Research Initiation: A Study of the Optimal Number of Location of Control Forces for Active Vibration Control of Contained Acoustic Fields

封闭空间的噪声控制一直是一个非常重要的课题。传统的被动技术往往是不可行的，因为固有的过多的权重惩罚与该方法相关联。这对于飞机或航天器环境来说尤其如此。近年来，主动控制方法受到了越来越多的关注，并取得了初步的成果。该项目扩展了这种主动控制推力。它研究了通过对壳壁施加控制力来控制圆柱壳内噪声的基本问题，以减少与向封闭腔内传递声能相关的特定振动模式。

Noise control for enclosed spaces continues to be a very important topic. Traditional passive techniques are often not feasible because of the inherent excessive weight penalty associated with the method. This is particularly true for aircraft or spacecraft environments. Recently, active control methods have received more attention and early results are promising. This project extends this active control thrust. It investigates the fundamental problem of controlling the noise within a cylindrical shell by applying control forces to the shell wall in order to reduce particular vibration modes associated with transmitting acoustical energy into the enclosed cavity.