Sprofera Joseph D, Cabell Randolph H, Gibbs Gary P, Clark Robert L
Pratt School of Engineering, Duke University, Durham, North Carolina 27708, USA.
J Acoust Soc Am. 2007 Jul;122(1):271-9. doi: 10.1121/1.2739404.
A method for optimizing a structural acoustic control system subject to variations in plate boundary conditions is provided. The assumed modes method is used to build a plate model with varying levels of rotational boundary stiffness to simulate the dynamics of a plate with uncertain edge conditions. A transducer placement scoring process, involving Hankel singular values, is combined with a genetic optimization routine to find spatial locations robust to boundary condition variation. Predicted frequency response characteristics are examined, and theoretically optimized results are discussed in relation to the range of boundary conditions investigated. Modeled results indicate that it is possible to minimize the impact of uncertain boundary conditions in active structural acoustic control by optimizing the placement of transducers with respect to those uncertainties.
提供了一种针对板边界条件变化优化结构声学控制系统的方法。采用假设模态法构建具有不同旋转边界刚度水平的板模型，以模拟边缘条件不确定的板的动力学特性。将涉及汉克尔奇异值的换能器放置评分过程与遗传优化程序相结合，以找到对边界条件变化具有鲁棒性的空间位置。研究预测的频率响应特性，并结合所研究的边界条件范围讨论理论优化结果。建模结果表明，通过针对这些不确定性优化换能器的放置，可以在主动结构声学控制中最小化不确定边界条件的影响。
