基于多体运动学的测量机几何误差敏感性分析

Sensitivity Analysis of Geometric Error of Measuring Machine Based on the theory of Multi-body System

针对专用双臂螺旋桨测量机的几何误差问题,提出一种基于多体运动学的几何误差敏感性分析方法,来保证专用双臂螺旋桨测量机的空间几何精度。针对专用双臂螺旋桨测量机结构及几何误差关系,建立了考虑运动几何误差的运动学模型。运用多体运动学理论求解相邻体间的特征变换矩阵,根据测量机装配几何误差和运动几何误差建立测量机空间误差模型。通过运动轴几何误差对螺旋桨测量精度的对比验证,结果表明该算法能实现专用双臂螺旋桨测量机的几何误差敏感性分析。

A geometrical error sensitivity analysis method based on the theory of multi-body system is proposed to ensure the geometric accuracy of the special two-arm propeller measuring machine. A kinematic model considering the geometric error of motion is established for the relationship between the structure and geometric error of the special propeller measuring machine. The mult-body system theory is used to solve the feature transformation matrix between adjacent bodies,and the error model is established according to the geometric error and the motion geometry error of the special measuring machine. The results show that the algorithm can realize the geometric error sensitivity analysis of the special two-arm propeller measuring machine by comparing the geometric error of the motion axis with the accuracy of the propeller.