容错软件可靠性故障树分析方法

Fault Tree Analysis of Fault Tolerant Software Reliability

在关键的场合,要求使用容错软件技术(包括非相似设计技术和恢复块技术)实现高可靠计算机系统。对一个计算机系统的可靠性分析可以使用各种技术,而故障树方法是在工程上比较常用的一种技术。故障树技术应用于硬件系统是比较成熟的,而这里针对三余度非相似余度计算机,将故障树技术应用在这个系统上,并给出了最小割集,在每个底事件的可靠性评估之后,就可以评估出整个非相似余度计算机系统的可靠性。

Fault Tolerant software techniques such as Nversion programming (NVP) and Recovery Block (RB) are introduced into the ultrahigh reliable critical computer system. Fault tree is one of methods used for analyzing the reliability of the computer system. This paper presents the fault tree analysis method for the triple dissimilar redundant computer in detail and the minimum cutest. Based on the calculation of the bottom event, the reliability of the dissimilar redundant computer system can be evaluated. 