Identifying physical parameters of structural dynamical system using Padé approximation

Zhi Chun Yang; Yun Ting Ding; Le Wang

doi:10.16385/j.cnki.issn.1004-4523.2016.01.004

Identifying physical parameters of structural dynamical system using Padé approximation

Zhi Chun Yang, Yun Ting Ding, Le Wang

School of Aeronautics

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

A new identification method for the physical parameters of structural dynamical system is proposed. The Padé approximants is used to fit the dynamic stiffness curve of the structural dynamical system, and the coefficient matrices in the Padé polynomial are determined by the least squares method. In addition, genetic algorithms is adopted to optimize the parameters in Padé polynomial. Then the mass, damping and stiffness matrices in the physical space can be extracted from the Padé polynomial. Numerical examples illustrate that the proposed method has good accuracy and is effective for viscous or non-viscous damped systems.

Original language	English
Pages (from-to)	24-30
Number of pages	7
Journal	Zhendong Gongcheng Xuebao/Journal of Vibration Engineering
Volume	29
Issue number	1
DOIs	https://doi.org/10.16385/j.cnki.issn.1004-4523.2016.01.004
State	Published - 1 Feb 2016

Keywords

Least squares method
Padé approximants
Parameters identification
Structural dynamical system
System identification

Access to Document

10.16385/j.cnki.issn.1004-4523.2016.01.004

Cite this

@article{c0649e54a4ee4e4da3b7def0bffc748b,

title = "Identifying physical parameters of structural dynamical system using Pad{\'e} approximation",

abstract = "A new identification method for the physical parameters of structural dynamical system is proposed. The Pad{\'e} approximants is used to fit the dynamic stiffness curve of the structural dynamical system, and the coefficient matrices in the Pad{\'e} polynomial are determined by the least squares method. In addition, genetic algorithms is adopted to optimize the parameters in Pad{\'e} polynomial. Then the mass, damping and stiffness matrices in the physical space can be extracted from the Pad{\'e} polynomial. Numerical examples illustrate that the proposed method has good accuracy and is effective for viscous or non-viscous damped systems.",

keywords = "Least squares method, Pad{\'e} approximants, Parameters identification, Structural dynamical system, System identification",

author = "Yang, {Zhi Chun} and Ding, {Yun Ting} and Le Wang",

year = "2016",

month = feb,

day = "1",

doi = "10.16385/j.cnki.issn.1004-4523.2016.01.004",

language = "英语",

volume = "29",

pages = "24--30",

journal = "Zhendong Gongcheng Xuebao/Journal of Vibration Engineering",

issn = "1004-4523",

publisher = "Nanjing University of Aeronautics an Astronautics",

number = "1",

}

TY - JOUR

T1 - Identifying physical parameters of structural dynamical system using Padé approximation

AU - Yang, Zhi Chun

AU - Ding, Yun Ting

AU - Wang, Le

PY - 2016/2/1

Y1 - 2016/2/1

N2 - A new identification method for the physical parameters of structural dynamical system is proposed. The Padé approximants is used to fit the dynamic stiffness curve of the structural dynamical system, and the coefficient matrices in the Padé polynomial are determined by the least squares method. In addition, genetic algorithms is adopted to optimize the parameters in Padé polynomial. Then the mass, damping and stiffness matrices in the physical space can be extracted from the Padé polynomial. Numerical examples illustrate that the proposed method has good accuracy and is effective for viscous or non-viscous damped systems.

AB - A new identification method for the physical parameters of structural dynamical system is proposed. The Padé approximants is used to fit the dynamic stiffness curve of the structural dynamical system, and the coefficient matrices in the Padé polynomial are determined by the least squares method. In addition, genetic algorithms is adopted to optimize the parameters in Padé polynomial. Then the mass, damping and stiffness matrices in the physical space can be extracted from the Padé polynomial. Numerical examples illustrate that the proposed method has good accuracy and is effective for viscous or non-viscous damped systems.

KW - Least squares method

KW - Padé approximants

KW - Parameters identification

KW - Structural dynamical system

KW - System identification

UR - http://www.scopus.com/inward/record.url?scp=84961695970&partnerID=8YFLogxK

U2 - 10.16385/j.cnki.issn.1004-4523.2016.01.004

DO - 10.16385/j.cnki.issn.1004-4523.2016.01.004

M3 - 文章

AN - SCOPUS:84961695970

SN - 1004-4523

VL - 29

SP - 24

EP - 30

JO - Zhendong Gongcheng Xuebao/Journal of Vibration Engineering

JF - Zhendong Gongcheng Xuebao/Journal of Vibration Engineering

IS - 1

ER -

Identifying physical parameters of structural dynamical system using Padé approximation

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this