| Autor: |
Aly El-Shafei, A. S. Dimitri, M. El-Hakim, T. Saqr |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Proceedings of the 9th IFToMM International Conference on Rotor Dynamics ISBN: 9783319065892 |
| DOI: |
10.1007/978-3-319-06590-8_94 |
| Popis: |
This paper discusses the development of a novel bearing the Smart Electro-Magnetic Actuator Journal Integrated Bearing (SEMAJIB). The SEMAJIB is essentially a journal bearing with an electro-magnetic actuator all flooded in oil. The basic principle is that the rotor is carried on the journal bearing, and the electro-magnetic actuator is used to control the journal bearing instability. The paper discusses the design of the SEMAJIB and the design of a test rig including a multi-mode rotor. System identification of the test rig including the rotor and the bearings is discussed in detail. This includes the free-free rotor identification, and the identification of the rotor supported on the SEMAJIB bearings as well as the magnetic actuator testing. The effect of misalignment on the system characteristics is illustrated. The test rig is then used to study the dynamics of the controlled SEMAJIB. The rotor system is essentially running on the journal bearing until the instability occurs, the electro-magnetic actuator is then applied by PD control to eliminate the instability, basically adding damping. The rotor can then transgress the instability threshold and operate smoothly at higher speeds. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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