磁浮軸承轉子系統之模糊偏心補償控制研究

Fuzzy Imbalance Compensation For Single Active Magnetic Bearing Suspended Rotor System

王滄毅(Tsang-Yi Wang)

指導教授 ： 范憶華

中原大學/工學院/機械工程學系/碩士(2006年)

https://doi.org/10.6840/cycu200600662

摘要

本論文為針對主動式單軸磁浮軸承轉子系統進行偏心外力補償之研究，應用模糊控制器的設計，克服偏心外力估測器在變轉速下相角落後的問題，藉此提高偏心外力前饋補償的效能，使得系統在變轉速的運轉下，有效抑制週期性偏心晃動，使系統仍能保持穩定狀態，。
為了消除質量偏心與撓性聯軸器的偏心外力干擾所造成的週期性晃動，本論文提出偏心外力估測器估測外力，並以前饋補償的方式，降低因週期性偏心外力引起的晃動，但是，在變轉速下，此估測器的效能因受到不同轉速下，產生不同相角落後的影響而降低了，經推算得知相角落後與轉速有關，但為了不使轉子系統控制因素太複雜，所以我們利用所獲得的實驗資訊與模糊控制的語意式模糊規則建立一組模糊控制規則，設計出一參數自我調整之模糊偏心前饋補償器，提高偏心外力估測器的性能。
由模擬實驗結果得知，在變加速的過程中，透過參數自我調整之模糊偏心控制器前饋補償的效果比使用單一偏心外力估測前饋補償來的要好，系統的位移偏差降低約為十倍；擷取50Hz與100Hz轉速下，模糊估測偏心外力、估測偏心外力與偏心外力作比較，可知經過參數自我調整之模糊偏心控制器，有效克服相角落後問題，提高前饋補償效能，結果說明本設計能更有效抑制偏心晃動，提高系統穩定性。

關鍵字

模糊偏心補償控制 ； 磁浮軸承

並列摘要

The imbalance compensation for single active magnetic bearing suspended rotor system is investigated in this thesis. We use the fuzzy controller to overcome the problem of phase lag of the force estimator in the different rotating speeds and increase the unbalance feedforward compensation efficiency. It can effectively suppress the imbalance periodic vibration when system work under the variable rotation rate and still enable the system to maintain the stable state.
The force estimator and feedforward compensation method is proposed to eliminate the imbalance periodic vibration of the unbalance mass and the flexible coupling. Because the force estimator has loss effect of phase lag under the variable rotation rate, we establish a set of fuzzy rule by the obtained experimental information and linguistic fuzzy rule of fuzzy logic control in order to reduce the control factor of the rotor system and design the self-tuning fuzzy imbalance compensation. Therefore, we can make the force estimator of feedforward compensation method more efficient.
Experimental results show that the self-tuning fuzzy imbalance compensation is more effective to overcome the imbalance vibration then the unit of imbalance feedforward compensation. The deviation of rotor displacement reduces approximate ten times. From the test datum of 50 Hz to 100 Hz rotation rate, we find the fuzzy estimative imbalance force can overcome the question of phase lag and be effectively than the unit estimative imbalance force. The fuzzy estimative imbalance force compensator can improve the effect of feedforward compensation and the results show the design is more effective to suppress the imbalance shake and improve the steady state vibrations of the system.

並列關鍵字

fuzzy imbalance compensation ； active magnetic bearing

參考文獻

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