Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2004.11a
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- Pages.677-684
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- 2004
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- 1598-2548(pISSN)
A Study on the Dynamic Characteristics of Air Foil Bearings Using LS(Least Square)/IV(Instrumental Variable) Method
LS/IV 기법을 이용한 공기 포일 베어링의 동특성 계수에 관한 연구
Abstract
This paper describes a method for identifying the dynamic characteristics of air foil bearings for high speed turbomachinerys with the LS/IV method. In fact identifying the characteristics of air foil bearings is very difficult work, and it is tried to identify it. Experiments were conducted to determine the structural dynamic and hydrodynamic characteristics of air foil bearings. Numerical predictions compare the static and dynamic force performances. The housing of the bearing on the journal was driven by the impact hammer which were used to simulate impact force acting on air foil bearings. The characteristics of air foil bearings were extracted from the frequency response function (FRF) by LS(Least Square) method and IV(Instrumental Variable) method. The experiment was tested at 0 rpm and
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