Operational modal analysis based on power spectral density transmissibility functions (PSDT) is a powerful tool to identify the modal parameters with low sensitivity to excitations. The rotor systems may have the asymmetric damping or stiffness matrices which can lead to increase the difficulties of the identification procedure. In this paper, a new method is proposed to identify the modal parameters of the asymmetric rotary systems by the operational modal analysis based on the power spectral density transmissibility functions. For pole extraction from the PSDT function, a proper parametric identification method such as the Poly-reference Least Squares Complex Frequency-domain method (PLSCF) or poly-Max method can be used. Then, the rotary system poles can be identified from a Stabilization Diagram (SD) with overestimating the system model order. The proposed algorithm is validated by a computer simulation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Modal Parameter Identification of Rotary Systems Based on Power Spectral Density Transmissibility Functions


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    WCX World Congress Experience ; 2018



    Publication date :

    2018-04-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    Deriving Transmissibility Functions with Finite Elements for Specifications

    Guthrie, Michael / Ross, Michael R. / Pulling, Eric | AIAA | 2021



    DERIVING TRANSMISSIBILITY FUNCTIONS WITH FINITE ELEMENTS FOR SPECIFICATION

    Guthrie, Michael / Ross, Michael R. / Pulling, Eric | TIBKAT | 2021