主動式磁浮軸承應用於轉子偏心力消除系統之研究

Cancellation of Unbalance Force by Active Magnetic Bearing

鍾緯承(Wei-Cheng Chung)

指導教授 ： 范憶華

中原大學/工學院/機械工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200917

摘要

摘要
本研究針對單邊磁浮軸承轉子系統提出了一個可變結構控制器搭配外力估測器，目的為消除震動與質量不平衡。建立一個單邊主動磁浮軸承轉子系統模型，利用可變結構控制之理論設計出控制器，再以估測理論設計偏心外力估測器。
本研究以個人電腦為平台結合Matlab/Simulink搭配A/D-D/A卡提供之xPC-Target工具做系統連結做為回授可變結構控制器和估測器，達到系統即時控制，藉由xPC-Target之優點，我們可以在實驗過程中即時參數修正。其可變結構控制器根據估測出的力量做前饋控制，有效抑制週期性偏心晃動，使系統仍能保持穩定狀態。
由實驗結果顯示，轉子在可變結構控制器加入及未加入偏心外力補償器情況下，實驗圖看出加入偏心外力補償器可以減少轉子與軸承之間的位移量。擷取40Hz與80Hz轉速下，估測偏心外力與實際偏心外力、估測位置與實際位置作比較，可以看出可變結構控制器使用於主動式磁浮軸承基於力量估測器成功建立了轉子系統並具有良好的準確性，並有效改善系統穩定度。

關鍵字

可變結構控制 ； 主動式磁浮軸承

並列摘要

Abstract
This study proposes a variable structure controller with a force estimator for a single active magnetic bearing suspended rotor system to eliminate the vibration associated with unbalance of mass. The model of a single active magnetic bearing suspended rotor system was build and designed a controller via theory of variable structure control. Final, an unbalance force estimator of the system was established via theory of estimate.
This study a PC-based variable structure controller and the feed-forward compensator will catch these signals by AD/DA card calculate by the software of Matlab/Simulink then feed to the rotor system by the real-time control toolbox. Due to the advantage of xPC-Target, in experiment process could modify parameters in time. A variable structure controller was also established according to the estimated force to decrease the influence of the unbalance force and increase the robust of the system.
The experimental results showed that the variable structure controller based on the force estimator could decrease the displacement of the rotor and bearing. In 40Hz and 80Hz rotational speed, compared the estimated unbalance force and displacement with real ones, could obtain the variable structure controller based on the force estimator for a single active magnetic bearing suspended rotor system was established successfully and has good accuracy.

並列關鍵字

variable structure control ； active magnetic bearing

參考文獻

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