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,给出了针对故障点建立决策表以及利用粗糙集约简所获得的诊断规则进行正、反向故障诊断的步骤-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 new approach for FDD based on Rough Set is proposed. The applicabilit