一种针对紧凑式管道有源降噪系统的误差传感策略  

An error sensing strategy for a compact duct active noise control system

作　　者：陈柏村 陶建成[1] Chen Baicun;Tao Jiancheng(Key Laboratory of Modern Acoustics,Ministry of Education,Institute of Acoustics of Nanjing University,Nanjing,210093,China)

机构地区：[1]南京大学声学研究所,近代声学教育部重点实验室,南京210093

出　　处：《南京大学学报（自然科学版）》2021年第6期1013-1022,共10页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金(11874218,11874219)。

摘　　要：次级源和误差传声器的布放是决定有源噪声控制系统降噪性能的重要因素.针对嵌入在管道中的紧凑式有源噪声控制系统,建立了半无限长矩形管道的声传输解析模型,系统地分析了误差传声器和次级源布放位置对低频声辐射控制效果的影响.针对截面为正方形的管道,提出了一种多传声器的误差传感策略,仿真和实验结果表明,使用该策略可有效提升紧凑式有源降噪系统在管道截止频率以下的降噪效果.The placement of secondary sources and error microphones is an important factor that determines the noise reduction performance of an ANC(active noise control) system. This paper focuses on the compact ANC system embedded in the middle of the duct. An analytical model of sound transmission in a semi-infinite rectangular duct is established based on the modal expansion method. The effect of the placement of the error microphones and the secondary source on the noise reduction of the ANC system is systematically analyzed. For ducts with square cross-sections,a multi-microphone error sensing strategy is proposed to improve the noise control performance. Simulation and experimental results show that the proposed error strategy can improve the noise reduction of the compact ANC system below the cut-off frequency of the duct.

关 键 词：管道有源降噪 紧凑系统 误差传感策略 

分 类 号：O429[理学—声学]