Vibration reduction of H/Shaft using an electromagnetic damper with mode change

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• 作者：K. H. Lee ; J. H. Bak ; J. -L. Park…
• 关键词：Key WordsH/Shaft ; Dynamic damper ; Stiffness ; Natural frequency ; Vibration reduction ; Electromagnetic damper
• 刊名：International Journal of Automotive Technology
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：18
• 期：2
• 页码：255-261
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Automotive Engineering;
• 出版者：The Korean Society of Automotive Engineers
• ISSN：1976-3832
• 卷排序：18

文摘

The objective of this study is to develop a damper that can reduce the amplitude of vibration in various frequency ranges. Previous H/Shaft vibration reduction methods work in a passive way. A dynamic damper reduces the amplitude of vibration at its first mode, but vibration still appears at the second mode. A mass damper or hollow shaft can shift the natural frequency to a lower or higher region. The fixed operating frequency prevents vibration from being reduced outside the operating frequency range. The proposed damper uses electromagnets as either masses or actuators to change the damper mode between dynamic damper mode and mass damper mode. The electromagnetic damper (EMD) can change its mode to respond to the vibration excitation at both low and high frequencies. The vibration reduction performance was evaluated by FRF tests in laboratory and vehicle conditions. The results were compared with those of a dynamic damper and indicate that the amplitude of vibration is reduced by 95.6 % when the EMD is implemented on an H/Shaft, whereas only 61.9 % vibration reduction is achieved by the dynamic damper.