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设计了信号故障传播率的计算方法,在此基础上设计了根据信号故障传播率进行故障注入实验,并根据故障注入实验的结果绘制错误传播图的方法.根据实验结果和错误传播图可以从信号和模块两个层次对系统进行分析,找出最为脆弱的部分,即找出最可能传播故障的信号和模块,以及最可能传播故障的一条路径.据此可对系统的可靠性做出评测.工作在高辐射环境下的各类软件系统,如星载系统,在运行过程中可能会因环境的扰动发生SEU现象,本文利用软件故障注入技术对这种现象进行模拟,进行故障注入实验,实验结果表明我们设计的算法能有效地对系统的可靠性做出评测.
Based on this, a fault injection experiment is designed according to the signal propagation rate, and the method of fault propagation is drawn according to the result of fault injection experiment.According to the experimental results and error propagation diagram, And the module two levels of analysis of the system to identify the most vulnerable part of the signal to find the most likely to spread the fault and the module, and the most likely to spread a path of failure, which can make the system reliability assessment. All kinds of software systems operating under high radiation environment, such as spaceborne systems, may experience SEU phenomenon during the operation due to environmental disturbance. This paper uses software fault injection technology to simulate this phenomenon, and conducts fault injection experiments and experiments The results show that the algorithm we designed can effectively evaluate the reliability of the system.