F2008-05-114
A Fault Tolerance Architecture for Drive-by-Wire Automotive System
The automotive systems of next generation trend to apply the x-by-wire technology, which brings benefits to have the ability to insert new functions, such as increasing the comfort, security, diagnostic and ease in maintenance. The x-by-wire automotive systems are functions implemented by electro-electronic devices with sensors, the ECU (electronic control unit) and actuators interconnected by a communication bus in which completely replaced the traditional functions performed by mechanical and hydraulic devices. As examples of commercially produced systems with x-by-wire functions are: steer-by-wire, brake-by-wire, throttle-by-wire and gear-by-wire, among others. The x-by-wire systems are safety-critical systems, where the project needs to consider the use of fault tolerance techniques to support some faults mode. Meanwhile the x-by-wire systems are in control systems that employ control algorithms according to performed function. In this work is proposed a functional architecture of a drive-by-wire automotive system, with the steer-by-wire, brake-by-wire and throttle-by-wire functions. A message map with their temporal properties is presented and simulations with the functional characteristics are verified. The simulations are carried out assuming a bus of communication FTT-CAN or with activations of messages and event-trigger time-trigger. However a fault tolerant architecture is considered as FTT-CAN bus as fault tolerant communication system. They are considered that the fault tolerant architecture tolerates some modes of alleged faults in a time of design and functionality that can be guaranteed.
This abstract is supplemented by a PDF, which can be viewed here.
Poster presentation: Electronics