机电设备BIT 中传感层系统的不确定性动态分析􀀂

BIT(Built-in test)系统中传感层的不确定性反映了测试输出数据的可靠度，而数据的可信度影响着BIT系统进行决策的准确性和可信度，并且数据的不确定性是产生虚警的重要因素之一，对传感数据进行不确定性分析是获得数据可信度的有效的量化方法。传统的不确定性分析为静态分析过程，本文基于传感层系统的状态模式空间提出了传感层的不确定性动态分析方法，根据其可靠性模型，基于概率方法进行不确定性的动态计算，实现对传感层系统的执行和输出数据的可信度进行评估。同时对未覆盖故障集合对分析结果的影响进行了分析。最后对某电涡流位移传感器进行了不确定性分析的仿真。

Dynamic Uncertainty Analysis of Sensor Level in Mechatronic Systems For Application of Mechatronics BIT

The uncertainty of sensor level in BIT systems reflects the reliability of detection process and its output data. The reliability of data would impact upon the accuracy and reliability of the decision of BIT systems, and the uncertainty of data increases the false alarm rate of BIT systems. So the uncertainty analysis of sensor level can provide the estimation of the reliability of detection process. The general uncertainty analysis is a static process. In this article, dynamic uncertainty analysis based on the state mode space of sensor system is presented. This analysis method was based on the reliability model of sensor system. And the calculation had a probabilistic foundation. The influence of uncovered fault mode on the method was analyzed. Certain vortex displacement sensor was analyzed as the example to illustrating the method.