Analysis of open-loop mechanism kinematics accuracy considering elastic deformation

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.