中文摘要：

以平面直角坐标的齐次坐标变换法为基础,介绍了一种平面剪叉式机构运动学建模方法;运用所得结论,对平面变比例剪叉式机构进行了运动学分析与仿真。文中介绍的平面剪叉式机构运动学模型建立与分析方法,理论清晰、运用简便、通用性强,为对剪叉式机构进行进一步的理论研究和设计制造,提供了依据和基础。

英文摘要：

Based on the coordinate transforming,this paper introduces a way of establishing kinematics model of the plane scieeor-like element（SLE）.And then,it educes the coordinate transforming matrix,and analyzes and simulates the kinematics of plane and proportion-variety SLE.The method introduced in this paper,is convenient for use,clear in theory and a broad applicability.Alao,it provides is a reference for the further research and design of SLE.