【摘要】 针对龙门移动式数控加工中心,论文首先提出了将大型移动部件即移动横梁悬浮起来的设想,实现无摩擦高精度快速定位。然后针对扰动设计了可以提高电磁悬浮气隙高度之刚度的H∞鲁棒控制器。该种方法易于工程实现和构成闭环系统。仿真结果表明,这种控制方案有较好的动态、静态特性及鲁棒性,满足对悬浮高度之高刚度的性能要求。更多还原

【Abstract】 Aiming at gantry-moving machining centre,a suggestion to suspend large-scale movable component,namely movable bridging beam,has been put forward firstly to realize high accurate orientation without friction in this paper.Then we designed a H∞ robust controller to improve the rigidity of electromagnetic suspension air-gap.This control method can be realized in engineering conveniently and its close-loop system also can be constituted easily.The simulation result shows that this control method has better dynamic and static performance and robustness,and meets the requirement on high accurate rigidity of electromagnetic suspension height.更多还原