A statistic method combining principal component analysis(PCA)with joint angle plot was proposed to online detect and diagnose fixed or drift bias of temperature and flow rate sensors of air handling unit(AHU).

• 针对空调箱的温度、流量等传感器进行固定偏差和漂移故障的检测与诊断,提出了一种基于统计学的方法进行在线的故障检测和诊断。