摘要
为了实现高速加工中进给速度的高速衔接,避免因加速度突变导致对数控设备的冲击,提出了一种基于插补前S曲线加减速的前瞻自适应速度优化算法。该算法能够根据加工段的过渡情况自动调节预读段数。以进给速度最大化为目标,在预读段衔接进给速度限制和加工过程平滑减速的约束条件下,根据离散化S曲线加减速规律求解最优衔接进给速度。将求得的最优衔接进给速度作为相应加工段的实际末速度,来实现加工段的速度控制。给出了该算法在高速数控系统中的实现方法,并在管切割数控系统中得到了应用。实验结果表明,该算法能够实现进给速度的高速、平滑衔接,满足高速加工的要求。
To realize high-speed feedrate linking for high speed machining,and to avoid the impact of Computer Numerical Control（CNC）equipments caused by acceleration gust,a look-ahead and adaptive speed optimization algorithm based on pre-interpolation S-curve acceleration and deceleration was proposed.According to the transitions of the machining segments,the algorithm could automatically adjust the numbers of the preprocessing segments.With two constraints,the linking feedrate limitations of the preprocessing segments and the smooth deceleration of the machining process,the optimal linking feedrate was sought to achieve the maximum feedrate based on the discrete S-curve acceleration and deceleration.The obtained optimal linking federate acted as the actual ending velocity of the corresponding machining segment,speed control of the segment could be realized.The implementation of the algorithm for high speed equipments was given,and the algorithm was applied in pipe cutting CNC system.Experimental results showed that the proposed algorithm could realize high-speed and smooth transitions while satisfying high-machining requirements.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2010年第5期998-1005,共8页
Computer Integrated Manufacturing Systems
基金
国家863计划资助项目(2006AA01Z126)~~
关键词
S曲线加减速
前瞻自适应速度优化
衔接进给速度
高速加工
数控系统
S-curve acceleration and deceleration
look-ahead and adaptive speed optimization
linked feedrate
high speed machining
computer numerical control
