摘要
风洞噪声不仅直接影响人们的身心健康,更重要的是较大的背景噪声还降低了风洞声学试验能力和试验精度,降低风洞噪声已成为风洞建设中攻关的关键技术问题。因此提出基于Fx-LMS自适应控制算法实现一维离散噪声主动控制,实验结果表明其能有效解决单波麦克风失匹配带来的误差,减小权系数变化对系统的影响,提高系统收敛速度;根据优化后的算法参数,在0.55 m×0.4 m声学风洞消声室进行管道噪声主动降噪实验,获得理想的降噪效果。
Noise of wind tunnels can seriously reduce the reliability and precision of wind tunnel testing. Thus, noise reduction of wind tunnels has become a key technical issue of wind tunnel construction. In this paper, a 1-D discrete active noise control (ANC) is put forward based on Fx-LMS. The results indicate that this method can minimize the error caused by microphone mismatch, decrease the influence of the weight coefficients changing on the system and increase the system convergence speed. According to the optimized algorithm parameters, the active noise control test of the duct is done in an anechoic chamber of 0.55m×0.4m of the aero-acoustic wind tunnel. Good noise reduction effect is obtained.
作者
顾正华
王飞
盖文
周平
GU Zheng-hua;WANG Fei;GAI Wen;ZHOU Ping(Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center,Mianyang 621000, Sichuan China)
出处
《噪声与振动控制》
CSCD
2016年第6期106-110,共5页
Noise and Vibration Control
关键词
声学
风洞
背景噪声
Fx-LMS自适应算法
主动控制
降噪
acoustics
wind tunnel
background noise
Fx-LMS adaptive algorithm
active noise control (ANC)
noise decrease
作者简介
顾正华（1980－），男，四川省金阳县人，硕士，研究方向为数据采集、信号处理与仿真。E-mail: gujun811@163.com
