The motion models and the corresponding motion equations for pure rotation and pure translation are established respectively . several algorithms are proposed for calculating the pure rotational motion parameters and the pure translation motion ones using correspondence of conic curves respectively 建立了刚体纯旋转运动和纯平移运动模型及其相应的运动方程，提出了计算刚体纯旋转运动和纯平移运动参数的相应算法。
