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首页> 外文期刊>Smart Materials & Structures >A current-flowing electromagnetic shunt damper for multi-mode vibration control of cantilever beams
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A current-flowing electromagnetic shunt damper for multi-mode vibration control of cantilever beams

机译：一种用于悬臂梁多模振动控制的电流电磁分流阻尼器

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In this paper, a multi-mode electromagnetic shunt damper employing the current-flowing method is newly developed for the semi-active vibration control of flexible structures. The electromagnetic shunt damper, which is used for the electromagneto-mechanical coupling transduction between vibrating structures and the electrical shunt circuit, consists of a coil and a permanent magnet. The conducting coil is attached to the cantilever beams and the two ends of the coil are connected to the current-flowing shunt circuit for the reduction of vibration. For the analytical and experimental validation of the multi-mode electromagnetic shunt damper, the first two modes of the cantilever beam are semi-actively controlled. In light of the frequency responses, the vibration and damping characteristics of the flexible beams with the electromagnetic shunt damper are investigated with reference to changes in the circuit parameters. Also, the time responses of the integrated systems with an initial condition are experimentally examined for validation of the proposed damper. The effect of the magnetic intensity on the shunt damping is studied by varying the gap between the aluminum beam and the permanent magnet. The theoretical prediction of the frequency response of the electromagneto-mechanically coupled beams shows good agreement with the experimental results. The present results show that the current-flowing electromagnetic shunt damper can be successfully applied to reduce the multi-mode vibration of flexible structures.
机译：本文针对柔性结构的半主动振动控制，新开发了一种采用电流法的多模式电磁分流阻尼器。电磁分流阻尼器由一个线圈和一个永磁体组成，用于在振动结构和分流电路之间进行电磁-机械耦合转换。导电线圈连接到悬臂梁，并且线圈的两端连接到电流分流电路，以减少振动。为了对多模式电磁并联阻尼器进行分析和实验验证，对悬臂梁的前两种模式进行了半主动控制。根据频率响应，结合电路参数的变化，研究了带有电磁并联阻尼器的柔性梁的振动和阻尼特性。此外，通过实验检查了具有初始条件的集成系统的时间响应，以验证所提出的阻尼器。通过改变铝梁和永磁体之间的间隙，研究了磁强度对并联阻尼的影响。电磁力耦合梁频率响应的理论预测与实验结果吻合良好。目前的结果表明，电流流电磁并联阻尼器可以成功地用于减少柔性结构的多模振动。

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