数控系统S曲线加减速规划研究

Study on S-shape Curve Acceleration and Deceleration Control on NC System

在高速数控加工过程中,为避免机床在启动或停止时出现冲击、超调或振荡等现象,并提高加工效率和精度,提出S曲线加减速规划方法,根据轨迹段的特征,归纳出规划中可能出现的8种S曲线加减速方式。针对每种方式,采用解析式或者迭代法的方法,给出了详细的数学描述,并进行仿真求解。

In the high--speed NC machining process,in order to avoid impact, overshoot and oscillation in the start and stop processes of machine tools,and enhance the machining efficiency and accuracy,an S-shape curve feedrate control method was put forward. According to the characteristics of the trajectory,eight possible diverse methods of the feedrate control were generalized. Aiming at each method,the paper presents specific mathematical description through analytic equation or iteration, simulates and seeks the solution for the feedrate control.