摘要
为解决履带车辆振动信号受强噪声信号干扰的影响,运用小波变换原理,根据重构因子比较几种小波基,确定适合履带车辆振动信号的小波基和阈值,描述小波分层方法,对履带车辆振动信号进行去噪。仿真计算结果表明小波变换去噪方法能有效地抑制背景噪声,提取有用状态信息,提高信噪比和减小均方误差,为履带车辆振动信号预处理提供一种可行的方法。
In order to avoid an interference of strong noise to tracked vehicles vibration signal, using wavelet transform, several wavelet bases was compared according to reconstruction factors, then an appropriate wavelet base and threshold to processing vibration signals of tracked vehicles were determined, the wavelet layered method was described The simulation result indicated the wavelet transformation de-noising method can suppress the background noise effectively, extract useful state information, enhance the signal-to-noise ratio, reduce mean-square error and recover the interest weak signal buffed in intensive background noise.
出处
《噪声与振动控制》
CSCD
2012年第4期140-144,共5页
Noise and Vibration Control
基金
装甲车辆振动特性基础理论研究62301030102
关键词
振动与波
小波变换
履带车辆
振动信号
去噪
vibration and wave
wavelet transform
tracked vehicles
vibration signal
de-noising
