超精密加工轮廓误差的ILC-CCC补偿控制

ILC-CCC Controller of Contour Error Compensating for Ultra-precision Machine Tool

迭代学习控制(ILC)通过对重复运动轨迹的不断学习可提高系统位置跟踪的快速性和跟踪精度,而交叉耦合控制(CCC)通过对轮廓的闭环控制可以有效地减小轮廓误差.在分析双轴数控加工中轴跟踪误差和轮廓误差之间的关系的基础上,提出将ILC与CCC结合构成的ILC-CCC集成控制器引入超精密数控机床的伺服控制.该控制器对被控对象模型有较好的鲁棒性,仿真结果证明算法是可行和有效的.

Iterative learning control （ILC） is an influential control concept that iteratively improves the tracking performance, and cross-coupled control （CCC） has been developed to effectively reduce the contouring error. Based on the relation of tracking and ccintour error in biaxial servo systems, this paper proposes an integrated controller which combines ILC and CCC to achieve ultra-precision. The simulation result indicates that the method can effectively reduce the contour error and tracking error, and possess better robustness.