航电处理机相关性建模与故障方程生成方法

Dependency Modeling and Fault Equation Generation for Avionic Processors

航电产品的相关性建模方法为验证故障检测/隔离能力、提高产品的测试性提供了实用方法,由相关性模型生成的故障方程能够有效地进行故障诊断。针对工程实际需求,介绍了一阶相关性模型的数据获取及模型建立方法。利用测试性建模软件建立了某型航电处理机的一阶相关性模型,并获得了相应的测试性参数及系统D矩阵。同时,探讨了由一阶相关性模型生成系统故障方程的方法,包括D矩阵压缩方法和故障方程逻辑合成两个步骤。

Dependency modeling is a practical way of verifying the ability of fault detection/isolation and increasing system testability for avionic products.The fault equations derived from the dependency model can also be effectively performed in fault diagnosis.The data acquisition and model realization methods are introduced,and the testability modeling tools are used to establish the first-order dependency model of a real avionic processor.The testability indices and the system D-matrix are gained.Additionally,fault equation generation methods based on the dependency model are discussed,including two steps：D-matrix compression and equation logics combination.