测试性分析与评估体系的研究  

Research on testability analysis and evaluation system

作　　者：张伟昆[1] 

机构地区：[1]91872部队

出　　处：《国外电子测量技术》2015年第5期38-42,共5页Foreign Electronic Measurement Technology

摘　　要：测试性是一种能及时准确地确定电子系统状态并隔离其内部故障的设计特性,通过测试性分析与评估来发现电子设备测试性设计中存在的缺陷并加以改进。为了有效评价系统测试性的好坏,迫切需要一个完善的测试性分析与评估体系。通过研究相关矩阵的测试性分析与评估过程,分析并总结得到测试冗余与故障掩盖之间的关系,即可通过简单测试组合减少故障掩盖以此来提高系统的测试性,并对常用测试性参数指标总结并分析提出了2个新的测试指标重点故障检测率与综合故障隔离率。以盒式磁带录放机为例,以不同模型设计两种测试性方案并进行计算分析。其结果表明新提出的测试性指标能够分辨出具有更好测试性的设计方案。System testability is a design characteristic of judging the working state of products and isolating their inside faults exactly .By the method of testability analysis and evaluation we can find the defects in the testability of electronic equipment and improve it .In order to effectively evaluate the testability of a system ,we need to customize some of the measurable indicators .Through research on the process of analysis and evaluate based on the Dependency Matrix ,we analyze and summarize the relationship between the test redundancy and fault masking ,which is fault masking can be reduced through a simple combination of test ,and the testability can be improve by this method .Then we summary and analysis of the parameters of testability to give the Major FDR and Composite FIR .The cassette tape recorder as an example ,design two testability program based on different model to calculation and analysis .The results show that the new testability indicators can distinguish targets with better testability .

关 键 词：测试性分析 相关性矩阵 检测率 隔离率 

分 类 号：TN606[电子电信—电路与系统]