Single-channel vibration signal separation by combining empirical mode decomposition with time-frequency analysis
Qiang Li · 2013
The separation method of single-channel vibration signal was explored to accomplish the extraction of mechanical vibration source signals.The ensemble empirical mode decomposition technology was utilized to construct the pseudo multi-channel measurement signals.The principal component analysis method was used to determine the number of vibration source signals by the distribution of eigenvalues.Then,the blind source separation algorithm based on timefrequency analysis was implemented to acquire the vibration source signals.The experimental results show that the singlechannel vibration signal can be effectively separated.The proposed method is feasible and practical.