振动噪声监测, 盲源分离, 弱特征信号, 特征提取

For monitoring vibration, the signals acquired from sensors are the mixture of vibration signal of machines and the environmental noise. The blind source separation can extract the feature signals of each machine from the mixed signals. A blind source separation algorithm was proposed herein to extract the feature signal in the presence of the environmental noise. The experimental investigation of extraction of the feature signal from mechanical vibration signals mixed with environmental noise was carried out, and the results show that the algorithm can eliminate the influence of environmental noise and extract the weak signals of the machine. 

vibration and noise monitoring, blind source separation, weak feature signal;feature extraction