关键词: 自适应滤波, 人工神经网络, 振动信号

Abstract: Adaptive filter can adapt the change of system and environment，so has higher filtering accuracy.This paper introduces a self-adapting filtering method based on ADALINE neural network to cancel noises，sets up an adaptive filter model according to the principle of adaptive noise cancellation，and uses this method to filter the noise which is excited by the body vibration from the vibration signal of high-pressure line of engine.By this method the signal-to-noise ratio is improved effectively.It contributes to the following signal analysis and fault diagnosis of fuel injector.

Key words: self-adapting filtering, neural network, vibration signal