中文摘要：

机械运动中机构运动精度的仿真预测具有重要意义，作为应用广泛且成本低廉的开环机构，在没有反馈信号修正的前提下，如何在考虑经济性的同时兼顾高精度的要求，具有较高的研究价值。在目前广泛应用的方法基础之上，提出一种更为精确的机构运动精度修正方法。即在考虑机构制造误差、运动副间隙等初级误差的基础上，计人重力载荷、惯性力所引起的机构弹性变形位移，理论分析及算例表明，在高精度要求下作此修正是完全必要的。

英文摘要：

The simulation-based prediction of the mechanism kinematics accuracy is of great importance in engineering application. For widely used and low-cost open-loop mechanisms having no feedback signals, it is important to take a balance between economic consideration and high accuracy requirement, thus contains high research value. On the basis of currently wide used methods, this article proposes a more precise method to revise the kinematics accuracy of movement mechanism. Considering the manufacture error and joint clearance in mechanism, the elastic deformation displacement caused by gravity load and inertia force is also reckoned in. Theoretical analysis and case studies show that this amendment for the precision request is absolutely necessary.