基于主元分析的传感器故障检测方法中,SPE和H aw k in T2H是两个重要指标,针对目前应用中SPE指标有不足,而H aw k ins T2H指标一直没有得到重视的问题,该文通过分析对比SPE和T2H指标的控制限和基于主元分析的传感器故障可检测性的充分条件,得出了SPE和T2H指标的可检测故障幅值计算公式。定性分析了SPE和T2H指标对不同传感器故障具有不同的检测能力,并通过数值仿真进行了验证。指出由于T2H和SPE指标各有优劣,因此在实际传感器故障检测中应该联合使用。 In the sensor fault detection method based on principal component analysis, SPE and H aw k in T2H are two important indexes. In view of the lack of SPE index in current application and the fact that H aw k ins T2H index has not been taken seriously, By analyzing the control limits of SPE and T2H indices and the sufficient conditions for the detection of sensor faults based on principal component analysis, the formulas for calculating the detectable fault amplitudes of SPE and T2H indicators are obtained. Qualitative analysis of SPE and T2H indicators of different sensor fault detection ability has different, and verified by numerical simulation. It is pointed out that because T2H and SPE have their own advantages and disadvantages, they should be used together in actual sensor fault detection.