一种降低BIT虚警的优化方法

Optimal method for decreasing false alarm of BIT

针对基于模型的BIT中的虚警问题,首先分析了引发虚警的信息不确定性;之后基于信息不确定性对诊断决策和虚警率的影响关系,将降低虚警的问题转化为一个对信息不确定性的影响具有抑制能力,同时对故障保持高灵敏度的优化问题;最后采用传递函数矩阵内外分解的方法得到了问题的解。

The model based false alarm of BIT is studied. Firstly, the information uncertainty that induces false alarm of BIT is analyzed. Then, based on the influence of information uncertainty on diagnosis decision and fault alarm rate, the problem of decreasing false alarm of BIT is transformed into an optimal problem, its object is restraining the effect of information uncertainty and ensuring the sensitivity to the fault. Finally, the optimal solution is obtained with co inner-outer factorization of transfer function matrix.