基于二态不完全判定表的故障树建模方法  

Method for Fault Tree Construction Based on Incomplete Binary Decision Tables

作　　者：孟庆贺[1] 孙秦[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《吉林大学学报（信息科学版）》2015年第5期601-610,共10页Journal of Jilin University（Information Science Edition）

基　　金：民机专项基金资助项目(NAEK0003)

摘　　要：针对故障树建模中的多态性和判定表约减问题,提出了一种二态不完全判定表法。该方法以事件为条件桩、0,1为条件项的判定表为媒介,列出各种可能的事件序列。在各事件序列条件下,根据部件间的相互作用演绎输出事件;根据工作原理,排除不相关事件和重复事件以简化规则;对相同输出事件的事件序列求并集,确定事件间因果关系。通过对前轮转弯系统故障树建模验证,用这种方法建树的结果与FMEA(Failure Mode and Effects Analysis)及故障手册列出的结果是一致的,而且能有效减小运算规模。A method based on incomplete binary decision tables for fault tree construction is proposed to solve the multi-state problem and the reduction of decision tables. This method starts from the listing of all the possible event sequences by means of decision tables with the condition stub of events and the condition entry of 0 and 1.The output events can be deduced according to interaction of parts under circumstances of different event sequences. On basis of the working principle,the irrelevant and repeated events can be ruled out so as to simplify the rule. And in way of achieving the union sets of the event sequences with the same output events,the causal relationship among events can be achieved. Verified by the fault tree modeling of a nose wheel steering system,the result achieved in this way is consistent with the one in FMEA（ Failure Mode and Effects Analysis）and the fault diagnosis handbook and the scale of calculation can be reduced effectively.

关 键 词：判定表 故障树 功能流 结构函数 故障传播 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置] TB114.3[自动化与计算机技术—控制科学与工程]