Diagnosis for Rotating Shaft Using Adaptive Modal Parameter Identification Method

It's important to understand the dynamic behavior of a structure under operating condition from the view point of vibration shapes of a structure on well excited frequency components and accurate identification of amplitude on each point of a structure. Operating Deflection Shapes (ODSs) can be defined for nonlinear and non stationary structural motion. ODSs provide very useful information for understanding and evaluating the absolute dynamic behavior of a machine, component or an entire structure. In this study. we use adaptive modal parameter Identification method to identify ODSs. The method we use in this study is to perform condition monitoring based on ODSs and diagnosis by changing modal characteristics. We confirm the effectiveness this method by simulation and experiment. It is applied for a rotating machinery with an overhung rotor.