摘要
速度控制是提高数控机床加工精度和加工效率的关键技术。常用的速度控制有前加减速控制和后加减速控制,后加减速算法简单,但会产生轨迹偏差,前加减速算法控制准确,不存在轨迹偏差。分析前加减速控制的特点,采用迭代和前向预测的方法设计了前加减速控制算法,针对小线段加工时线段长度过小而无法满足加减速区间长度的问题,设计了拐点速度修正算法和指令速度修正算法。最后在开放式六轴数控系统上实现了前加减速算法,经过加工实验,取得了较好的加减速控制效果。
Speed control is the key technology to improve the precision and efficiency of CNC machine. It is divided into former and posterior acceleration and deceleration control. Posterior acceleration and deceleration control algorithm is simple, but it will bring track error. Former control is accurate, but the algorithm is complex. This paper analyzes the charaeteristics of former acceleration and deceleration control algorithm, and uses the iteration and forecast algorithm to design the speed control. It designs the inflection speed correction algorithm for the problem which the line length is too small to meet the length of acceleration and deceleration. At last, experiment which performed on the CNC system verifies the control results.
出处
《航空计算技术》
2008年第5期29-32,共4页
Aeronautical Computing Technique
关键词
数字控制
速度控制
加减速
小线段加工
numerical speed governing
acceleration and deceleration
micro- segment machining
