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Bending vibration control of a MR fluid embedded smart beam exposed by the conjunction of wind-induced galloping effects
Smart Materials and Structures ( IF 4.1 ) Pub Date : 2020-10-07 , DOI: 10.1088/1361-665x/abb355
Fevzi Cakmak Bolat 1 , Selim Sivrioglu 2
Affiliation  

This study examined the control performance of a multi-layer smart beam structure in which the middle layer was partially filled with magnetorheological (MR) fluid. A galloping profile was connected to the endpoint to obtain vibration from this smart beam element in a regular regime. Flow-induced continuous vibration was created on the beam element by giving wind load from a certain distance to this galloping profile. The natural frequency values of the smart beam element were obtained analytically using the lumped parameter mathematical model, and their accuracy was compared with numerical methods. An electromagnet was placed opposite to MR fluid region to suppress vibrations by creating an actuator relationship with the smart beam. A norm-based H∞ robust control design was realized by taking the natural frequencies of the beam element into account. The control design was applied to the experimental system and the effectiveness of the controller was tested under various conditions. It was observed that the proposed MR fluid embedded active control structure has good properties to suppress the wind-induced vibrations in practice.

中文翻译:

风激飞驰效应联合暴露的MR流体嵌入智能梁的弯曲振动控制

本研究检验了中间层部分填充磁流变 (MR) 流体的多层智能梁结构的控制性能。一个奔腾的轮廓被连接到端点,以从这个智能梁元件中获得规律的振动。通过将一定距离的风载荷施加到这个飞驰的轮廓上,在梁元件上产生了流动引起的连续振动。利用集总参数数学模型解析获得了智能梁单元的固有频率值,并将其精度与数值方法进行了比较。电磁铁被放置在 MR 流体区域的对面,通过与智能梁建立致动器关系来抑制振动。通过考虑梁单元的固有频率,实现了基于范数的 H∞ 鲁棒控制设计。将控制设计应用于实验系统,并在各种条件下测试控制器的有效性。据观察,所提出的 MR 流体嵌入式主动控制结构在实践中具有良好的抑制风致振动的特性。
更新日期:2020-10-07
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