Suppression of Noise Radiation from a Plate Using Self-Sensing Actuators
Suppression of Noise Radiation from a Plate Using Self-Sensing Actuators
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DOI：
10.1177/1045389x05053915
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发表时间：
2005-12
影响因子：
2.7
通讯作者：
J. Qiu;J. Tani;M. Haraguchi
中科院分区：
文献类型：
--
作者：
J. Qiu;J. Tani;M. Haraguchi
本文介绍了使用带有内置压电元件的先进复合板进行主动噪声隔离的研究，该复合板既用作传感器又用作执行器。基于瑞利积分公式构建了一个识别系统，该系统根据智能板内置压电元件的电压信号来估计辐射声音，因此无需外部麦克风即可进行噪声控制。 FIR（有限脉冲响应）滤波器用作控制器，并使用 Filtered-X LMS 算法自适应更新其系数，以最小化声压的估计值。自感应执行器技术也用于减少控制中所需压电元件的数量。进行了实验，结果表明，在几个谐振峰处成功降低了传输噪声水平。
This article presents a study of active noise isolation using an advanced composite board with built-in piezoelectric elements, which are used as both sensors and actuators. An identification system, which estimates the radiated sound from the voltage signals of the built-in piezoelectric elements in the smart board, was constructed based on Rayleigh's integral formula so that no external microphone is needed for noise control. A FIR (Finite Impulse Response) filter was used as the controller and its coefficients were updated adaptively using the Filtered-X LMS algorithm to minimize the estimated value of the sound pressure. The technique of self-sensing actuators was also used to reduce the number of needed piezoelectric elements in the control. Experiments were performed and the results showed that the transmitted noise level was successfully reduced at several resonant peaks.