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

2018-01-1107

04/03/2018

Features
Event
WCX World Congress Experience
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2018-01-1107
Pages
6
Citation
Khodaygan, S., "Modal Parameter Identification of Rotary Systems Based on Power Spectral Density Transmissibility Functions," SAE Technical Paper 2018-01-1107, 2018, https://doi.org/10.4271/2018-01-1107.
Additional Details
Publisher
Published
Apr 3, 2018
Product Code
2018-01-1107
Content Type
Technical Paper
Language
English