Characterizing vibration signals utilizing morphological pattern spectrum for gear fault diagnosis

Abstract

In this investigation, we present an alternative technique to characterize the vibration signals by utilizing the morphological pattern spectrum (MPS) based on the mathematical morphology theory. Different from the conventional morphological pattern spectrum which is based on morphological open operator, we extend the morphological pattern spectrum with other morphological operators. Vibration signals measured from a gearbox with three operating states are employed to evaluate the effectiveness of MPS. Experimental results have demonstrated the extended MPS calculated based on morphological erosion operator to be very effective on characterizin g vibration signals for gear fault diagnosis.