Error Analysis Method and Sensitivity Analysis for Linkage Transmission Mechanism

Given the linkage transmission mechanism with mutual restraint, coupling, and multi constraint conditions, due to the existence of machining errors of parts, the error accumulation in the assembly process leads to the uncertainty of position and posture. At present, there is no quantitative analysis. In this study, the small displacement torsor (SDT)method was used to describe the error variation of geometric elements, and the error transmission attribute of the joint surface was proposed by using a homogeneous transformation matrix. The error accumulation value of each assembly joint surface for the linkage transmission mechanism was analyzed by using MATLAB numerical algorithm, to predict the actual position change value of the frame caused by machining error and the sensitivity of factors affecting the assembly accuracy. The sensitivity can guide for improving assembly accuracy and optimizing technology.