用龙格－库塔法直接解算微分方程，程序中的例子是求解10个线性微分方程组-using the Runge - Kutta method direct solution differential equations, the procedures for example is 10 linear equations

建立了17自由度的铁道车辆微分方程组，用Matlab求出了系统特征值和特征向量，还可用于求系统响应-The differential equations of railway vehicles with 17 degrees of freedom are established, and the system eigenvalues and eigenvectors are obtained by Matlab. It can also be used to find the system re