Based on the study of contour error calculation methods detailed, a novel approach for estimating the contour errors in real-time was proposed for the

requirements of real-time task in high-end CNC.This method solved the problems which, for free-form curve, the contour error calculation process is complex and needs

large computations. Experimental results for a biaxial motion system show that the proposed approach has very small amount of computation and owns very high calculation accuracy in real-time tasks and it can guide the selection of the current control parameters and observe the control effects of the contour errors.

在分析离线轮廓误差计算方法的基础上,针对高档数控系统实时任务的要求,提出了一种在线实时估算轮廓误差的方法。该方法克服了对于任意加工曲线,轮廓误差计算过程复杂、计算量大、难以应用到实时任务的缺点。双轴运动实验证明,该算法计算量极小,能够满足实时计算的要求,估算的轮廓误差具有很高的精度,可以指导当前控制参数的选取并可实时查看轮廓误差的控制效果。

控制精度, 轮廓误差, 实时任务, 双轴运动