Research of Direct-drive XY Table Contouring Control Based on NURBS Interpolator
Feedrate fluctuation,chord errors,machining time,machine characteristics,and unreasonable planning may affect machining quality from some extent.Compared with conventional interpolation methods,parametric interpolation method perform better on reducing feedrate fluctuations,chord errors and it can save interpolation time simultaneously.Reasonable feedrate planning and dynamic motion control are also significant for precision improving.In this paper,NURBS interpolation is employed and feedrate is planned on basis of curve geometry and machine dynamic characters.Further more,a model-based disturbance attention control method is adopted in each single axis to reduce the disturbance and friction,besides,CCC combined with PEC control algorithm is applied in biaxial coordination control to improve the contour accuracy.Simulation results demonstrate that the proposed approach can significantly reduce the machining error of XY table.
XY Table Contour Control NURBS Disturbance Attenuation CCC PEC
Limei Wang Rui Liu
School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870
国际会议
the 25th Chinese Control and Decision Conference(第25届中国控制与决策会议)
贵阳
英文
259-264
2013-05-01（万方平台首次上网日期，不代表论文的发表时间）