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In this work, the nonlinear modelling and analy-sis of an AMB system, based on the MBC500 Rotor Dynamics from Launchpoint Technologies, is presented. This approach is based on the harmonic domain linearization of the AMB system around a nonlinear stationary solution, under different rotating speeds. The nonlinear nature of the response appears at high speeds, due to the large oscillations introduced by the shaft unbalance. Using the presented methodology, low frequency gain loss is detected when increasing the rotating speed. This phenomenon causes the instability of the system, leading to destructive crashes.

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Booktitle: Proceedings of ISMB10