摘要
采用小波变换软阈值去噪的方法,对汽车发动机异响的原始信号进行分解和降噪处理。结果表明,小波去噪的方法具有很好的效果,能够满足工程实际的需要,为进一步分析异响信号获得了噪声极小的有效数据。
With the soft-threshold noise reduction of wavelet transform, the processing of both decomposition and noise reduction are carried to automobile engine knock signal. The results show that the method has good effects on the noise reduction and can meet the needs of engineering. It offers the useful data for further analyzing the knock signals.
出处
《长春工业大学学报》
CAS
2007年第2期184-186,共3页
Journal of Changchun University of Technology
关键词
小波变换
软阈值
去噪
异响信号
发动机
wavelet transform
soft-threshold
knock signal
noise reduction
engine.
