TRAJECTORY GENERATION AND CONTROL FOR NON-CIRCULAR CNC TURNING  

作　　者：JIANG Simin YAN Han WANG Xiankui 

机构地区：[1]Douglas Machine Inc.,Alexandria MN 56308, USA [2]Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Journal of Mechanical Engineering》2008年第5期23-28,共6页中国机械工程学报（英文版）

基　　金：the Tenth Five-Year National Science and Technology Key Project of China(No.BA203B04).

摘　　要：A trajectory generation method which is based on NURBS interpolation is studied to improve the fitting accuracy and smoothness of non-circular cross section and obtain higher accuracy of the final non-circular profile control. After using the NURBS, the most optimized and smooth trajectory for the linear actuator can be obtained. For the purpose of machining the non-circular cross section by CNC turning, the fast response linear actuator has been used. The control algorithm which is compound control of proportional-integral-differential （PID） and iterative learning control has been developed for non-circular profile generation. By using the NURBS interpolation and the compound control of PID and iterative learning control, the final motion accuracy of linear actuator has been improved, therefore, the machining accuracy of the non-circular turning can be improved.A trajectory generation method which is based on NURBS interpolation is studied to improve the fitting accuracy and smoothness of non-circular cross section and obtain higher accuracy of the final non-circular profile control. After using the NURBS, the most optimized and smooth trajectory for the linear actuator can be obtained. For the purpose of machining the non-circular cross section by CNC turning, the fast response linear actuator has been used. The control algorithm which is compound control of proportional-integral-differential （PID） and iterative learning control has been developed for non-circular profile generation. By using the NURBS interpolation and the compound control of PID and iterative learning control, the final motion accuracy of linear actuator has been improved, therefore, the machining accuracy of the non-circular turning can be improved.

关 键 词：Trajectory generation Iterative learning control Non-circular turning 

分 类 号：U213.2[交通运输工程—道路与铁道工程]