CNC系统中几种升降速控制曲线的研究与比较

Research and Comparison for Several Curves of Acceleration and Deceleration in CNC Systems

运动过程的升降速控制是CNC(Com puter num ericalcontrol)系统开发中的关键技术难题之一。文中在分别分析了数控系统中梯形、S型和直线加抛物型升降速曲线的基础上,对这几种控制方法各自的优缺点及适用场合进行了比较,并着重讨论了速度时间曲线是直线加抛物型的升降速曲线在由步进电机驱动的经济型数控系统中的应用,实验证明。

Control of the process of acceleration and deceleration is one of key complicated problems in CNC system development. On the basis of analysing trapezoidal, S curve and parabolic profile motions in numerical control systems, this paper compares their advantages and disadvantages, obtains the adaptable occasions, especially emphasises on a new parabolic V T curse algorithm of the acceleration and the deceleration available for economic numerical control systems. And it can greatly improve characteristics of this kind of numerical control systems.