Adaptive time-frequency analysis and its application in diagnosis for large rotating machinery

With large rotating machinery is increasingly directed towards continuous operation with high speed mid heavy loads, the vibration behavior of rotor systems is more and more complex, As a result, traditional processing methods are confronted with a huge challenge. Aims at the defects of different joint time-frequency representations, an adaptive time-frequency decomposition is presented. The computer simulations show that this method possesses high time-frequency resolution, and have no interference terms. The analysis results of transient vibration during passing critical speed indicate this technique is very effective.