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首页> 外文期刊>International Journal of Machine Tools & Manufacture: Design, research and application >Improving contouring accuracy by using generalized cross-coupled control
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Improving contouring accuracy by using generalized cross-coupled control

机译：通过使用广义交叉耦合控制提高轮廓精度

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摘要

Cross-coupled control (CCC) is a well-known approach for directly reducing contour errors on contouring systems instead of the indirect approach of reducing axial following errors. An improvement of this approach, the variable-gain CCC, extends its applicability from just the linear contour to any contour defined by a continuously differentiable function. In this paper, the basic concept underlying CCC is used to develop a generalized CCC (GCCC) approach which can be applied for any free-form contour, including those defined only by a series of (x,y) coordinates similar to the reference inputs to CNC machines. Both computer simulation and actual experimental implementation of GCCC on a small two-axis CNC machine using four contours showed that it can effectively reduce the contour errors resulting from mismatched machine dynamics. For the linear, circular and parabolic contours that CCC can also be applied to, GCCC achieved the same level of contour error reduction. In addition experiments showed that GCCC also achieved similar levels of contour error reductions for free-form contours and for corner tracking. Without the need for a knowledge of the functions of the contours, GCCC is thus most suitable for application to CNC machines in which the contours that are to be generated are defined by a series of reference input axial positions.
机译：交叉耦合控制（CCC）是一种直接减少轮廓系统上轮廓误差的方法，而不是间接减少轴向跟随误差的方法。可变增益CCC是这种方法的改进，将其适用性从仅线性轮廓扩展到了由连续微分函数定义的任何轮廓。在本文中，使用了CCC的基本概念来开发通用CCC（GCCC）方法，该方法可应用于任何自由形式的轮廓，包括仅由类似于参考输入的一系列（x，y）坐标定义的轮廓到CNC机器。在使用四个轮廓的小型两轴CNC机床上进行GCCC的计算机仿真和实际实验均表明，它可以有效地减少由于机床动力学不匹配而引起的轮廓误差。对于也可以应用CCC的线性，圆形和抛物线轮廓，GCCC达到了相同水平的轮廓误差降低。此外，实验表明，对于自由形状的轮廓和拐角跟踪，GCCC还可以实现相似程度的轮廓误差减少。因此，无需了解轮廓的功能，GCCC最适合应用于CNC机械，其中要生成的轮廓由一系列参考输入轴向位置定义。

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