摘要
现有测试性建模方法有一定的约束条件,包括故障判据的一致性、故障传递关系的一致性、测试的逻辑值判据一致性.针对通断式多态系统具有的状态差异性的特点,提出了一种扩展测试性建模方法.在引入状态集合的基础上,对故障、测试、D矩阵和诊断树进行了扩展定义,最后定义了扩展测试性模型.介绍了扩展测试性建模分析的算法,主要有模型建立算法、扩展D矩阵生成算法、扩展诊断树生成算法.以某液压操纵系统为例进行了应用,结果验证了方法的可行性和有效性.
The existing methods for testability-modeling have some constraints, including the consistency of failure criterion, failure transmitting and logical-value criterion of test. Aiming at states differences of on-off multi-state system, the method of extended testability modeling was proposed. Failure, test, D matrix and di- agnostic tree were defined extended with the introduction of states, and an extended testability model was de- fined also. The algorithms for extended testability modeling and analysis were described, which include model- ing, generations of extended D matrix and extended diagnostic tree. A hydraulic control system was taken as an example for the engineering application, which shows that this method is feasible and effective.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2012年第6期772-777,共6页
Journal of Beijing University of Aeronautics and Astronautics
关键词
测试性
测试性建模
通断式多态系统
扩展建模
扩展D矩阵
扩展诊断树
testability
testability modeling
on-off multi-state system
extended modeling
extended D matrix
extended diagnostic tree
