In a conventional vehicle all safety-critical subsystems are controlled by the mechanics and only assisted by the electronics to prolong its functionality. However the last responsibility classically bears the mechanics. The approach presented here replaces mechanical backups by highly reliable, fail-operational electronics. The n-duplex approach to redundancy leverages scalability with respect to functional performance and operational availability. The platform concept is based on a clear separation of responsibilities, where intelligent aggregates are connected to power and Ethernet network only without using designated signal lines. On the way to more convenient, assisted and autonomous driving there are three aspects to be developed in future vehicles. Obvious is the need of ADAS functions that will assume duties and responsibilities of the driver. In the end, these functions will and have to take corrective actions to the drivers command. Although some people decline it, this is necessary to achieve "Zero Accidents". Second is the need of smart sensors and actuators that complement such functions. Highly integrated wheel-hub e-motors will be the lowcost, high function starting point for such a development. Mechanical and thus human control backups are then no longer possible, because the driver is hardly able to take over control in assisted driving situations. The third and main aspect covered in this article is the high-available communication backbone necessary to facilitate above innovations, supporting a fail operational system behavior. The approach described within this paper will be transferred to the BMWi-funded project RACE which aims at the development of an ICT as shown before. Consortium partners are Siemens, AVL, TRW, fortiss, TUM (RCS and SSE), RWTH Aachen (EONERC and ISEA) and Fraunhofer AISEC.
Ethernet-based and function-independent vehicle control-platform: Motivation, idea and technical concept fulfilling quantitative safety-requirements from ISO 26262
2012
17 Seiten, 8 Bilder, 4 Quellen
Aufsatz (Konferenz)
Englisch
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