光学精密工程2011，Vol.19Issue(5)：1048-1053,6.DOI:10.3788/OPE.20111905.1048
2X/Y直线进给轴直线轮廓误差的学习补偿方法
Learning-based linear contour error compensation method for 2X/Y-type linear feed axes
摘要
Abstract
To improve the linear contour accuracy of 2X/Y gantry linear feed axes, the research of the literature focuses on the straightness accuracy measurement, evaluation and error compensation of the axes. Firstly, the cause of linear contour error in interpolation process and its compensation complexity were analyzed for a 2X/Y gantry feed axis driven by linear motors. Then a learning algorithm based compensation method was applied to increase the contour accuracy for this type of gantry axis. In the method, 2D time function of a laser interferometer was utilized to acquire real-time interpolation error data and least square method was taken to evaluate and determine the ideal linear equation. A model based on least square support vector regression technique was established to recognize the errors.With the support vectors from learning process, the real-time compensation values were acquired through the model regression calculation. Finally, the compensation output strategy and corresponding realization system were also proposed. To demonstrate the procedure of the proposed approach, an experiment was conducted on the self-construction 2X/Y axis feeding platform. The result shows that the combination technique can compensate the interpolation error and increase the straightness accuracy by 53％.关键词
数控机床/直线进给轴/直线度误差/在线补偿/支持向量回归Key words
numerical control machine / linear feed axis/ straightness error / on-line compensation/ support vector regression分类
矿业与冶金引用本文复制引用
林献坤,于垂顺,李郝林..2X/Y直线进给轴直线轮廓误差的学习补偿方法[J].光学精密工程,2011,19(5):1048-1053,6.基金项目
国家自然科学基金资助项目(No.51005158) （No.51005158）
上海市科学技术委员会基金资助项目(No.08110511800) （No.08110511800）
