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Active control of aircraft cabin noise and vibration using a physical model.

机译：使用物理模型主动控制机舱噪声和振动。

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In this thesis, active noise and vibration control of aircraft cabins is investigated, in which aircraft cabins are modeled as a cylindrical shell with a floor partition. As the first step toward a successful control strategy, a structural acoustic coupling analysis of the investigated structure is carried out. A new method called "Radiation Efficiency Analysis of Structural Modes (REASM)", suitable for enclosures with irregular shapes, is proposed and applied in the current analysis. Then, the optimal design of control systems consisting of PZT actuators and PVDF error sensors is discussed. A novel design method for PVDF error sensors called "GA-based method" is introduced and shown to be very effective when complex structures are involved. Finally, an active control system is implemented on a scaled laboratory aircraft-cabin model. Both the simulation and experimental results show the great potential of using piezoelectric transducers in noise control and the significant performance improvement achieved through optimal design.
机译：本文研究了机舱的主动噪声和振动控制，其中机舱被建模为带有地板隔板的圆柱形壳体。作为成功控制策略的第一步，对所研究的结构进行了结构声耦合分析。提出了一种适用于具有不规则形状的外壳的称为“结构模式的辐射效率分析”的新方法，并将其应用于当前的分析中。然后，讨论了由PZT执行器和PVDF误差传感器组成的控制系统的优化设计。介绍了一种新的PVDF误差传感器设计方法，称为“基于GA的方法”，当涉及复杂结构时，该方法显示出非常有效的效果。最后，在比例实验室飞机机舱模型上实现了主动控制系统。仿真和实验结果均表明，在噪声控制中使用压电换能器具有巨大潜力，并且通过优化设计可以显着提高性能。

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