传感层反馈型机内测试系统模型分析和验证  

Model Analysis and Validation of Sensor Level Feedback Built-in Test Systems

作　　者：刘冠军[1] 杨光[2] 邱静[1] 吴晓艳 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073 [2]空军装备研究院雷达所环境与可靠性试验中心,北京100085 [3]新乡航空中心修理厂,河南新乡4530000

出　　处：《测试技术学报》2007年第3期189-194,共6页Journal of Test and Measurement Technology

摘　　要：虚警率较高是制约机内测试(Built-in Test,BIT)技术发展与应用的关键问题之一.为降低虚警率,从BIT系统的信息处理流程和虚警率的数学模型两方面分析了传感层不确定性对虚警率的影响,阐述了基于传感器系统可靠性模型的传感层动态不确定性分析和计算方法;在BIT系统中嵌入传感数据证实模块,提出了传感层反馈型BIT系统模型;对新模型和原模型的输出数据不确定性及虚警率进行了分析和验证.结果表明:传感层反馈型BIT系统模型可以有效降低传感层输出数据的不确定性和虚警率.High False Alarm Rate （FAR） in Built-in Test （ BIT ） systems is one of the key problems to prevent BIT from developing. In order to decrease FAR, the influence of sensor measurement uncertainty on FAR is analyzed through the information processing flow and the mathematical model of FAR in BIT systems. Then, the algorithm of evaluating measurement uncertainty is expounded based on the reliability model of sensor systems. A feedback BIT processing model of sensor levels is proposed by embedding the sensor validation module. Finally, the output data uncertainty and FAR of the sensor level feedback BIT processing model are analyzed and validated. The results show that the sensor level feedback BIT processing model can decrease the uncertainty of output data and FAR effectively.

关 键 词：机内测试 传感层 不确定性 虚警率 

分 类 号：TH165.3[机械工程—机械制造及自动化]