摘要
为了降低拖拉机驾驶室耳旁噪声,采集了拖拉机驾驶室耳旁噪声及左右车窗的加速度信号,并对其进行频谱分析;通过分析得到了拖拉机驾驶室耳旁噪声和左右车窗加速度的频率成分大部分与发动机的转速有关(即基频都是发动机转速一半)。提出了一种基于误差信号的FX-LMS主动降噪方法,建立了基于误差信号FX-LMS算法的Simulink仿真模型,并将拖拉机驾驶室内耳旁噪声信号导入到Simulink仿真模型中,把误差信号作为参考信号,对模型进行仿真分析。仿真结果表明:基于误差信号的FX-LMS主动降噪方法在拖拉机驾驶室耳旁有10～15 d B的降噪效果。
In order to reduce the noise near the ear of the tractor driver s cab,the noise and acceleration signal of the left and right window of the tractor driver s cab are collected and the spectrum analysis of the noise and acceleration signal is carried out.The analysis shows that the frequency of the noise and the acceleration of the left and right window accelerations in the tractor cab are related to the engine speed(the fundamental frequency is half the engine speed).A FX-LMS active noise reduction method based on the error signal is proposed,and a Simulink simulation model based on the error signal FX-LMS algorithm is set up.The noise signal of the tractor driver s ear side is introduced into the Simulink simulation model.The error signal is used as the reference signal to simulate the model.The simulation results show that the model is based on the simulation results.The FX-LMS active noise reduction method of error signal has 10~15 dB noise reduction effect on the ear of tractor cab.
作者
李忠利
邹会勉
乔冬冬
陈修魁
刘小锋
LI Zhong-li;ZOU Hui-mian;QIAO Dong-dong;CHEN Xiu-kui;LIU Xiao-feng(College of Vehicle and Traffic Engineering,Henan University of Science and Technology,Luoyang 471003,China)
出处
《科学技术与工程》
北大核心
2018年第33期30-35,共6页
Science Technology and Engineering
基金
国家科技部专项(2016YFD070100-2)资助
关键词
拖拉机驾驶室
耳旁噪声
误差信号
FX-LMS算法
主动降噪
the tractor driver's cab
the noise near the ear
error signal
FX-LMS algorithm
active noise reduction control
