Experimental estimation of misalignment effects in rotor-bearing-coupling systems

Abstract

In the present article the bearing and coupling dynamic parameters along with residual unbalances has been estimated for misalignment conditions in a flexible rotor-bearing-coupling system. These estimated parameters could be used as a measure of the misalignment. A model based approach has been experimentally tested with measured vibration data from a laboratory test rig. After estimating these parameters the reliability of estimated parameters was checked by the consistency of estimated parameters and by performing standard impact tests. It was observed that with more number of measurements consistencies of estimated parameters were very good. Moreover, the distinguishable splitting of natural frequency was observed as the amount of misalignment was increased.