Magnetic Bearing Stiffness Control Using Frequency Band Filtering
نویسنده
چکیده
Active magnetic bearings can be implemented with frequency band-reject filtering that decreases the bearing stiffness and damping at a small bandwidth around a chosen frequency. The control scheme has been used for reducing a rotor dynamic force, such as an imbalance force, transmitted to the bearing stator. This study reveals that the scheme creates additional system vibration modes at the same frequency. It also shows that the amount of force reduction is limited by the stability requirement of these modes.
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