基于多信号流图模型的等效故障注入样本选取

Selection of Equivalent Fault Injection Sample Based on Multi-Signal Flow Graph Model

为了提高测试性故障注入试验的工程实践性,针对选取的故障样本不可注入或注入成本太高的情况,提出了一种基于多信号流图模型的等效故障注入样本选取方法;建立了系统的多信号流图模型,得到了故障-故障关联矩阵和故障-测试关联矩阵,并以提高故障样本注入率为目标,通过结合测试故障子集的概念,提出了等效故障注入样本的定义和选取方法;实例表明,该方法能够有效地提高故障样本的注入率,保证了测试性验证试验的顺利进行。

In order to improve the engineering practicalness of testability fault injection test, a method of selecting equivalent fault injec- tion samples is proposed based on the rnulti-signal flow graph model, aimed at the difficult condition of non injection or highly injecting cost of the selected fault samples. The multi-signal flow graph model of the system is established to obtain failure-testability dependency matrix and failure-failure dependency matrix. Putting forward the definition of the equivalent fault injection sample and general steps of the sample selection, based on the target of improving injection rate of fault samples and combined with the concept of test fault subset. The ex ample shows that this method can effectively improve the injection rate of fault samples and ensure the smooth progress of the testability test.