从并联机构与串联机构的运动学等效 ,并联机构本身特征与并联机构实际工作空间出发 ,考虑各分支末端误差对最终运动平台末端误差的影响 ,提出了并联机构位姿误差放大因子分析法·依据位姿误差放大因子具有对误差定量分析的特点 ,该分析方法既可用于机构参数优化 ,又可用于结构精度设计· 最后 ,给出了一个实例说明本方法的有效性· Based on the kinematic equivalence between the parallel mechanism and tandem mechanism, the parallel mechanism itself and the actual working space of the parallel mechanism, considering the influence of the end errors of each branch on the final error of the final moving platform, the pose error amplification factor analysis method of the parallel mechanism was proposed. According to the pose error amplification factor has the characteristics of quantitative analysis of error, this method can be used both for the optimization of the structure parameters and for the design of the structure accuracy. Finally, an example is given to illustrate the effectiveness of the method