A Smart Dynamic Vibration Absorber for Suppressing the Vibration of a String Supported by Flexible Beams
A Smart Dynamic Vibration Absorber for Suppressing the Vibration of a String Supported by Flexible Beams
复制标题
一种用于抑制柔性梁支撑弦振动的智能动态减振器
DOI：
10.1088/0964-1726/23/2/025032
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发表时间：
2014
影响因子：
4.1
通讯作者：
M. Chiba
中科院分区：
文献类型：
--
作者：
Y. Nambu;S. Yamamoto;M. Chiba
本研究旨在利用智能动力吸振器(DVA)对张拉稳定结构(TSS)进行有效而稳健的减振研究。近年来，为实现先进的航天任务，出现了对高精度、高功能的空间结构系统的强烈需求。在这方面，SSSS作为具有高存储效率的大型而轻便的结构系统而引起了人们的关注。TSS应用中的一个基本问题是弦线的振动控制，其中TSS主要由弦线组成。特别是，微振动的抑制是困难的，因为变形几乎垂直于振动方向。DVA是一种抑制微振动的有效装置。然而，阻尼器的减振性能对动态特性的变化很敏感。此外，老化降解和温度依赖性对DVA性能产生负面影响。本研究旨在开发一种具有自感知驱动的智能主动DVA，以提高健壮性。利用带有压电换能器的小悬臂梁作为智能DVA。数值仿真和实验表明，无源DVA和智能DVA抑制了振动，但智能DVA表现出更好的有效性和鲁棒性。
This study aims to effectively and robustly suppress the vibration of tension-stabilized structures (TSSs) using a smart dynamic vibration absorber (DVA). In recent years, a strong need has emerged for high-precision and high-functionality space structural systems for realizing advanced space missions. TSSs have attracted attention in this regard as large yet lightweight structural systems with high storage efficiency. A fundamental issue in the application of TSSs is vibration control of strings, of which TSSs are predominantly composed. In particular, the suppression of microvibrations is difficult because the deformation is almost perpendicular to the direction of vibration. A DVA is an effective device for suppressing microvibrations. However, the damping performance is sensitive to changes in dynamic properties. Furthermore, aging degradation and temperature dependence negatively affect DVA performance. This study aimed to develop a smart, active DVA with self-sensing actuation to improve robustness. A small cantilever with a piezoelectric transducer was utilized as a smart DVA. Numerical simulations and experiments showed that a passive DVA and the smart DVA suppressed vibrations but that the smart DVA showed improved effectiveness and robustness.