Title | ||
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Operational modal analysis for slow linear time-varying structures based on moving window second order blind identification. |
Abstract | ||
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Second order blind identification (SOBI) attracts widespread attention and becomes a promising method for the estimation of operational modal parameters. However, it is a statistical modal analysis method and only suited for time invariant operational modal parameters identification of stationary random vibration response signal from linear time invariant (LTI) structures. In consideration of non-stationary random vibration response signal from linear time variant (LTV) structures, a new algorithm based on moving-window second order blind identification (MWSOBI) is presented for time-varying transient operational modal parameters identification for LTV structures. After the appropriate size of moving window had been selected, the time-varying transient modal frequencies and mode shapes could be identified effectively only from non-stationary vibration response signals. The simulation results of mass time-varying three-degree-of-freedom (DOF) and cantilever beam prove that this new method can identify the modal shapes and natural frequencies of LTV structure only from non-stationary vibration response signals and the performance of identification is much better than moving window independent component analysis (ICA). |
Year | DOI | Venue |
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2017 | 10.1016/j.sigpro.2016.10.016 | Signal Processing |
Keywords | Field | DocType |
Operational modal analysis,Time-varying transient,Linear time-varying structure,Second order blind identification,Moving-window,Independent component analysis | Modal analysis using FEM,LTI system theory,Operational Modal Analysis,Modal testing,Control theory,Vibration,Mathematics,Modal,Random vibration,Modal analysis | Journal |
Volume | Issue | ISSN |
133 | C | 0165-1684 |
Citations | PageRank | References |
1 | 0.36 | 3 |
Authors | ||
3 |
Name | Order | Citations | PageRank |
---|---|---|---|
Cheng Wang | 1 | 34 | 4.60 |
Jianying Wang | 2 | 1 | 0.70 |
Tianshu Zhang | 3 | 1 | 0.70 |