摘要
基础构件转动的机构是火炮上的一种新机构。根据达朗贝尔原理和虚位移原理，本文推导了这种新型机构在工作构件影响下的运动微分方程，可以用来解决这类机构的运动学和动力学问题。
A kinematic equation of a new type of automatic mechanism is derived in this paper on basis of d'Alembert's Principle and principle of virtual work.It is used to solve the problems of kinematics and dynamics.
