aims at a multi-disciplinary compilation of scientific results and at discussing them on an international, scientific level. It is thus a scientific colloquium and a platform for exchanging information for all accident researchers. Experiences in accident prevention as well as in the complex field of accident reconstruction are stated and new research fields are added. Existing results of long-term research work in Europe, the US, Australia and Japan include different infrastructural correlations and give findings on population, vehicle population and driver characteristics, which offer a basis for recommendations to be derived and measures for increasing road safety.
Der Allgemeine Deutsche Automobil-Club e.V. (ADAC) und die Bundesanstalt für Straßenwesen (BASt) veranstalteten am 13. Oktober 2006 in Baden-Baden das 6. Symposium "Sicher fahren in Europa". Die Fachvorträge befassten sich mit den Themenbereichen: Ansätze zu mehr Verkehrssicherheit, - Verbesserung der Fahrzeugsicherheit, - Besondere Zielgruppen. Die CD-ROM dokumentiert die Grußworte, die Referate und die Podiumsdiskussion.