基础冲击作用下弹性支撑的电磁轴承-柔性转子系统振动特性及瞬态振动主动抑制策略  

Vibration characteristics and active control strategy of an active magnetic bearing‑flexible rotor system with elastic support under impact load

作　　者：张鹏 祝长生[1] 李翁衡 ZHANG Peng;ZHU Chang‑sheng;LI Weng‑heng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《振动工程学报》2024年第9期1513-1522,共10页Journal of Vibration Engineering

基　　金：国家科技重大专项(J2019-Ⅳ-0005-0073);基础科研计划资助项目(2019110C026,ZD-232-02);泰山学者工程项目。

摘　　要：本文将电磁轴承-柔性转子系统安装在弹性支撑的基础上,研究了双半正弦波、半正弦波、正弦波、三角波和双三角波5种冲击激励下弹性支撑基础的振动特性,得到了不同冲击激励参数对弹性支撑基础的加速度的影响规律。为了抑制基础冲击激励条件下弹性支撑的电磁轴承-柔性转子系统的振动,提出了一种基于基础加速度的转子系统瞬态振动补偿控制策略。在设计的电磁轴承-柔性转子系统试验平台上,进行了多种冲击激励条件下弹性支撑基础的振动特性试验,以及安装在弹性支撑基础上的电磁轴承-柔性转子系统的瞬态振动抑制试验。结果表明:冲击激励下,弹性支撑基础的加速度和电磁轴承-柔性转子振动均表现出明显的冲击特征,振动的特性随着冲击激励形式的不同而变化。基于基础加速度的转子系统瞬态振动补偿控制策略能够有效地抑制基础冲击激励对转子振动的影响。Impact load is a common load,but it is also very special.Compared with other persistent loads,impact load has the char⁃acteristics of short duration and large output energy,leading to the transient vibration which may affect the system’s operation safe⁃ty.In this paper,the active magnetic bearing(AMB)⁃flexible rotor was installed on an elastically supported base.The vibration characteristics of the elastic supported base under five types of impact loads,including double half⁃sine wave,half⁃sine wave,sine wave,triangle wave,and double triangle wave,were investigated.The influence of different impact load parameters on the accel⁃eration of the base was obtained.In order to suppress the rotor vibrations,relative to the base induced by impact loads,a transient vibration compensation control strategy based on the base acceleration was derived.The theoretical and experimental results indi⁃cate that the elastic supported base and the AMBs⁃flexible rotor system installed on it both exhibit obvious impact characteristics un⁃der impact loads.These impact characteristics vary with different types of impact loads.The effect of base shock excitations on the rotor vibration can be effectively suppressed by the proposed algorithm.

关 键 词：转子动力学 电磁轴承 振动抑制 基础冲击 前馈补偿 

分 类 号：O347.6[理学—固体力学] TH133.3[理学—力学]