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Semi-active vibration control unit tuned to maximise electric power dissipation
Journal of Sound and Vibration ( IF 4.7 ) Pub Date : 2021-02-03 , DOI: 10.1016/j.jsv.2021.116000
Paolo Gardonio , Emanuele Turco , Aleksander Kras , Loris Dal Bo , Daniel Casagrande

This paper proposes a local approach for the on-line tuning of a semi-active vibration control unit, which is set to reduce the resonant response of target low-order flexural modes of distributed structures subject to broadband stochastic disturbances. The idea is to have multiple self-contained units, which can be fixed on thin walled structures to reduce flexural vibration and sound radiation at low audio frequencies where the dynamics of the structures is controlled by the resonant response of low-order flexural modes. The unit is formed by an electromagnetic seismic transducer connected to a resistive-inductive shunt. The proposed local tuning criterion is based on the maximisation of the time-averaged electrical power dissipated by the shunt. Both simulation and experimental results are presented for a setup where a unit is mounted on a thin plate model wall-structure excited by a broadband random force and is set to reduce the resonant response of target flexural modes. The paper investigates the physics of four tuning criteria with reference to the resonant response of the target flexural natural modes. First, the minimisation of the time-averaged total flexural kinetic energy of the plate; second, the maximisation of the time-averaged vibration power absorbed by the unit; third, the maximisation of the time-averaged mechanical power dissipated by the transducer and fourth, the maximisation of the time-averaged electrical power dissipated by the coil and shunt. The paper shows that, for small mechanical and Eddy currents damping effects of the transducer, the maximisation of the time-averaged electric power dissipated by the coil and shunt gives similar tuning parameters, and thus comparable vibration control effects, than the reference cost function based on the minimisation of the time-averaged total flexural kinetic energy of the plate.



中文翻译:

半主动式振动控制单元经过调整,可最大程度地降低功耗

本文提出了一种用于半主动振动控制单元在线调谐的局部方法,该方法旨在减少受宽带随机扰动影响的分布式结构目标低阶弯曲模式的共振响应。这个想法是要有多个独立的单元,这些单元可以固定在薄壁结构上以减少低音频频率下的弯曲振动和声音辐射,其中结构的动力学由低阶弯曲模式的共振响应控制。该单元由连接到电阻感应分流器的电磁地震传感器形成。所提出的局部调谐准则基于分流器耗散的时间平均电功率的最大化。仿真和实验结果均针对设置进行了介绍,在该设置中,将单元安装在由宽带随机力激发的薄板模型壁结构上,并设置为减小目标弯曲模式的共振响应。本文参考目标挠曲自然模式的共振响应,研究了四种调整标准的物理原理。首先,使板的时间平均总弯曲动能最小化;第二,最大化单元吸收的时间平均振动功率。第三,由换能器耗散的时间平均机械功率的最大值,第四,由线圈和分流器耗散的时间平均机械功率的最大值。论文表明,对于传感器的较小的机械和涡电流阻尼效应,

更新日期:2021-02-17
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