Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong Special Administrative Region.
J Acoust Soc Am. 2012 Jul;132(1):197-207. doi: 10.1121/1.4714362.
An optimal design of a hybrid vibration absorber (HVA) with a displacement and a velocity feedback for minimizing the velocity response of the structure based on the H(2) optimization criterion is proposed. The objective of the optimal design is to reduce the total vibration energy of the vibrating structure under wideband excitation, i.e., the total area under the velocity response spectrum is minimized in this criterion. One of the inherent limitations of the traditional passive vibration absorber is that its vibration suppression is low if the mass ratio between the absorber mass and the mass of the primary structure is low. The active element of the proposed HVA helps further reduce the vibration of the controlled structure, and it can provide very good vibration absorption performance even at a low mass ratio. Both the passive and active elements are optimized together for the minimization of the mean square velocity of the primary system as well as the active force required in the HVA. The proposed HVA was tested on single degree-of-freedom (SDOF) and continuous vibrating structures and compared to the traditional passive vibration absorber.
提出了一种基于 H 2 优化准则的具有位移和速度反馈的混合振动吸收器（HVA）的最优设计，以最小化结构的速度响应。最优设计的目的是减少宽带激励下振动结构的总振动能，即在该准则下，最小化速度响应谱的总面积。传统被动式振动吸收器的一个固有局限性是，如果吸收器质量与主结构质量之间的质量比低，则其减振效果低。所提出的 HVA 的主动元件有助于进一步降低受控结构的振动，即使在低质量比的情况下，它也能提供非常好的减振性能。为了最小化主系统的均方速度和 HVA 中所需的主动力，同时对被动和主动元件进行了优化。在所提出的 HVA 上对单自由度（SDOF）和连续振动结构进行了测试，并与传统的被动式振动吸收器进行了比较。
