高响应电磁式刀架非圆截面车削加工的伺服控制研究

Research on Servo Control of High Speed Magnet Tool in Non-Circular Article Machining

分析电磁式微进给伺服系统的开环和闭环数学模型 ,提出在非圆截面零件车削加工中针对给定轨迹渐变的修正迭代学习控制算法。在此基础上 ,对某一中凸变椭圆活塞型线进行了实际跟踪控制试验。结果表明 ,采用电磁式伺服刀架系统及本文提出的控制策略 ,可以满足高速高精度条件下对非圆截面零件的车削加工的要求。

In this paper, the mathematical models of open loop system and feedback closed-loop system of a micro feed servo system using magnet are studied. A novel iterative learning control strategy is proposed, which is applied in the situation of with repeated but slow varying appointed trajectory. Furthermore, a certain piston curve of convex contour and elliptical cross-section with varying ellipticity is used for a tracking experiment test. The results show that by using the magnet servo system and presented control law, the high speed and high accuracy machining is achievable.