磁流變液(Magnetorheological Fluid，簡稱MR)，當受到外加磁場作用時，其機械性質就會產生改變，而反應過程是一種可逆且易於控制的機制。本文將其MR應用於轉子系統之阻尼器設計上，模擬轉子系統加裝MR阻尼器後轉動時的振動分析，並透過對MR阻尼器電流改變的控制策略，以有效壓制轉子系統在共振轉速時所產生的極大的振動量。由電腦計算並與其他實驗測試分析結果比較顯示，以有之相關實驗研究為例，經由本文所創設之液變阻尼力方法，藉由其簡便之控制方法，經由不同之消能係數與相對應之外加電流，能有效改良轉子系統之最大振幅。由於磁流變液之機械性質在外加磁場的狀況下，經由磁場線圈設計，具有即時且連續可調之特性，因此運用適當之外加電流控制策略，MR阻尼器可於全程轉速區域內，有效抑制轉子系統的旋動。

Magnetorheological fluid (MR) can be changed by the applied magnetic field. The process is reversible and easily controllable. This paper analyzes the vibration of rotor system in rotary process. The analysis is done by simulating the rotor system that is equipped with MR damper and uses the strategy of current changing in the MR damper to suppress the amplitude of resonance frequency. The computer simulation and experiment analysis show that changed damping force by this paper and use
simple controllable policy,use different dissipative coefficient can improve the maximum amplitude of rotor systems.
Because the mechanical property of MR can be quickly changed and adjusted by the application of magnetic field，use advisable current controlled policy by coil design. The MR damper can arrest whirl amplitude for rotor systems .

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