Identification Techniques in Rotordynamics

  • R. Nordmann
Part of the International Centre for Mechanical Sciences book series (CISM, volume 352)


In order to find out the condition of a rotating machine during operation usually vibrations (output signals) are measured at specified machine locations. Indications can be determined from these signals, which allow a diagnosis of possible failures (fault parameters) based on the support of expert knowledge and/or good rotordynamic models. However, the success of failure diagnostic would probably be much better, if in addition to the output signals more information would be available about rotor excitation forces. This leads to the idea of using Identification Techniques with measured input and output signals. Frequency response functions can than be calculated and an extraction of physical and/or modal parameters, expressing the actual system condition, is possible. This contribution describes the basic relations of Identification Techniques in rotordynamics, including rotordynamic models, measurement and excitation methods and parameter estimation procedures. Some applications of parameter identification are presented together with the corresponding test procedures and test apparatus.


Identification Technique Modal Parameter Frequency Response Function Fault Parameter Magnetic Bearing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Wien 1994

Authors and Affiliations

  • R. Nordmann
    • 1
  1. 1.University of KaiserslauternKaiserslauternGermany

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