在用复合运动概念分析点的运动时,如何分析点的相对运动,特别是相对运动轨迹,是相对运动分析中的一个难点。本文以平板凸轮机构为例,先介绍错误的分析,然后分析错误的微结所在并具体地阐述相对运动的分析方法。例:偏心轮半径为r,偏心距oc=e以角速度 How to analyze the relative movement of points, especially the relative motion trajectory, is a difficult point in relative motion analysis when analyzing the motion of points with the concept of compound motion. In this paper, flat cam mechanism, for example, first introduced the wrong analysis, and then analyze the error of the micro-knot and specifically explain the relative motion analysis. Example: eccentric radius r, eccentricity oc = e at angular velocity