论文部分内容阅读
本文主要研究数控加工刀具运动的优化控制,分别针对加工曲线为折线、直线和圆弧的情况,基于插补的思想,分别建立了在折线夹角处采用加加速有界的速度规划算法,直线插补和圆弧插补实时加工优化控制算法,并得到了折线夹角角度与折线交点速度变化的数学关系式,并以相邻两折线段夹角分别为90°和135°时为例,计算出通过折线交点时坐标的开始运动速度与结束运动速度相同。此外结果显示,对于加工曲线为圆弧的情况,半径越大误差越小,算法效率越高。此外,根据上述优化控制算法,对加工示例进行检验可知,该方法能保证速度以及加速度的连续,有效提高了系统的柔性,同时对算法进行了较大程度的简化。
In this paper, we mainly study the optimal control of NC machining tool movement. According to the interpolation curves, we design the speed planning algorithm of accelerating bounded corner at the corner of the line, Interpolation and arc interpolation real-time processing optimization control algorithm, and get the mathematical relationship between the angle of the included angle and the intersection point of the fold line. Taking the angle between adjacent two broken line segments as 90 ° and 135 ° as an example, It is calculated that the start movement speed and the end movement speed of the coordinates at the intersection of the polyline are the same. In addition, the result shows that the larger the radius is, the smaller the error is and the higher the efficiency is. In addition, according to the optimization control algorithm mentioned above, the processing example is tested. It can be seen that the method can ensure the continuous speed and acceleration, effectively improve the system flexibility, and simplify the algorithm to a large extent.