测试性建模中故障模式概率更新算法研究

为适应复杂装备全寿命周期内的测试性分析与评估,测试性建模中多采用层次化的建模方式．针对建模过程中信号(功能)概率和故障模式概率的冲突问题,提出了两种故障模式概率更新算法,并通过某装备模块的故障模式概率的更新验证了算法的有效性．提高了测试性分析与评估的精度,为模型的修正和故障诊断策略的生成提供了更加可靠的依据．

Study on correlation algorithm of failure mode rates in testability modeling

To adapt to testability analysis and evaluation of complex equipment in its whole life cycle, hierarchical model is usually adopted in testability model. Aiming at the conflict of failure mode probability and signal (functional) probability, two probability updating algorithms are put forward. Then, the updating process of failure mode probability for testability model of an equipment module is illustrated, which proves that our method is effective and it can increase the accuracy of testability analysis and evaluation, and meanwhile provides more reliable reference for model modification and fault diagnosis strategy generation．