一个四自由度机械振动系统为例, 利用 Matlab仿真软件对多自由度机械振动系统进行建模及仿真分析.(A mechanical vibration system with four degrees of freedom is taken as an example. Modeling and simulation analysis of the multi degree of freedom mechanical vibration system is carried out by using

FIG simulation speed, distance, amplitude three-dimensional image, For lack of EMD, Wavelet packet analysis to extract vibration signal characteristic frequency.

Wavelet packet analysis to extract vibration signal characteristic frequency, Is a two hidden layer back propagation neural network, Fractal dimension calculation algorithm matlab code blankets.