Abstract: Neural network provides a now and powerful theory method for diagnosis of mechanical system failure, and then it will extricate the diagnosis of mechanical system failure from its present difficult position. In this article, two large parts, the pattern recognition and knowledge processing which aeural network is applied in the diagnosis of mechanical system failure, are discussed in detail. We have prospected for its development, and its forward related research subjects are pointed out.

Key words: 故障诊断, 模式识别, 神经网络