A Simplified Model for the On-Line Identification of Bearing Direct-Dynamic Parameters Based On Algebraic Identification (AI)

In this paper, a mathematical model is presented to identify the direct dynamic coefficients (kxx, kzz, cxx, czz) of pressurized bearing in rotor-bearing system. The for online identification result application algebraic approach two-degree-of-freedom model. proposed requires only vibration response as input data. performance was assessed by theoretically and experimentally testing identifier at different shaft frequencies and, experimental test, that has hydrodynamic hydrostatic characteristics support pressure 10 psi considered. working fluid Chevron GST 32 oil. results show negligible differences between rotor those obtained numerically using identified bearing. addition, it observed determines parameters time less than 0.2 s. can be used other types bearings, which great advantage over identifiers.