基于多信号模型的现场可更换模块测试性建模与分析

Testability Modeling and Analysis Based on the Multi-signal Model for LRM

摘要:

基于多信号模型的测试性建模与分析为测试性设计提供了一条崭新的思路,但测试性建模过程所需的测试性信息却难以准确、完备地获取,进而使测试性建模过程变得非常困难,指出正确获取测试性信息的关键是要消除产品设计人员和建模人员之间存在的知识隔层；分析了多信号模型的8个要素,结合工程实践给出了测试性信息的获取方法和测试性建模的工程化操作流程,工程化操作流程包括:确定结构层次、故障模式影响分析、信号流分析、测试分析共4个步骤；以某现场可更换模块为例,完成了测试性建模与分析；结果表明,给出的测试性信息获取方法和工程化操作流程在实际工作中是可行的、有效的；测试性建模、分析的结果能够在设计阶段较准确的评估测试性设计是否满足既定的指标,并为测试性设计的进一步改进指明方向。

Abstract:

Testability modeling and analysis based on the multi-signal model provides a new way for testability design, however, testability information needed in the process of testability modeling can’t be obtained correctly and completely, which blocks the process of testability modeling seriously, points out that eliminating the obstacle between the product designer and modeling designer is critical for obtaining the testability information correctly. Analysis eight elements of multi-signal model, provides a new way for obtaining testability information and the engineering operation flow based on engineering practice,the flow includes 4 proceeds:identify the hierarchical structure, failure mode and effects analysis, signal-flow analysis, test analysis. Take a line replaceable unit as example, the testability modeling and analysis work finished, the result shows that the way obtaining the testability information and the engineering operation flow is feasible and effective. The result of testability modeling and analysis can estimate correctly whether the testability design is satisfied with the target in the design phase, and points out the direction for improvement. 