Abstract
Measured and simulated orbits of the rotor deflection and bearing forces are applied to understand and separate the effects of multiple, simultaneous errors. Hereto, the paper firstly defines a clear terminology which is mandatory when dealing with multiple errors. The physics and mathematical descriptions of several errors are summarized and illustrated for the Jeffcott rotor model. Furthermore, a short introduction to orbit dynamics is given including force orbits.
Based on these fundamentals, the authors present the theoretics of an online roundness error identification method. This method uses a Fourier decomposition for reconstruction the different components. One example recorded at an academic rotor test rig proves these methods.
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This work was supported by the ‘Deutsche Forschungsgemeinschaft’ (DFG) under grant UL105/37-2.
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Thuemmel, T., Rossner, M., Wagner, C., Maierhofer, J., Rixen, D. (2019). Rotor Orbits at Operation Speed and Model-Based Diagnosis of Multiple Errors. In: Cavalca, K., Weber, H. (eds) Proceedings of the 10th International Conference on Rotor Dynamics – IFToMM . IFToMM 2018. Mechanisms and Machine Science, vol 61. Springer, Cham. https://doi.org/10.1007/978-3-319-99268-6_16
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