The distributed diagnosis system of vehicles based on TH-OSEK embedded platform

We proposed a fully-software distributed failure diagnosis system for vehicles based on the TH-OSEK real-time embedded OS platform we previously developed. The diagnosis system puts all the ECUs into a virtual logical ring and uses the MR(Maintain Ring) algorithm and OL(Off Line) algorithm to detect a faulted ECU and isolate it without destroying the structure of the logical ring. When a faulted ECU is recovered, with the proposed algorithms the system can also add it to the logical ring by updating the predecessor and successor of every node in the ring in time. The experiment result on the TH-OpenECU platform is also presented which shows that the system works well and usefulness for diagnosing the faults of vehicles.