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神经网络作为一种模式识别的手段已经成为故障诊断的热门研究课题。本文对目前广泛应用于故障诊断的BP神经网络进行了介绍，并对神经网络在液压泵故障诊断中的应用进行了综述。
As a pattern recognition method, neural network has become a hot research topic in fault diagnosis. This paper introduces the BP neural network which is widely used in fault diagnosis at present, and summarizes the application of neural network in fault diagnosis of hydraulic pump.