Experimental implementation of switching and sweeping tuneable vibration absorbers for broadband vibration control
Experimental implementation of switching and sweeping tuneable vibration absorbers for broadband vibration control
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DOI：
10.1016/j.jsv.2014.09.005
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发表时间：
2015-01
影响因子：
4.7
通讯作者：
M. Zilletti;P. Gardonio
中科院分区：
文献类型：
--
作者：
M. Zilletti;P. Gardonio
本文描述了两种半主动减振器(TVA)的实验室实现：切换TVA和横移TVA。这两个吸振器的设计目的是控制圆柱形管道在固定的宽带随机力激励下的低频总弯曲响应。这两个TVA是由安装在轴向弹簧上的地震质量组成的。这两种TVA都配备了相对位移和相对速度反馈控制系统，用于改变TVA的特征刚度和阻尼值，即特征固有频率和阻尼比。开关TVA周期性地调整其特征固有频率和阻尼比，以迭代控制因管道的三种目标弯曲固有模式而产生的共振响应。或者，扫频TVA在给定的范围内连续地改变其特征固有频率和阻尼比，以盲目地控制由相同的三种管道弯曲固有模式引起的共振响应。文中给出了用于迭代或连续调谐TVA的反馈回路的仿真和实验结果，以及两个半主动TVA产生的振动的减小。仿真和实验结果表明，这两种TVA都能有效地控制管道在低频段的弯曲响应，其特征是管道的三个目标弯曲固有模式发生共振。
This paper describes the laboratory implementation of two semi-activetuned vibration absorbers(TVAs): aswitchingTVA and asweepingTVA. The two absorbers are designed to control the low frequency total flexural response of a cylindrical duct excited by a stationary broadband random force. The two TVAs are composed by a seismic mass mounted on a axial spring. Both TVAs are equipped with a relative displacement and relative velocity feedback control system, which is used to vary the characteristic stiffness and damping, that is the characteristic natural frequency and damping ratio, of the TVA. The switching TVA cyclically tunes its characteristic natural frequency and damping ratio to iteratively control the resonant responses due to three targeted flexural natural modes of the duct. Alternatively the sweeping TVA continuously varies its characteristic natural frequency and damping ratio within given ranges to blindly control the resonant responses due to the same three flexural natural modes of the duct. The paper presents both simulation and experimental results regarding the feedback loop used to iteratively or continuously tune the TVAs and about the reduction of vibration produced by the two semi-active TVAs. The simulation and the experimental results show that both TVAs effectively control the flexural response of the duct in the low frequency band, which is characterised by the resonances of the three targeted flexural natural modes of the duct.