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A nonlinear characteristic quantity analysis approach for distinguishing system chaos and nonlinear properties, complexity, is proposed and applied to rotor system with rub-impact at fixed limiters and oil whip fault diagnosis in this paper. Firstly, the theory and algorithm of complexity is introduced. And then combining with model, we utilize the approach together with Poincaré map to analyze two...
In this paper a finite element (FE) model of dual-span rotor system with rub-impact at fixed limiter is established. The system motion characteristics in different rotating speeds and rub-impact rod stiffness are investigated numerically by using Hilbert-Huang transform, a relative novel time-frequency analysis method. The results show that the effects of variables on system motion patterns, response...
The paper presents a relative novel time-frequency analysis method which applies in the vibration Fault analysis of rotor systems through Hilbert spectral analysis (HSA), the part of the Hilbert-Huang transform. Using this method we analyze the vibration fault characteristics of the rotor system with rub-impact by compared with non-rubbing rotor system both in experiment and simulation. Firstly, a...
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