本文目的在討論基於磁流變阻尼器之控制器研發，本論文使用磁流變阻尼器(magnetorheological damper)作為隔震系統中的減震裝置，隔震系統常見於地震與土木工程研究領域，磁流變阻尼器是一利用磁流變液(magnetorheological fluid)通電後，流體會產生流變效應而製成的阻尼裝置，廣泛地應用在基底隔震、土木工程以及機械工程系統中，藉由外加磁場的大小使得磁流變阻尼器成為一種可控制、可調變的智能阻尼裝置，然而磁流變阻尼器內部的非線性磁滯動態使得在系統建模與控制設計上十分不易。
相較於文獻中之Bouc-Wen模型存在非連續、片段、非確定型函數，限縮了分析與控制方法發展。本論文使用一創新、連續且動態確定之類Duffing 方程式，來識別磁流變阻尼器的磁滯動態行為，以建立一確定性且系統化的模型，並基於此模型進行後續最佳化參數識別、穩定度分析、半主動控制方法研發與減震實務驗證，以期能確實掌握磁流變阻尼器之輸出響應，且有效控制之。
在最後模擬與實驗中，類Duffing模型將會與文獻中之Bouc-Wen模型互相分析與比較，以驗證類Duffing模型之效果與準確度，並比較Bouc-Wen模型與類Duffing模型在結構物減震中之模擬與實驗結果，驗證兩者皆能有效的達到結構物減震目標。

The purpose of this study is about Control Development of Magnetorheological Damper Using Duffing-like Model. Semi-active control of magnetorheological (MR) dampers for vibration reduction of structural systems has received considerable attention in civil and earthquake engineering, because the effective stiffness and damping properties of MR fluid can change in a very short time in reaction to external loading, requiring only a low level of power. However, the inherent nonlinear dynamics of hysteresis raise challenges in the modeling and control processes.
The Bouc-Wen model in the literature has complex mathematical equations including discontinuous, nondeterministic, and piecewise functions render the system identification, stability analysis, and control design processes to be difficult. In order to control the MR damper, an innovative Duffing-like equation is proposed to approximate the hysteresis dynamics in a deterministic and systematic manner than previously has been possible.
In the result of simulation and experiment, the comparison between the Bouc-Wen model and Duffing-like model will be shown to verify the purpose for vibration reduction of structural systems.

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