磁悬浮刚性转子系统振动机理分析与动力学建模

Vibration mechanism analysis and dynamic model development of magnetically suspended rigid rotor system

中文关键词  磁悬浮刚性转子  主动振动控制  转子不平衡  磁中心偏心  Sensor Runout

英文关键词  magnetically suspended rigid rotor  active vibration control  rotor unbalance  magnetic center eccentricity  Sensor Runout

中文摘要

      磁悬浮惯性执行机构采用磁轴承支承, 可通过主动控制实现极微振动, 但磁悬浮惯性执行机构仍存在频谱分量丰富的振动. 首先在转子动静不平衡和Sensor Runout振动机理分析的基础上, 重点分析了Magnet Runout产生振动机理; 然后, 建立包含多振动源的系统动力学建模, 并将整个动力学模型分解为平动和转动子系统, 分析表明转子动静不平衡、Sensor Runout和Magnet Runout是通过不同的途径产生振动, 不仅产生同频振动还包含倍频振动; 最后, 提出磁悬浮刚性转子系统主动振动控制的要求, 为以后的主动振动控制研究奠定基础.

英文摘要

      By the virtue of active magnetic bearing, magnetically suspended inertia actuators can make micro-vibration come true through active vibration control. However, there still exist vibrations with some frequencies in magnetically suspended inertia actuators. Firstly, the vibration mechanism of Magnet Runout is analyzed based on the analysis of rotor unbalance and Sensor Runout, then the dynamic model of the magnetically suspended rigid rotor system composing of three vibration sources is developed and divided into translational motion and torsional motion. The analysis dedicates that rotor unbalance, Magnet Runout and Sensor Runout will arise vibrations through different channels, and that the vibrations include the fundamental frequencies and their harmonics. Lastly, the requirements of active vibration control are proposed for the magnetically suspended rigid rotor system, and are useful for the future research.