Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain

Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain

Real-time estimation of modal parameters of time-varying structures can conduct an obvious contribution to some specific applications in structural dynamic area, such as health monitoring, damage detection, and vibration control; the recursive algorithm of modal parameter estimation supplies one of...

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Main Authors: Si-Da Zhou, Li Liu, Wu Yang, Zhi-Sai Ma
Format: Article
Language:English
Published: Hindawi Limited 2015-01-01
Series:Shock and Vibration
Online Access:http://dx.doi.org/10.1155/2015/397364
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spelling doaj-c293895c5500466eb439c9c13fa50f8c2020-11-24T21:27:36ZengHindawi LimitedShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/397364397364Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency DomainSi-Da Zhou0Li Liu1Wu Yang2Zhi-Sai Ma3School of Aerospace Engineering, Beijing Institute of Technology, Zhongguancun South Street 5, Qiushi Building 312, Beijing 100081, ChinaSchool of Aerospace Engineering, Beijing Institute of Technology, Zhongguancun South Street 5, Qiushi Building 312, Beijing 100081, ChinaSchool of Aerospace Engineering, Beijing Institute of Technology, Zhongguancun South Street 5, Qiushi Building 312, Beijing 100081, ChinaSchool of Aerospace Engineering, Beijing Institute of Technology, Zhongguancun South Street 5, Qiushi Building 312, Beijing 100081, ChinaReal-time estimation of modal parameters of time-varying structures can conduct an obvious contribution to some specific applications in structural dynamic area, such as health monitoring, damage detection, and vibration control; the recursive algorithm of modal parameter estimation supplies one of fundamentals for acquiring modal parameters in real-time. This paper presents a vector multistage recursive method of modal parameter estimation for time-varying structures in hybrid time and frequency domain, including stages of recursive estimation of time-dependent power spectra, frozen-time modal parameter estimation, recursive modal validation, and continuous-time estimation of modal parameters. An experimental example validates the proposed method finally.http://dx.doi.org/10.1155/2015/397364
collection DOAJ
language English
format Article
sources DOAJ
author Si-Da Zhou
Li Liu
Wu Yang
Zhi-Sai Ma
spellingShingle Si-Da Zhou
Li Liu
Wu Yang
Zhi-Sai Ma
Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain
Shock and Vibration
author_facet Si-Da Zhou
Li Liu
Wu Yang
Zhi-Sai Ma
author_sort Si-Da Zhou
title Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain
title_short Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain
title_full Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain
title_fullStr Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain
title_full_unstemmed Operational Modal Identification of Time-Varying Structures via a Vector Multistage Recursive Approach in Hybrid Time and Frequency Domain
title_sort operational modal identification of time-varying structures via a vector multistage recursive approach in hybrid time and frequency domain
publisher Hindawi Limited
series Shock and Vibration
issn 1070-9622
1875-9203
publishDate 2015-01-01
description Real-time estimation of modal parameters of time-varying structures can conduct an obvious contribution to some specific applications in structural dynamic area, such as health monitoring, damage detection, and vibration control; the recursive algorithm of modal parameter estimation supplies one of fundamentals for acquiring modal parameters in real-time. This paper presents a vector multistage recursive method of modal parameter estimation for time-varying structures in hybrid time and frequency domain, including stages of recursive estimation of time-dependent power spectra, frozen-time modal parameter estimation, recursive modal validation, and continuous-time estimation of modal parameters. An experimental example validates the proposed method finally.
url http://dx.doi.org/10.1155/2015/397364
work_keys_str_mv AT sidazhou operationalmodalidentificationoftimevaryingstructuresviaavectormultistagerecursiveapproachinhybridtimeandfrequencydomain
AT liliu operationalmodalidentificationoftimevaryingstructuresviaavectormultistagerecursiveapproachinhybridtimeandfrequencydomain
AT wuyang operationalmodalidentificationoftimevaryingstructuresviaavectormultistagerecursiveapproachinhybridtimeandfrequencydomain
AT zhisaima operationalmodalidentificationoftimevaryingstructuresviaavectormultistagerecursiveapproachinhybridtimeandfrequencydomain
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