摘要
某电源信号是典型的非平稳、非线性信号,信号中带有各种噪声,需进行适当处理。小波变换时的频局域性好,是分析非平稳信号的有效工具之一。研究基于小波变换的阈值消噪法,借助LabVIEW平台,通过仿真试验,对软阈值和硬阈值消噪及采用不同的小波函数消噪进行了分析。应用LabVIEW对电源信号进行采集,并且对LabVIEW中调用Matlab里的小波函数进行去噪分析的程序进行研究,收到良好的效果,为进一步提高电源信号消噪处理的效果奠定了基础。
Power signal of some equipment is typically non- stationary and nonlinear, inevitably, there are kinds of yawp which need being disposed. The time frequency character of wavelet transform is perfect, and it is an effective tool of analyzing non - stationa- ry signal. Threshold denoising based on wavelet transform is introduced, in virtue of LabVIEW plate, by simulating test, soft thresh- old de-noising is compared to hard threshold de- noising,and different wavelet function are selected for de- noising,the validity of threshold de - noising based on wavelet transform is proved in the process of power signal de - noising. The electrical power signal by data acquisition card in the LabVIEW developing environment, the wavelet function in Matlab is called to make the study of de-noising analysis. The signal de - noising process and testing platform based on wavelet analysis theory and virtual equipment is completed. This study idea could found the base of pushing the de- noising process effect of all kinds of signal.
出处
《现代电子技术》
2009年第20期175-177,共3页
Modern Electronics Technique
