A New Method for Extracting the Weak Fault Symptoms of Current Signal via SVD
Kenan Zhang · Machine Tool & Hydraulics · 2006
While using MCSA(motor current signal analysis) to diagnose the mechanical faults,the weak fault symptoms are often submerged by power frequency.A new method for extracting the weak fault symptoms of current signal in the case of current diagnosis was presented.By means of SVD(singular value decomposition) method,the power frequency was effectively eliminated meanwhile the weak features were effectively extracted.The computer simulation and a practical application were described,which indicates SVD method can eliminate the power frequency and extract the weak fault symptoms very effectively.