System and method for automated extraction of high resolution structural dynamics from video

Title: System and method for automated extraction of high resolution structural dynamics from video

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Abstract

A method for extracting vibrational modes of a structure includes: receiving a plurality of video frames, each of the video frames including a plurality of pixels; decomposing each of the video frames on a plurality of spatial scales in accordance with complex steerable pyramid filters to obtain a filter response for each of the spatial scales; computing a plurality of local phases of the pixels of each frame; removing a temporal mean from each frame to obtain a plurality of factored vibration motion functions; performing principal component analysis on the factored vibration motion functions to obtain principal components; blind source separating the principal components to compute a plurality of modal coordinates; computing frequency and damping ratios in accordance with the modal coordinates; and outputting the computed frequency and damping ratios.

Inventors:: Yang, Yongchao; Kenyon, Garrett; Farrar, Charles; Mascarenas, David

Issue Date:: 2020-02-18

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1632585

Patent Number(s):: 10,567,655

Application Number:: 15/708,986

Assignee:: Triad National Security, LLC (Los Alamos, NM)

DOE Contract Number:: AC52-06NA25396

Resource Type:: Patent

Resource Relation:: Patent File Date: 09/19/2017

Country of Publication:: United States

Language:: English

Citation Formats


                    Yang, Yongchao, Kenyon, Garrett, Farrar, Charles, and Mascarenas, David. System and method for automated extraction of high resolution structural dynamics from video.  United States: N. p., 2020. 
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                    Yang, Yongchao, Kenyon, Garrett, Farrar, Charles, & Mascarenas, David. System and method for automated extraction of high resolution structural dynamics from video.  United States.

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                    Yang, Yongchao, Kenyon, Garrett, Farrar, Charles, and Mascarenas, David. Tue .  
        "System and method for automated extraction of high resolution structural dynamics from video".  United States.  https://www.osti.gov/servlets/purl/1632585.

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@article{osti_1632585,

  title        = {System and method for automated extraction of high resolution structural dynamics from video},

  author       = {Yang, Yongchao and Kenyon, Garrett and Farrar, Charles and Mascarenas, David},

  abstractNote = {A method for extracting vibrational modes of a structure includes: receiving a plurality of video frames, each of the video frames including a plurality of pixels; decomposing each of the video frames on a plurality of spatial scales in accordance with complex steerable pyramid filters to obtain a filter response for each of the spatial scales; computing a plurality of local phases of the pixels of each frame; removing a temporal mean from each frame to obtain a plurality of factored vibration motion functions; performing principal component analysis on the factored vibration motion functions to obtain principal components; blind source separating the principal components to compute a plurality of modal coordinates; computing frequency and damping ratios in accordance with the modal coordinates; and outputting the computed frequency and damping ratios.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2020},

  month        = {2}

}

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