双余度传感器的故障检测与识别

传感器是任何测控系统中不可缺少的部件,也是最容易出故障的环节,传感器故障检测、 识别和信号重构一直得到极大的重视.本文研究了仅利用双余度传感器的输出信号进行故障 检测与识别问题,提出了一个双余度传感器故障信号识别器(FSD),建立了故障信号识别的基 本原理,导出了相应的传感器故障检测与识别的递推算法,并给出了仿真结果.

Fault Detection and Diagnosis for Double Redundant Sensors

Sensors are essential and comparatively fragile units in any measurement and control system. Much attention is alway focused on the fault detection, diagnosis and signal reconstructure of sensors. The problem of failure detection and diagnosis using only the output signals from double redundant sensors is studied in this paper. A model of failure signal diagnosis (FSD) for double redundant sensors is proposed. A fundamental principle of FSD is established, and the correspondent recursive algorithm is presented. Finally, some simulation results are given.