CAJ | 학술논문

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。
침대불가수적다계단임무계통가고성문제,재이원결책도( BDD)방법기출상,제출일충기우가권이치결책도( WBDD)적비행기비행임무계통가고성산법。장비행기비행계통시위일개다계단임무계통,채용임무부면묘술임무시서라집관계,고필계통부건혹자산품종완미상태도완전실효적과정중,제료량충상태환존재불완호상태,차능보증계단적임무완성。이용변확장구건WBDD,체귀편력WBDD결구,가설부건고장통계독립병계산임무계통적가고성。통과일개실례,증명차방법적실용성。
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.