Bridge monitoring data modal identification method and device

A technology for monitoring data and modal recognition, applied in character and pattern recognition, electrical digital data processing, special data processing applications, etc. Interference and other problems, to achieve the effect of eliminating unimportant modes, avoiding pseudo mode interference, and improving running speed

Active Publication Date: 2019-11-19
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Problems solved by technology

[0004]The decomposition of high-dimensional matrices requires a lot of memory and computing time, which makes it unsuitable for situations where large amounts of data need to be processed or high computational efficiency is required
Secondly, when using subspace identification technology to extract mod...

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  • Bridge monitoring data modal identification method and device
  • Bridge monitoring data modal identification method and device
  • Bridge monitoring data modal identification method and device

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] figure 1 It is a schematic flow chart of the bridge monitoring data mode recognition method described in an embodiment of the present invention, as figure 1 shown, including:

[0044] Step S1, simplifying the original Hankel matrix to obtain a simplified Hankel matrix;

[0045] Step S2, creating an autocorrelation matrix according to the...

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Abstract

The embodiment of the invention provides a bridge monitoring data modal identification method and device, and the method comprises the steps: simplifying an original Hankel matrix, and obtaining a simplified Hankel matrix; creating an autocorrelation matrix according to the simplified Hankel matrix; determining a modal order according to the autocorrelation matrix; calculating a projection matrixaccording to the simplified Hankel matrix, and weighting the projection matrix to obtain a weighted projection matrix; singular value decomposition and the modal order are carried out on the weightedprojection matrix to obtain an observable matrix; and identifying modal parameters according to the observable matrix. An autocorrelation matrix is created through the simplified Hankel matrix, and the model order is accurately selected by utilizing the relative difference between eigenvalues of the autocorrelation matrix, so that an unimportant mode in an estimation result is eliminated, and pseudo-mode interference caused by noise and calculation errors is avoided.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a mode recognition method and device for bridge monitoring data. Background technique [0002] The bridge deck on the bridge will be damaged to varying degrees over time. Crack damage can be directly observed with the eyes, but if there is damage inside the bridge deck, it is difficult to observe. If it is not treated in time, Dangers can easily occur, so bridge inspection is very important. [0003] The most important content of bridge detection is to identify bridge loss or deterioration degree through monitoring data. The modal parameter identification of bridge monitoring data is one of the key links to determine the damage location and damage degree of the bridge and accurately evaluate the remaining life. The data-driven random subspace identification algorithm in technology is one of the two implementations of random subspace identification. The algorithm uses...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06K9/00
CPCG06V10/94
Inventor 刘祥磊王培培黄祎萌王辉姜孟卓
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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