近來有關主動式磁浮軸承的研究已被廣泛的應用於現代工業中，由於磁浮技術無接觸的特點，避免物理上的摩擦與磨耗，在諸如工程工業、生物醫學上皆有其應用，例如渦輪發動機[1]、真空泵 [2]、高速主軸[3]等。
旋轉機械的轉子質量不平衡會引起系統劇烈振動，由於轉子偏心所引起的同步振動是磁浮軸承在高速運轉的主要激震源，當轉速到達一定程度時，離心力會使軸承振動量超過氣隙大小，轉子與緊急軸承會產生摩擦碰撞。
本論文旨在開發以數位處理器為基礎的主動式磁浮軸承不平衡補償控制系統，首先，利用電感式位移感測器與PD控制法將磁浮軸承浮起並且運轉，當運轉至某頻率時導入通用型陷波濾波器將該轉速下之不平衡量消除，實現主動式磁浮軸承自動平衡控制。

Recently, research of active magnetic bearings has been widely applied in industry. It’s non-contact characteristic of magnetic levitation technology without physical friction and abrasion. Therefore, active magnetic bearings have been widely implemented, such as engineering industry and biomedical application. For example, turbine engine [1], vacuum pump[2], high-speed spindle[3], and so on.
Rotating mechanical umbalance causes severe system vibration. The synchronous vibration caused by eccentricity of the rotor is the major excitation source, when rotating at high speed. As the operating speed increases to certain speed, the centrifugal force makes the bearing vibrate larger than the size of air gap, the rotor and the emergency bearing will collide with each other.
This paper aims to develop unbalanced compensation of active magnetic bearings base on a digital processor. First, inductive displacement sensors and PD controller are used to levitate the maglev bearing. A generalized notch filter is used to eliminate the synchronous unbalance operating and implement the auto-balancing control of the active magnetic bearing, when the magnetic bearings are operated to certain speed.

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