不平衡識別應用於磁浮軸承自動平衡控制

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/75077

Title:	不平衡識別應用於磁浮軸承自動平衡控制
Authors:	楊政倫;Yang, Cheng-Lun
Contributors:	機械工程學系
Keywords:	磁浮軸承;不平衡識別;自動平衡;Magnetic bearing;Unbalance identification;Automatic balance
Date:	2017-08-14
Issue Date:	2017-10-27 16:18:54 (UTC+8)
Publisher:	國立中央大學
Abstract:	工業對於效率、精度的要求日益提升。針對高速運轉的機構部件而言，磁浮軸承的開發成為必然的趨勢。其相較於傳統接觸式軸承而言，不會因為接觸之摩擦造成轉子與軸承間的能量損耗及溫度增加，不僅僅大幅提高機構壽命，並且對於高轉速的負荷程度更是遠高於傳統軸承。然轉子不平衡引起的振動為磁浮軸承運轉時會遇到的情形，透過一種基於不平衡識別的磁浮軸承轉子系統自動平衡法，對於不平衡干擾有顯著之抑制作用。該法不需要受控體的轉移函數，也不影響控制系統之穩定度，透過對磁浮軸承施加試探激振訊號，並檢測控制訊號解調後之振幅與相位變化，識別出不平衡干擾訊號的Fourier系數，經由計算以產生精確的補償訊號，使轉子繞質心旋轉，提高運轉穩定及效率。 ;Industry for efficiency, accuracy requirements are increasing. For the high-speed operation mechanism, the development of magnetic bearing become an irreplaceable trend. Compared with traditional bearing, the friction between the rotor and the bearing is almost zero, won’t cause energy loss and temperature increase, not only greatly improve the life of the machine, and for the speed limit is higher than the traditional bearing. The vibration caused by the unbalance of the rotor is the main excitation source of the high speed operation of the magnetic bearing. Through the automatic balance method of the rotor system of the magnetic bearing based on the unbalance identification, it has a significant inhibitory effect on the unbalanced interference. The method doesn’t need the transfer function of the object and doesn’t affect the stability of the control system. The Fourier coefficient of the unbalanced jamming signal is identified by applying the test excitation signal to the magnetic bearing on-line and detecting the amplitude and phase change of the control current response. To produce accurate compensation signal, improving the operation of stability and efficiency.
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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