基于主动压电-阻尼材料的噪声控制

Noise Control with Active Piezoelectric-Damping Composites

被动阻尼材料在进行噪声控制时 ,因其特性受温度和频率的影响 ,很难得到最优的控制性能 ,并且其有效性被限制在一个很窄的范围内。本文叙述了一种主动阻尼和被动阻尼混合的电路的控制原理和方法 ,并以控制从金属板辐射到一个三维附件的噪音为例 ,从理论和实验上说明了这种控制电路的可行性。

In view of the significant variation of damping material properties with temperature and frequency,it is difficult to achieve optimum performance when the damping materials to control noise are used.And the effectiveness of this treatment is limited to a narrow range.In this paper,the authors describe a new treatment which is a hybrid between active and passive damping.The research describes the feasibility of this treatment with the example of controlling the sound radiation from a plate into an three dimensional acoustic cavity.