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Theoretical and experimental study on active sound transmission control based on single structural mode actuation using point force actuators

机译:基于点力执行器的单结构模式驱动的主动声传递控制的理论和实验研究

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This study deals with the feedforward active control of sound transmission through a simply supported rectangular panel using vibration actuators. The control effect largely depends on the excitation method, including the number and locations of actuators. In order to obtain a large control effect at low frequencies over a wide frequency, an active transmission control method based on single structural mode actuation is proposed. Then, with the goal of examining the feasibility of the proposed method, the (1, 3) mode is selected as the target mode and a modal actuation method in combination with six point force actuators is considered. Assuming that a single input single output feedforward control is used, sound transmission in the case minimizing the transmitted sound power is calculated for some actuation methods. Simulation results showed that the (1, 3) modal actuation is globally effective at reducing the sound transmission by more than 10 dB in the low-frequency range for both normal and oblique incidences. Finally, experimental results also showed that a large reduction could be achieved in the low-frequency range, which proves the validity and feasibility of the proposed method.
机译:这项研究涉及使用振动执行器通过简单支撑的矩形面板对声音传播进行前馈主动控制。控制效果很大程度上取决于激励方法,包括执行器的数量和位置。为了在宽频率下的低频下获得较大的控制效果,提出了一种基于单结构模式致动的主动传动控制方法。然后,以检验所提出方法的可行性为目标,选择(1,3)模式作为目标模式,并考虑了一种结合六点力致动器的模态致动方法。假设使用单输入单输出前馈控制,则对于某些致动方法,计算在最小化所传输的声功率的情况下的声音传输。仿真结果表明,对于正常和倾斜入射,(1,3)模态致动在低频范围内都可以有效地将声音传输降低10 dB以上。最后,实验结果还表明,在低频范围内可以实现较大的减小,证明了该方法的有效性和可行性。

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