摘要
FlexRay是为满足线控技术要求而开发的一种时间触发的通信协议,要求中最重要的是功能安全,它要服从以IEC61508和ISO26262为代表的标准。在简要叙述标准考虑的关键性问题后,以Audi和BMW所使用的通信参数进行每小时通信失效率的计算,结果表明离标准要求很远,加上已发现的FlexRay的其他不安全因素,说明FlexRay要达到其设计目标还有不少工作要做。
FlexRay was designed to satisfy the need of x-by-wire application. It is a time triggered protocol. The most important require- ment is functional safety which is stipulated according international standards IEC61508 and ISO26262. After a brief discussion of main issues of functional safety standard, the communication failure rates per hour are calculated based on the parameters used by Audi and BMW. The results show that the communication failure rate is far higher than the functional safety specification. Besides, there are oth- er safety problems. All these show that more work should be done for b＇lexRay to reach the originally set design target.
出处
《单片机与嵌入式系统应用》
2011年第12期8-11,共4页
Microcontrollers & Embedded Systems
