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针对BP神经网络存在局部极小值和收敛速度慢等问题,文章提出了一种PCA-改进的BP神经网络的方法。实验表明,基于PCA-改进的BP神经网络的方法可以大大提高故障诊断的准确性,缩短了诊断时间。
Aiming at the problems of local minima and slow convergence rate of BP neural network, this paper presents a new method of PCA-BP neural network. Experiments show that the method based on PCA-improved BP neural network can greatly improve the accuracy of fault diagnosis and shorten the diagnosis time.