微小程序段间速度平滑的指数加减速算法设计

Design of Exponential Acceleration and Deceleration Based on Micro-segment

为实现微小程序段间的速度平滑转接,提出基于微小程序段的指数加减速算法。该算法分析了指数加减速数学模型,并根据机床加工的离散周期特征,采用矢量转接算法原理求出机床的进给位移;通过预读转接角度、轮廓误差等数据控制微小程序段间的最大转接速度。实验证明,算法在满足加工精度的前提下,实现了微小程序段间速度平滑过渡,提高了数控加工的速度和效率。

Aiming at making velocity change smoothly,the exponential acceleration and deceleration algorithm on the basis of micro-segments is put forword.The aigorithm analyzes mathematicle model and gets machine＇s moving displacement on the basis of both vector spaces theory and the periodicity of CNC machining.Then the optimal velocities of the linked segments are sought through reading the turning velocity and the contour differences.The experiment demonstrates that the improved exponential acceleration and deceleration algorithm can not only make sure the machining precision but also enhance the speed and efficiency of CNC maching.