摘要
为实现非圆异形截面零件的加工,结合电磁轴承响应迅速和流体滑动轴承承载力高的特点,提出电磁铁-流体润滑滑动轴承系统,通过主动控制电磁铁输入电流来控制滑动轴承转子的运动轨迹。建立主轴的动力学模型,对耦合的两输入两输出系统进行反馈解耦,设计了鲁棒H∞混合灵敏度控制器。仿真结果表明控制输出能很好地跟踪外部参考信号,并且该控制器对外部干扰有很强的抑制作用,得到比较精确的椭圆轨迹跟踪结果。实验结果验证了仿真结果的正确性。
Based on fast response ability of electromagnetic bearing and high capacity of hydrodynamic lubrication journal bearing,the electromagnetic hydrodynamic lubrication journal bearing that the locus can be shaped through controlling electromagnet current was developed,which can be used for noncircular fine machining.The dynamic model of shaft was established,and the coupled two input and output systems were decoupled by means of states feedback,and the mixed sensitive robust H∞ controller was investigated.Simulation results show that the controlled outputs can track desired inputs accurately and the controller can suppress disturbance effectively.
出处
《润滑与密封》
CAS
CSCD
北大核心
2010年第12期69-73,82,共6页
Lubrication Engineering
基金
国家自然科学基金项目(51075242)
关键词
滑动轴承
轴心轨迹
鲁棒控制
混合灵敏度
sliding bearing
journal locus
robust control
mixed sensitive
