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Investigation of an Active Structural Acoustic Control System on a Complex 3D Structure

机译:复杂3D结构上有源结构声学控制系统的研究

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Interior noise inside the passenger cabin of ground vehicles can be classified as structure-borne and airborne. The disturbance caused by the engine forces excites the panels enclosing the passenger cabin to vibrate at their resonance frequencies. These vibrating panels cause changes in the sound pressure levels within the passenger cabin, and consequently generating an undesirable booming noise. In this study, we developed a methodology to design an active structural acoustic controller (ASAC) to attenuate the structure-borne noise, which is mainly caused by the most influential radiating panel. The panel is determined by conducting panel acoustic contribution analysis (PACA) based on the acoustic transfer vector (ATV) methodology. Then, active structural acoustic controller is designed for vibration suppression of this panel, which has complex geometry and boundary conditions. The performance of the controller for noise reduction is investigated for various controller parameters and sensor/actuator positions. It is shown that an optimization algorithm is required to determine the optimum controller parameters and sensor/actuator positions to reduce sound pressure levels inside the cabin efficiently.
机译:地面车辆乘客舱内的内部噪音可以被归类为结构和空中。由发动机力引起的扰动激发包围乘客舱的面板以其共振频率振动。这些振动板导致客舱内的声压水平的变化,从而产生不希望的蓬勃发展噪声。在这项研究中,我们开发了一种设计有源结构声控制器(ASAC)的方法,以衰减结构的噪声,主要由最有影响力的辐射面板引起。通过基于声学转移载体(ATV)方法进行面板声学贡献分析(PACA)来确定面板。然后,有源结构声控制器设计用于该面板的振动抑制,其具有复杂的几何形状和边界条件。针对各种控制器参数和传感器/致动器位置研究了用于降低噪声的控制器的性能。结果表明,优化算法需要确定最佳控制器参数和传感器/致动器位置,以有效地降低机舱内的声压水平。

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