基于新型材料的吸振器设计及电流控制方法

被动式吸振器(passive dynamic vibration absorber,简称PDVA)结构参数不可调,减振频带单一,不适用于宽频减振。为解决上述问题,首先,以磁流变弹性体(magnetorh-eological elastomer,简称MRE)为刚度元件,设计一种刚度可调的自适应吸振器(adaptive dynamic vibration absorber,简称ADVA);其次,对弹性体原料组成及磁流变效应进行介绍和分析;然后,对受控系统增加吸振器,引起系统新的共振问题提出了吸振器工作过程中的电流控制方法以消除新增的共振现象;最后,进行了仿真及实验研究。结果表明,本设计可将减振频带拓宽至11.37Hz,并且利用提出的电流控制方法可有效消除系统新增的共振峰。

Design of Broadband Vibration Absorber and Current Control Method

Passive dynamic vibration absorber (PDVA), whose structural parameters can not be adjusted and vibration frequency band is single, is not suitable for broadband vibration. To solve the above problem, first, the magnetorheological elastomer (MRE) is used as the stiffness element to design an adaptive dynamic vibration absorber (ADVA). Second, the composition and MR effect of MRE are introduced and analyzed. Then, the current control method in the process of dynamic vibration absorber is proposed to eliminate the new resonance phenomenon which is caused by the addition of a vibration absorber to the controlled system. Finally, the simulation and experiment results show that the design can broaden the vibration frequency band to 11.37Hz. At the same time, the new resonant peak of the controlled system is eliminated effectively by the proposed control method.