小波去噪在掘进机振动信号处理中的应用  

Application of Wavelet Denoising for Vibration Signal of Roadheader

作　　者：程旭文 黄建农[1,2] 董志峰 

机构地区：[1]中国矿业大北京,北京100083 [2]石家庄煤矿机械有限责任公司,石家庄050031

出　　处：《煤矿机械》2015年第7期230-232,共3页Coal Mine Machinery

基　　金：国家863项目2008AA062201

摘　　要：基于小波在时-频两域均能表征信号局部特征的特点,采用小波分解和小波包分解对掘进机三方向振动信号进行分解重构,比较sym4小波,sym5小波和小波包对振动信号的去噪能力,选择sym4对振动信号进行处理,获取掘进机振动信号的特征频率和振动峰值,掘进机截割头的主振频率在2~4 Hz内,振动峰值在11 gn左右。Because the time-frequency local feature can be well shown by wavelet, three directions vibration signals of the roadheader were reconstructed by using wavelet decomposition and wavelet packet decomposition. Comparing the ability of sym4 wavelet, sym5 wavelet and wavelet packet to denoise vibration signal, the sym4 wavelet was chosen to denoise vibration signal. The characteristic frequency of the vibration signal and vibration peaks were obtained. The main vibration frequency of cutter-head was 2~4 Hz,and the vibration peak was around 11 gn.

关 键 词：掘进机 小波去噪 振动信号 

分 类 号：TD421.5[矿业工程—矿山机电]