Sensor arrangement method for reducing uncertainty of structural damping ratio identification

A technology of uncertainty and structural damping, applied in the field of sensors, can solve problems such as identification of structural damping ratios that are not considered and inapplicable, and achieve the effects of improving accuracy, reducing adverse effects, and reducing uncertainty

Pending Publication Date: 2021-07-23
YANCHENG INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the theoretical framework of these sensor arrangement methods does not consider the influence of error factors such as measurement noise on the identification of structural damping ratio parameters, and is not suitable for the identification of structural damping ratios.

Method used

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  • Sensor arrangement method for reducing uncertainty of structural damping ratio identification
  • Sensor arrangement method for reducing uncertainty of structural damping ratio identification
  • Sensor arrangement method for reducing uncertainty of structural damping ratio identification

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Embodiment 1

[0053] The present invention uses the posterior probability density function of structural damping ratio parameters to describe the uncertainty of damping ratio identification; proposes an information entropy criterion to quantify the uncertainty of damping ratio parameter identification; based on the numerical value of the information entropy criterion, using Sequential algorithm to guide sensor placement. Considering the identification of damping ratio parameters under the operating state of the structure, Gaussian noise is used for both environmental excitation and measurement noise. The sensor arrangement method proposed in the present invention is based on the Bayesian frequency domain modal recognition theory. By defining the selection matrix corresponding to the specific sensor position and constructing the posterior probability density function of the structural damping ratio parameter, the theoretical connection between the sensor arrangement and the identification of...

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Abstract

The invention relates to a sensor arrangement method for reducing structural damping ratio recognition uncertainty, which is used for civil engineering structure health monitoring and is characterized by comprising the steps that a posterior probability density function of a damping ratio and a sensor based on information entropy are arranged; the posterior probability density function of the damping ratio is used for describing the uncertainty of damping ratio identification; according to the sensor arrangement based on the information entropy, the uncertainty of damping ratio parameter identification is quantified according to the information entropy criterion, and arrangement of the sensors is guided through the information entropy criterion by means of a sequence algorithm.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a sensor arrangement method for reducing the uncertainty of structural damping ratio identification in civil engineering structure health monitoring. Background technique [0002] The structural damping ratio reflects the energy dissipation and shock absorption performance of the structure, which is reflected in the vibration attenuation process of the structure. When evaluating the performance of a structure, it is necessary to analyze the energy consumption of the structure based on the damping ratio of each order of the structure, and to judge the participation of high-order modes in vibration. During the operation of the structure, when using the measurement data to identify the damping ratio of each order of the structure, the measurement noise will cause the deviation between the identified damping ratio and the real damping ratio. Different sub-sampling data, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/025
Inventor 裴雪扬尹明干杜玉兵石飞停
Owner YANCHENG INST OF TECH
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