CAN总线的安全性研究进展

摘要

给出了CAN总线的假冒错故障的成因与故障率分析,得到 Pmasq．11＝9．11×10－11和 Pmasq．29＝1．70×10－10,值得高层协议(如CANopen、J1939等)使用者注意.对于CAN FD 的功能安全,2014年最新的改进仍然存在错帧漏检大以及假冒错问题,提出了同时利用CAN总线实现二级中断的想法,使实现自愈总线成为可能.%This paper puts forward the cause and fault analysis of fake wrong fault of CAN bus.Pmasq.11=9.11×10-11 and Pmasq.29=1.70× 10-10 are obtained.Higher layer protocol user like CANopen,J1939 should pay special attention to this error.It is pointed that the im-provement in 2014 version did not solve the problems and it also faces the masquerade problem about the functional safety of CAN FD. So using CAN bus to realize the idea of two level interrupt is proposed,which can achieve the possibility of self-healing bus.