Inertial Actuator with Virtual Mass for Active Vibration Control

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2020-09-30 DOI:10.20855/ijav.2020.25.31681

Qibo Mao, Shenquan Li, Shizuo Huang

引用次数: 5

Abstract

Inertial actuators (IAs) are often used as control units in active noise and vibration control systems. It is wellknown that the IA’s natural frequency should be far below that of the structure under control to ensure good stability margins. However, under normal circumstances, an IA with low natural frequency either increases the additional weight or causes unwanted static displacement of the IA’s proof-mass. In this study, an IA with virtual mass is presented to reduce the IA’s natural frequency without changing its physical design. The virtual mass of the IA is realized by using the proof-mass acceleration feedback as a local loop within the IA. Thus, the IA’s natural frequency can be shifted to low frequency for active control application. The proposed IA with virtual mass is then applied to actively control a clamped beam’s vibration based on the velocity feedback control system. The experimental results show that the stability of the control system and the control performance can be improved significantly as the IA’s natural frequency is reduced with virtual mass.

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基于虚质量的惯性作动器振动主动控制

惯性致动器（IA）经常被用作主动噪声和振动控制系统中的控制单元。众所周知，IA的固有频率应远低于受控结构的固有频率，以确保良好的稳定裕度。然而，在正常情况下，具有低固有频率的IA会增加额外的重量或导致IA的验证质量发生不必要的静态位移。在本研究中，提出了一种具有虚拟质量的IA，以在不改变其物理设计的情况下降低IA的固有频率。IA的虚拟质量是通过将验证质量加速度反馈作为IA内的局部回路来实现的。因此，IA的固有频率可以转移到低频，用于主动控制应用。然后将所提出的具有虚拟质量的IA应用于基于速度反馈控制系统的夹紧梁的振动主动控制。实验结果表明，采用虚拟质量降低IA的固有频率，可以显著提高控制系统的稳定性和控制性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Acoustics and Vibration ACOUSTICS-ENGINEERING, MECHANICAL

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

12 months

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