具有粘弹性电磁式主动动力吸振器主动控制试验研究

The Experimental Study on Vibration Control of Viscoelasticity Electromagnetic Active Dynamic Absorber

电磁作动器是吸振器的常见形式,其设计多种多样,本文研制了一种粘弹性电磁式主动动力吸振器,与常见电磁作动器的设计上在电磁铁和永磁铁之间采用弹性元件不同,这种新型作动器在电磁铁和永磁铁之间采用的是粘弹性材料,本文从理论上分析计算了电磁铁和永磁铁之间的作用力,制作了作动器模型,设计了实验,并将此作动器附着于铝质悬臂梁的自由端,利用这种作用力作为控制力对悬臂梁的振动进行控制,证明了此吸振器具有良好的吸振效果。

Electromagnetic absorber is a kind of actuators commonly used in industry and has various forms in design. In traditional design of electromagnet vibration absorber, elastic component is used frequently and placed between the electromagnet and permanent magnet. In this paper a new kind of active vibration absorber is developed. In difference from the commonly adopted design, the proposed absorber uses viscoelasticity material instead of the elastic component. After analyzing and calculating the actuating force between the electromagnet and the magnet, a model of the absorber is made. In order to validate the vibration absorption efficiency of the absorber, an experiment is established, this model is attached at the free end of a thin cantilever which is made of aluminum, the variational actuating force is used as the control force to suppress the vibration of the cantilever. The result of the experiment shows that this new absorber is effective in vibration control.