包括最小二乘法、SVM、神经网络、1_k近邻法,小波包分析提取振动信号中的特征频率，利用最小二乘算法实现对三维平面的拟合。- Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Wavelet packet analysis to extract vibration signal characteristic freque