【摘要】 在基于主元分析的传感器故障检测方法中,Hawk insT2H指标对部分传感器故障的检测优于常用的SPE指标。但目前对T2H指标的研究并不充分,尚需要对T2H指标进行故障重构能力的分析。利用几何投影的概念,研究了T2H指标的传感器故障重构问题,并得出了该指标的故障可重构条件。应用数据仿真实验验证了T2H指标的传感器故障重构计算方法的有效性。更多还原

【Abstract】 In fault detection methods based on principal component analysis(PCA).Hawkins’ T~2_H is more sensible to detect fault for partial sensors than square prediction error(SPE).Because the research on T~2_H is inefficiently,it is necessary to analyze T~2_H’s reconstructbility.Reconstruct formula is derived from geometric projection,and the reconstructbility is given accordingly.A simulated data model is used to verify T~2_H’s reconstruction formula.更多还原