A New Approach for Vibration-based Rolling Bearings Fault Detection in Non-Stationary Operating Conditions


Golafshan R., Wegerhoff M., Jacobs G., Şanlıtürk K. Y.

VDI Conference Oscillations 2017: Calculation, Monitoring, Application, Nurtingen, Almanya, 10 - 11 Ekim 2017, cilt.2295, ss.347-361 identifier

  • Cilt numarası: 2295
  • Basıldığı Şehir: Nurtingen
  • Basıldığı Ülke: Almanya
  • Sayfa Sayıları: ss.347-361

Özet

Torsional vibrations may arise in many mechanical engineering applications, and cause a high level of complexities and non-stationarities accordingly. The present study proposes a new signal processing method based on the Recursive Autocorrelation (RAC) function, which can be considered as a reliable fault detection algorithm for rolling bearings in non-stationary operating conditions caused by torsional vibrations. The effectiveness and sensitivities of the proposed method are assessed using experimental data captured from a test rig designed for this purpose. Moreover, a numerically-generated vibration signal model for faulty rolling bearings with a shaft subjected to the twisting oscillations (i.e. torsional vibrations) is also proposed. In addition to the experimental studies, the proposed RAC-based methodology is examined numerically using the proposed signal model. As a result of this work, it is observed that the adverse effects of torsional vibrations in the field of bearing fault detection can be controlled using the RAC-based methodology. Both the experimental and the numerical results presented here confirm the computational advantages of RAC over the available order tracking-based approaches.