Model-based condition monitoring of an auxiliary bearing following contact events

L. Ginzinger, M. N. Sahinkaya, T. Schindler, H. Ulbrich, P. Keogh

Research output: Contribution to conferencePaper

4 Citations (Scopus)
49 Downloads (Pure)

Abstract

Auxiliary bearings are used in many rotor systems, e.g. those with active magnetic bearings. In a case of a contact with the auxiliary bearing, high impact forces and wear are possible. Therefore the auxiliary bearings have to be replaced after a certain number of contact events. This is very costly and often needs complete dismantling of the rotor system. In this paper a concept for model based condition monitoring of an auxiliary bearing is developed. The rotor system is modeled in a multibody simulation environment, including the contact to the auxiliary bearing and various fault parameters. After contact (drop or bouncing contact) occurs in the real rotor system, an identification algorithm analyses the measuremental data of the contact event and determines the fault which occurred. Based on the results of the identification algorithm, an optimization tool aligns the rotor simulation with the measurement by varying the fault parameters. After the alignment of the simulation, the simulation results are evaluated. The contact forces are evaluated against location on the surface of the auxiliary bearing and are stored. This procedure is performed after each contact event. Hence, a weighting of the load over the surface of the auxiliary bearing is gained. Depending on the material and structure, these data can be used for a life-time estimation of the auxiliary bearing. Using an active magnetic bearing test facility, the monitoring system has been successfully tested.

Original languageEnglish
Publication statusPublished - 2014
Event10th International Conference on Motion and Vibration Control, MOVIC 2010 - Tokyo, UK United Kingdom
Duration: 17 Aug 201020 Aug 2010

Conference

Conference10th International Conference on Motion and Vibration Control, MOVIC 2010
CountryUK United Kingdom
CityTokyo
Period17/08/1020/08/10

Keywords

  • Auxiliary bearings
  • Condition monitoring
  • Contact
  • Model-based monitoring
  • Multibody simulation
  • Non-smooth mechanics
  • Unilateral contact

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