【摘要】 磁悬浮系统是典型的非线性迟滞系统,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,设计出符合机床悬浮横梁要求的模糊PID控制器。通过仿真结果的比较,可以看出采用模糊PID控制器提高了悬浮系统的刚度,能够满足机床磁悬浮横梁系统的精度要求。更多还原

【Abstract】 Magnetic suspension system is a typical non-linear hysteretic system.A kind of technology,which combines the permanent magnet and the electromagnetism,is presented for its characteristics and can obviously reduce power consumption.In order to solve the impact of the change of current in magnet coils on the overall rigidity,a double closed loop control system,which introduces the current loop into the position loop for forming a position and current double closed loop control system,is adopted.A fuzzy PID controller is designed to meet the requirement of suspended beams on the machine tool according to the process characteristics of the machine tool.Comparied with the results of the simulation,it can be shown that fuzzy PID controller improves the stiffness of the suspension system which can meet the precision requirement of the magnetic suspension beams system on the machine tool.更多还原