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首页> 外文期刊>The Journal of the Acoustical Society of America >Virtual sensors for active noise control in acoustic-structural coupled enclosures using structural sensing: Part II-Optimization of structural sensor placement
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Virtual sensors for active noise control in acoustic-structural coupled enclosures using structural sensing: Part II-Optimization of structural sensor placement

机译：使用结构传感在声-结构耦合外壳中进行主动噪声控制的虚拟传感器：第二部分-结构传感器放置的优化

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The work proposed an optimization approach for structural sensor placement to improve the performance of vibro-acoustic virtual sensor for active noise control applications. The vibro-acoustic virtual sensor was designed to estimate the interior sound pressure of an acoustic-structural coupled enclosure using structural sensors. A spectral-spatial performance metric was proposed, which was used to quantify the averaged structural sensor output energy of a vibro-acoustic system excited by a spatially varying point source. It was shown that (i) the overall virtual sensing error energy was contributed additively by the modal virtual sensing error and the measurement noise energy; (ii) each of the modal virtual sensing error system was contributed by both the modal observability levels for the structural sensing and the target acoustic virtual sensing; and further (iii) the strength of each modal observability level was influenced by the modal coupling and resonance frequencies of the associated uncoupled structural/cavity modes. An optimal design of structural sensor placement was proposed to achieve sufficiently high modal observability levels for certain important panel- and cavity-controlled modes. Numerical analysis on a panel-cavity system demonstrated the importance of structural sensor placement on virtual sensing and active noise control performance, particularly for cavity-controlled modes.(c) 2011 Acoustical Society of America.
机译：这项工作提出了一种结构传感器放置的优化方法，以改善用于主动噪声控制应用的振动声虚拟传感器的性能。振动声学虚拟传感器的设计旨在使用结构传感器来估计声学结构耦合外壳的内部声压。提出了一种频谱空间性能度量，该度量用于量化由空间变化点源激发的振动声系统的平均结构传感器输出能量。结果表明：（i）整体虚拟感测误差能量是由模态虚拟感测误差和测量噪声能量相加贡献的; （ii）每个模态虚拟感测误差系统均由结构感测和目标声学虚拟感测的模态可观察性水平贡献; （iii）每个模态可观测水平的强度受到相关联的未耦合结构/空腔模态的模态耦合和共振频率的影响。对于某些重要的面板和腔控制模式，提出了一种结构传感器放置的最佳设计，以实现足够高的模式可观察性水平。面板腔系统的数值分析表明，结构传感器放置对虚拟感测和主动噪声控制性能的重要性，特别是对于腔控制模式而言。（c）2011美国声学学会。

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