龙门加工中心磁悬浮刚度控制的研究  

Research on the Control of the Magnetic Suspension Stiffness in Gantry Machining Center

作　　者：杨霞[1] 高燕[1] 杨波[1] 杜继光[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110178

出　　处：《组合机床与自动化加工技术》2009年第5期64-67,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：辽宁省教育厅科学研究计划资助(2004D035);沈阳科学技术计划资助(1053125-1-17)

摘　　要：大型龙门加工中心磁悬浮横梁刚度的要求不同于磁悬浮列车及其它磁悬浮装置的要求,针对其特点提出了可以显著降低悬浮磁铁功耗的电磁永磁混合悬浮技术。为了解决电磁铁线圈中的电流变化对总体刚度的影响,采用双闭环控制系统,即在位置环内引入电流环,构成位置电流双闭环系统。根据机床加工过程的特点以及模糊规则等控制器参数选定的繁琐性,设计出符合机床悬浮横梁要求的遗传算法模糊PID控制器。仿真结果表明,将遗传算法引入模糊PID控制器中可以提高悬浮系统的刚度,满足了机床磁悬浮横梁系统的精度要求;同时遗传算法的优化效果十分显著,使得模糊PID控制器各项参数的确定更具有综合性和科学性。The requirement of the stiffness of the magnetic suspension beams in Large Gantry Machining Center is different from that of the magnetic suspension trains and other magnetic suspension devices. According to its characteristics, a kind of suspension technology,which combines the permanent magnet and the electromagnetism together,is presented and could obviously reduce power consumption. In order to solve the impact of the change of current in magnet coils on the overall stiffness, a double closed loop control system, which introduces a current loop into the position loop for forming a position and current double closed loop control system,is adopted. According to the process characteristics of the machine tool and the choice of parameters in the controller as the fuzzy control rules, a genetic algorithm（GA） fuzzy PID controller to meet the requirement of suspended beams on the machine tool is designed. The simulation results show that the fuzzy PID controller using the GA can increase the stiffness of the suspension system to meet the precision requirement of the magnetic suspension beams system on the machine tool. The optimization effect of the GA is very outstanding, which makes the choice of every parameter in fuzzy PID controller more comprehensive and scientific.

关 键 词：磁悬浮移动横梁 模糊PID 遗传算法 MATLAB 

分 类 号：TM921.47[电气工程—电力电子与电力传动]