摘要
针对高精度轮廓跟踪需要,将曲线插补和交叉耦合控制器结合起来进行研究。在每个采样周期根据各轴反馈的实际刀具位置与插补缓冲区中存储的一定数量的插补点,研究了一种"三点圆弧法"轮廓误差计算模型,并研究了轮廓误差补偿修正量计算及分配方法。在数控试验台上跟踪一段三次非均匀有理B样条轮廓曲线,对比试验表明,所提出的基于曲线插补的轮廓误差交叉耦合控制方法能够有效减小轮廓误差,获得更高轮廓精度。
Aiming at the tracking demand of high precision contour,the cross-coupled controller integrated with curve interpolation was studied.According to the real cutter positions from each axis feedback and the interpolation dots stored in the interpolation buffer in every sampling period,a ＂three-point arc approach＂ contour error computing model was developed.Moreover,the contour error compensated correction quantity computation and distribution approach was put forward.A cubic Non-Uniform Rational B-Spline Curve（NURBS） profile curve on the numerial control experiment table was tracked.The experiment results showed that the developed contour error cross-coupled control approach based on curve interpolation could effectively reduce contour error and obtain satisfactory contour precision.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2011年第9期1968-1972,共5页
Computer Integrated Manufacturing Systems
基金
国家自然科学基金资助项目(51105236)
山东省优秀中青年科学家科研奖励基金资助项目(BS2011ZZ014)~~
关键词
曲线插补
交叉耦合控制
轮廓误差
补偿修正量
机床
curve interpolation
cross-coupled control
contour error
compensated correction quantity
machinetools
