基于多信号流图的电子设备故障传播建模技术研究

Study on Regular of Failure Transmitting Based on Multiple Signal Flow Graph

针对当前缺乏对电子设备故障传播规律研究的现状,将功能参数引入多信号流图模型,根据对功能模块的影响程度,给出了不同的故障类型表达式。引入SI传染病模型,并对其进行改进后应用于电子设备故障传播建模技术,基于多信号流图建立了基本的和带环境因素的故障传播模型,并利用Lyapunov函数证明了故障传播的稳定条件。通过实验仿真得到了与实际贴近的故障传播模型,该模型可有效对复杂电子设备故障发生趋势进行预测,并为后续测试性设计和故障注入技术的研究奠定了理论基础。

In point of the lacking study of the failure transmitting of electronic equipment, the formulas of leading function figure to mul- tiple signal flow graph model. On the basis of the extent to which the function figure influences functions and combined with the similarity be- tween infection and failure transmitting. We improve the SI model and propose the basic transmitting model and the one with environment factor. We get the failure transmit ting~ s trends of development through simulation which is proved to be close fact, and this makes the the- oretica｜ foundation for future optimization of design for testability.