约束面板声场信号的互相关处理

C. C. Tan, C. Hird, Y. Okada
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引用次数: 1

摘要

测试了互相关法在柔性板振动引起的结构噪声主动控制中的适用性。计算机仿真结果表明,该方法在抑制平板振动方面具有很大的应用潜力。然而,在实际应用中存在一些局限性,如延迟时移的计算、驱动和响应信号的数字采样以及控制器处模拟驱动信号的生成。即使有这些限制,结果显示,从板辐射的声功率在0.5到3.8 dB之间的整体降低。该技术的优点是操作简单,易于实现。
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Processing of sound field signal of a constrained panel by cross-correlation
The application of cross-correlation was tested for its suitability for active noise control of structure borne noise resulted from flexible panel vibration. The results on computer simulation show a great potential for its application in suppression of plate vibration. However in practical applications there are limitations, such as computation of the delay time shift, digital sampling of the driving and response signals and the generation of analog actuating signals at the controller. Even with these limitations, the results show a global reduction of sound power radiated from the plate of between 0.5 to 3.8 dB. An advantage of the technique is its simplicity in operation and ease of implementation.
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