介绍了多传感器数据融合的基本概念、主要优点、结构以及它的方法和应用;对故障诊断进行了简要叙述,介绍了故障诊断信息融合过程;分析了多传感器数据融合和故障诊断的特点以及适合于控制系统故障诊断的信息融合的层次结构,并在此基础上提出了一种基于信息融合的故障诊断系统的结构。关　键　词: 　　信息融合; 　控制系统; 　故障诊断Abstract : The basic concept , main advantage , architecture , method and application of multi2sen2 sor data fusion are described. Data fusion is the process of combining , correlating , and associating data f rom multi2sensor or other information sources to identity estimation and assessment of situations. Some general problems on fault diagnosis are int roduced. The process of data fusion of fault diagnosis are also int roduced. Their specialty and the layered fusion architecture fitting with fault diagnosis of cont rol system are analyzed , and an architecture of fault diagnosis which is based on the information fusion are deeply investigated.Key words : 　　Information fusion ; 　Cont rol system ; 　Fault diagnosis