Abstract：In order to reduce the random noises and pulse disturbances in acoustic emission (AE) signals and to enhance the quality of useful signals, A new method combining median filter and singular value decomposition was proposed. Firstly, the outliers in the original AE signals were suppressed by median filter. Secondly, signal sequences removed outliers was reconstructed in phase space, and the attractor track matrix was decomposed by singular value decomposition (SVD). Finally, the concept of energy difference spectrum of singular value was put forward to determine reconstruction order of singular value according to its major peak position. The numerical simulation results and measured data of degumming and surface fracture of five-plywood show that the method proposed in the paper can retain the original signal characteristic efficiently, and can eliminate noise and enhance the signal-to-noise ratio in a maximum extent.
徐锋;刘云飞. 基于中值滤波－奇异值分解的胶合板拉伸声发射信号降噪方法研究[J]. , 2011, 30(12): 135-140.
XU Feng;LIU Yun-Fei. Research on noise reduction of acoustic emission signals generated from plywood stretching based on median filter-singular value decomposition. , 2011, 30(12): 135-140.
2011, Vol. 30 
