某伺服实时控制软件SFMEA/SFTA

SFMEA/SFTA in A Real-Time Servo Control System

对某助推伺服控制软件开展失效模式影响分析(System Failure Mode and Effects Analysis,SFMEA)和故障树分析(Software Failure Tree Analysis,SFTA)。SFMEA是一种自下而上的分析方法,用以辨识出一系列可能的软件潜在故障模式,并评估其对系统工作的危害性。SFTA是一种自上而下的分析方法,其目标是识别出基本事件(底事件),而基本事件可导致系统产生其所不希望发生的顶事件。应用SFMEA和SFTA的主要目的是提高软件和系统的安全性及可靠性。

This paper particularly applies SFMEA and SFTA in a real-time hydraulic servo control software.SFMEA is a bottom-up analysis technique to identify the consequences of possible software failure modes and to evaluate its effects on the operation of the system.SFTA is a top-down analysis technique to identify the contributing elements that could cause the system-level undesired events.The main purpose of the analysis technique above is to improve the safety and reliability of the system.