LOOK-AHEAD ALGORITHM FOR VELOCITY CONTROL BASED ON PARAMETERIZED CURVE INTERPOLATOR  

作　　者：REN Kun FU Jianzhong CHEN Zichen 

机构地区：[1]College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China

出　　处：《Chinese Journal of Mechanical Engineering》2008年第2期23-26,共4页中国机械工程学报（英文版）

基　　金：Special Project for Key Mechatronic Equipment of Zhejiang Province,China (No.2006Cl1067);Science & Technology Project of Zhejiang Province,China (No. 2005E10049)

摘　　要：To avoid suffering gouge and transient overshooting in high speed cutting machining, a novel parametefized curve interpolator model with velocity look-ahead algorithm is proposed. Based on a prearrangement step interpolation algorithm for parameterized curves and considering high curvature points, parameterized curve tool path is divided into acceleration segments and deceleration segments by look-ahead algorithm. Under condition of characteristics of acceleration and deceleration stored in control system, deceleration before high curvature points and acceleration after high curvature points are realized in real-time in high speed cutting machining. Based on new parameterized curve interpolator model with velocity look-ahead algorithm, a real cubic spline is machined simulativly. The simulation results show that velocity look-ahead algorithm improves velocity changing more smoothly.To avoid suffering gouge and transient overshooting in high speed cutting machining, a novel parametefized curve interpolator model with velocity look-ahead algorithm is proposed. Based on a prearrangement step interpolation algorithm for parameterized curves and considering high curvature points, parameterized curve tool path is divided into acceleration segments and deceleration segments by look-ahead algorithm. Under condition of characteristics of acceleration and deceleration stored in control system, deceleration before high curvature points and acceleration after high curvature points are realized in real-time in high speed cutting machining. Based on new parameterized curve interpolator model with velocity look-ahead algorithm, a real cubic spline is machined simulativly. The simulation results show that velocity look-ahead algorithm improves velocity changing more smoothly.

关 键 词：High speed cutting machining Parameterized curve interpolator Look-ahead algorithm 

分 类 号：TH6[机械工程—机械制造及自动化]