| 电磁辅助支承非线性系统的稳定性分析 |
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| 引用本文： | 李慧敏,何勇.电磁辅助支承非线性系统的稳定性分析[J].机械强度,2007,29(5):722-726. |
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| 作者姓名： | 李慧敏 何勇 |
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| 作者单位： | 东华大学,机械工程学院,上海,200051 |
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| 摘 要： | 对电磁执行器直接安装在主支承上的一种新型支承结构--电磁辅助支承系统的稳定性进行研究.首先分析一模拟的单自由度电磁辅助支承系统,建立非线性运动方程,采用相平面法进行分析;然后采用数值分析方法分析多自由度电磁辅助支承系统.分析结果表明, 在电磁执行器作用期间,转子系统处于一种局部稳定状态,其振动不能超过所允许的最大振动值.而该转子系统允许的最大振动值受静态励磁电流Ib的影响较大,受P控制参数的影响较小.
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| 关 键 词： | 电磁执行器 非线性 稳定性 电磁执行器 辅助支承 非线性系统 稳定性 数值分析 MAGNETIC BEARING AUXILIARY NONLINEAR ROTOR SYSTEM ANALYSIS 控制参数 影响 励磁电流 振动值 稳定状态 局部 转子系统 作用 结果 多自由度 方法 |
| 修稿时间： | 2006-05-25 |
STABILITY ANALYSIS OF NONLINEAR ROTOR SYSTEM WITH AUXILIARY MAGNETIC BEARING |
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| LI HuiMin,HE Yong.STABILITY ANALYSIS OF NONLINEAR ROTOR SYSTEM WITH AUXILIARY MAGNETIC BEARING[J].Journal of Mechanical Strength,2007,29(5):722-726. |
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| Authors: | LI HuiMin HE Yong |
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| Affiliation: | Institute of Machinery Engineering, Donghua University, Shanghai 200051, China |
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| Abstract: | The stability research of a rotor system with auxiliary magnetic bearing is presented.At first the auxiliary magnetic bearing is modeled as a single degree of freedom system with nonlinear magnetic force,which is then analyzed qualitatively by the phase plane method.Then a simplified rotor system simply supported on two identical auxiliary magnetic bearings modeled as a MDOF(multiple degree of freedom) nonlinear system is studied by numerical method, together with stability analysis in the Lyapunov sense.The numerical results show that there is maximum allowable vibration of the magnetic core for the active magnetic actuator working in a normal condition.It is also shown that the influence of the static magnetic field actuating current of coil(Ib) on the maximum allowable vibration is much greater than that of the control parameter P. |
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| Keywords: | Active magnetic actuator Nonlinearity Stability |
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