提出了一种基于HHT的FCL(分型守恒定律,Fractal Conservation Law)与小波动态阈值联合去噪的方法.该方法将原始的人、车震动信号经过HHT分解后得到该震动信号的不同频率分量.对低频信号部分,采用FCL算法进行去噪,对去噪后的各个低频信号进行重组;对高频信号部分,采用小波动态阈值滤波去噪并重组高频信号.将重组后的高、低频信号进行求和得到降噪后信号.
A combined method of signal denoising based on HHT is presented. In this method, the different frequency components of the vibration signal are obtained by the HHT. The low frequency signals are used FCL (Fractal Conservation Law) algorithm for denoising before recombining signals. At the same time, high frequency IMF components are carried on the wavelet dynamic threshold for denoising, and then recombine the IMF components to complete the original signal filter processing.