利用粗糙集理论对决策表进行约简以自动获取过程工业生产系统中的故障知识,从信息熵的角度分析系统知识不确定性的变化,提出了一种基于粗糙集理论的故障诊断新方法,研究了粗糙集理论在故障诊断中的适用性,在前向推理和反向推理的基础上-Some work has been done for dealing with Fault Detection and Diagnosis (FDD) based on Rough Set, but in those cases Rough Set was just regarded as a tool for data cleaning or for assisting of other methods, or for detecting whether a system has fault but usually cannot tell where it happened.To solve this problem, a n