The meshing equation and the formula of meshing efficiency are drawn by using active coordinate and rotating matrix operators.
运用活动标架和回转运动群对其啮合方程和啮合效率进行了分析研究；
The governing equation of a gear system with time-varying meshing stiffness is established.
建立了具有时变啮合刚度的二级齿轮系统的动力学方程式。
Because of the meshing stiffness of a gear pair, the governing equation denotes a linear dynamic system with periodic time-varying coefficient.
由于齿轮副啮合刚度的影响，动力学方程序代表了一个具有时变系数的线性动力系统。
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