基于加权BDD的飞行器多阶段任务系统可靠性分析  

Reliability Analysis of Aircraft Phased-Mission System Based on the Weighted BDD

作　　者：范文亮[1] 张永进[1] 

机构地区：[1]安徽工业大学数理科学与工程学院,安徽马鞍山243002

出　　处：《机械研究与应用》2015年第5期64-68,共5页Mechanical Research & Application

基　　金：国家自然科学基金项目(编号:70971064)

摘　　要：针对不可修的多阶段任务系统可靠性问题,在二元决策图(BDD)方法基础上,提出一种基于加权二值决策图(WBDD)的飞行器飞行任务系统可靠性算法。将飞行器飞行系统视为一个多阶段任务系统,采用任务剖面描述任务时序逻辑关系,考虑系统部件或者产品从完美状态到完全失效的过程中,除了两种状态还存在不完好状态,且能保证阶段的任务完成。利用边扩张构建WBDD,递归遍历WBDD结构,假设部件故障统计独立并计算任务系统的可靠性。通过一个实例,证明此方法的实用性。In terms of reliability problems for the immutable multi-phased mission system, aircraft flight mission reliability a-nalysis model and the algorithm are proposed based on the binary decision diagram （ BDD） method and weighted binary deci-sion diagram （ WBDD） . Regarding aircraft flight system as a multi-stage task system, this mission profile table is adopted to describe the logical relationship of task and order, consider that there is incomplete state in addition to the two kinds of state in the process from the perfect state to complete failure of the system components or products, and guarantee the phase of the task to complete. Weighted binary decision diagram is proposed afterward, and the reliability of task system is calculated with as-sumption that the statistic of components failure is independent. Finally, the effectiveness of the proposed method is verified by a numerical example.

关 键 词：多阶段任务系统 加权的二元决策图(WBDD) 可靠性 

分 类 号：TB114.3[理学—概率论与数理统计]