This is called a normal system of differential equations. 這稱(chēng)為正規微分方程組。
The dynamical equations of rigid flexible coupling multibody systems have characters of stiffness and high frequency oscillation. 剛柔耦合多體機械系統動(dòng)力學(xué)微分方程組具有剛性和高頻振蕩的特點(diǎn)。