摘要
小波变换的方法可以降低电机控制系统中的噪声影响,通过变换分解出高频噪声部分,利用小波收缩的阈值量化方法去掉高频部分,再重构信号从而达到去噪目的,通过实验总结出SYM12结合软阈值处理法在信号重构及去噪效果方面都是最优的。
The wavelet transform is used to reduce the high frequency noise of motor control system signal. This transform decomposes the signal, thus separating the high frequencies due to noise effects. After the decomposition, the wavelet shrinkage is performed by thresholding to eliminate the high frequency component. Then the signal can be reconstructed without the high frequency component. We performed a comparative de-noising study respectively using the daubechies wavelet and symmlets wavelet shrinkage technique. From the test one can verify again that the best results were obtained using SYM12 with ST.
出处
《煤矿机械》
北大核心
2005年第6期23-24,共2页
Coal Mine Machinery
关键词
小波收缩
软阅值
硬阈值
电机控制系统
wavelet shrinkage
soft threshold
hard threshold
motor control system
