  In this study, a novel non-negative tensor factorization (NTF)-based method
for vibration-based local damage detection in rolling element bearings is
proposed. As the diagnostic signal registered from a faulty machine is
non-stationary, the time-frequency method is frequently used as a primary
decomposition technique. It is proposed here to extract multi-linear NTF-based
components from a 3D array of time-frequency representations of an observed
signal partitioned into blocks. As a result, frequency and temporal informative
components can be efficiently separated from non-informative ones. The
experiments performed on synthetic and real signals demonstrate the high
efficiency of the proposed method with respect to the already known
non-negative matrix factorization approach.
