五轴立式精密机床RTCP跟随误差检测优化及补偿

Optimization and compensation of RTCP following error detection for five-axis vertical precision machine tools

基于μ1000/5ST-400V五轴立式精密机床,研究了RTCP跟随误差检测优化及补偿问题。首先,建立了位置误差数学模型,基于齐次变换方式,将旋转坐标转变为机械坐标。其次,通过优化算法,将位置误差转变为空间误差。控制系统更新迭代位置误差中的增益系数,提高了机床的空间误差的检测精确性,通过补偿,提高了机床的精度。最后试验采用S试件切削,切削的结果经过检验机构检测,证明了该方案的可行性。

This article discusses the optimization and compensation of RTCP following error detection based on μ1000/5ST-400V five-axis vertical precision machine tool.A mathematical model of position error is established,under which sufficient conditions for transforming the rotational coordinates into mechanical coordinates are derived under the homogeneous transformation.By optimizing the algorithm,the position error is transformed into the spatial error.The control system updates the gain coefficient in the iterative position error,improves the detection accuracy of the spatial error of the machine tool,and improves the accuracy of the machine tool through compensation.Finally,the test adopts S specimen cutting,and the cutting results are tested,which proves the feasibility of the scheme.