基于小波理论的电机电流信号消噪研究

摘要

小波分析是当前应用数学和工程学科中一个迅速发展的新领域.小波分析具有良好的多分辨分析能力,因而已广泛应用于信号和图像的消噪.而对电机电流信号进行消噪对于整个工程系统的分析具有很重要的意义,因此采用小波阈值消噪法对电机的电流信号进行了消噪.首先介绍了小波阈值消噪法的原理,然后用noisbump信号验证小波阈值消噪法的可行性,之后再用该方法对实验测取的电机电流信号进行消噪.消噪的效果表明:采用小波阈值消噪法对电机电流信号进行消噪,是一种可行的方法.%Wavelet analysis is a new rapid development field in applied mathematics and engineer- ing.With good multi-resolution capabilities,wavelet analysis is widely used in signal and image de-noising. Yet the denoising of motor current signal is of great importance in the analysis of total engineering system. Therefore the motor current signal is denoised by adopting the method of wavelet threshoL First,the principle of the method of wavelet threshol is introduced,Then ,the noisbump signal is applied to test the feasibility of the methodAt last the motor current signal obtained through test shall be denoised using the method. The results indicate that the method of wavelet threshold is a proven to be feasible in denoising the motor current signal.