Improved System Architecture for Safety-Relevant Systems using Dynamic Distribution and State Buffering

Authors:	Nenninger Philipp, University of Karlsruhe (TH), Germany Rooks Oliver, University of Karlsruhe (TH), Germany Kiencke Uwe, University of Karlsruhe (TH), Germany
Topic:	7.1 Automotive Control
Session:	Automotive Diagnosis and Warning
Keywords:	Distributed Systems, Fault Tolerant Systems, Drive-by-Wire, State Server

Abstract

Drive-by-wire systems are gaining ground in the automotive industryand approaching maturity. In this paper the state of the art is presented, whichis a static Duo Duplex system and focus on two crucial components, the input managementand the output-management. Additionally a novel architecture basedon fail silent units which uses dynamic distribution of functions within the systemis proposed. In order to eliminate the transitional phase in controller functions,a fault-tolerant State Server is introduced, which stores the states of all safety relevantfunctions.