CMK61200D×80/32重型卧式车磨数控机床伺服系统

AC servo system for CMK61200D×80/32 heavy horizontal numerical control machine tool

对CMK61200D×80/32L重型卧式车磨数控机床的功能、精度和结构作了简单的介绍,对其伺服驱动系统各部分的功能作了详细的分析,目的在于研究交流伺服系统的扰动抑制问题.利用标准的H∞控制方法设计转速控制器,代替传统的PI控制器,克服了负载扰动等不确定性的影响,保证了系统具有较强的鲁棒性,大大地提高了CMK61200D×80/32L重型卧式车磨数控机床的加工精度.最后采用MATLAB软件对所提出的控制方案进行了仿真研究.仿真结果表明:标准的H∞控制无论是在上升时间、超调量和鲁棒性方面都优于传统的PI控制方案.

The function, precision and structure of CMK61200D ×80/32L heavy horizontal numerical control machine tool are introduced, and the functions of all parts in the system are discussed. A standard H∞ controller substituting PI controller has been proposed. The standard H∞ speed controller can overcome the influences of such uncertainties as parameters perturbation and external load disturbances, and improve both stability and robustness of the system, which enhances machining precision of CMK61200D × 80/32L heavy horizontal numerical control machine tool. The simulation results for the proposed control scheme show that the standard H∞ controller is better than the traditional PI scheme in rising time, overshoot and robustness.