面向工程应用的在线建模主动噪声控制方法改进  

Improvement in engineering-application-oriented online modeling active noise control methods

作　　者：鹿澳沣 董宁娟[2] 陈逸笑 薛青 沈昊 沈星[1] LU Aofeng;DONG Ningjuan;CHEN Yixiao;XUE QING;SHEN Hao;SHEN Xing(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Aircraft Strength Research Institute of China,Xi’an 710065,China)

机构地区：[1]南京航空航天大学航空学院,南京210016 [2]中国飞机强度研究所,西安710065

出　　处：《振动与冲击》2023年第20期253-262,共10页Journal of Vibration and Shock

基　　金：机械结构力学及控制国家重点实验室基金(MCMS-I-0520G01)。

摘　　要：通常在主动噪声控制系统中采取次级路径在线建模方式会带来更大计算量以及容易导致系统不稳定,使该方法一直难以得到工程应用。针对此问题,该研究提出面向工程应用的改进措施,具体包括:在次级路径建模环节采取次级声源依序发声方式以消除次级路径相互耦合的影响,增强系统稳定性;在噪声控制环节采用多通道快速算法降低计算量,减少系统信号处理负荷。经MATLAB软件进行仿真效果验证之后,基于NI-PXI平台开展主动噪声控制试验,结果表明,采用以上措施成功降低了计算量、改善了系统稳定性,取得了较好的降噪效果,各位置的平均降噪量能达13 dB以上,关键频率处降噪量能达18 dB以上,具备工程应用的可行性。The application of online secondary path modeling to an active noise control system gives rise to larger calculations and results in system instability.This makes it hard for the method to be applied to engineering projects.In view of this,some improvement measures were put forward for engineering application,including the method of sequential sounding of secondary sound sources during the secondary path modeling process,which was adopted to eliminate the effects of the secondary path intercoupling to improve system stability.Besides,a multichannel fast algorithm was adopted during the noise control process to minimize calculations and lessen system signal processing load.Matlab-based simulation verification was conducted on the proposed methods and active noise control experiments were carried out based on the NI-PXI platform.As revealed by the results,the aforesaid methods succeeded in lessening calculations and improving system stability,with desirable noise reduction effects.The noise reduction at various positions averages up to 13 dB.For the key frequencies,the noise reduction comes to above 18 dB.The aforesaid methods have the potential to be applied to engineering projects.

关 键 词：有源噪声控制 次级路径在线建模 附加建模信号 工程应用 

分 类 号：TB535[理学—物理]