EMPLOYING IDENTIFICATION PROCEDURES FOR THE DETECTION OF CRACKS IN ROTORS

This paper deals with the identification of cracks in rotors. The proc edures employed are based on the extended Kalman filter (EKF), and the instrumental variables (IV) method. It shows how a modal EKF (MOKF) s uitable for application to systems with a large number of dofs can be designed. A combination of the EKF and the IV-method is also presented . The feasibility of the procedures to detect cracks in rotors is prov ed by two examples. First, the crack depth of a simulated rotor is cal culated. Then, the procedures are applied to a rotor test rig in order to determine the crack depth.