A Functional Brake Architecture for Autonomous Heavy Commercial Vehicles

Paper #:
  • 2016-01-0134

Published:
  • 2016-04-05
DOI:
  • 10.4271/2016-01-0134
Citation:
Behere, S., Zhang, X., Izosimov, V., and Törngren, M., "A Functional Brake Architecture for Autonomous Heavy Commercial Vehicles," SAE Technical Paper 2016-01-0134, 2016, https://doi.org/10.4271/2016-01-0134.
Pages:
9
Abstract:
Heavy commercial vehicles constitute the dominant form of inland freight transport. There is a strong interest in making such vehicles autonomous (self-driving), in order to improve safety and the economics of fleet operation. Autonomy concerns affect a number of key systems within the vehicle. One such key system is brakes, which need to remain continuously available throughout vehicle operation. This paper presents a fail-operational functional brake architecture for autonomous heavy commercial vehicles. The architecture is based on a reconfiguration of the existing brake systems in a typical vehicle, in order to attain dynamic, diversified redundancy along with desired brake performance. Specifically, the parking brake is modified to act as a secondary brake with capabilities for monitoring and intervention of the primary brake system. A basic fault tree analysis of the architecture indicates absence of single points of failure, and a reliability analysis shows that it is reasonable to expect about an order of magnitude improvement in overall system reliability.
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