第二十三讲 功能安全与风险分析

Function Safety and Risk Assessment

功能安全是降低受控设备风险的一种方法。通过危害和风险分析,可以确定所需要的安全功能和对应的SIL等级,使得受控设备的整体风险处于可接受的范围。在SIL等级确定中,本文着重介绍了风险图法和保护层分析两种方法。

Function safety is a mean to reduce the risk of the equipment under control（EUD）.Through hazard and risk assessment,the required safety functions and the safety integrity levels（SILs） can be derived to ensure the EUD is at the tolerable risk level.Risk graph method and Layer of Protection Analysis（LOPA） method are introduced in detail in the paper.