Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sensor arrangement method for reducing structural inherent frequency recognition uncertainty

A technology of natural frequency and uncertainty, applied in the field of sensors, can solve the problems of not considering the influence of frequency parameter identification, unsuitable structural natural frequency identification, etc., to reduce adverse effects, reduce uncertainty, and improve accuracy Effect

Inactive Publication Date: 2021-07-23
YANCHENG INST OF TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 frequency parameters, and is not suitable for the identification of structural natural frequencies

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sensor arrangement method for reducing structural inherent frequency recognition uncertainty
  • Sensor arrangement method for reducing structural inherent frequency recognition uncertainty
  • Sensor arrangement method for reducing structural inherent frequency recognition uncertainty

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The present invention uses the posterior probability density function of structural frequency parameters to describe the uncertainty of natural frequency identification; proposes an information entropy criterion to quantify the uncertainty of natural frequency parameter identification; based on the numerical value of the information entropy criterion, the utilization order Algorithms to guide the placement of sensors. Considering the identification of frequency 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 frequency parameter, the theoretical connection between the sensor arrangement and the identif...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a sensor arrangement method for reducing structural inherent frequency recognition uncertainty, which is used for civil engineering structure health monitoring and is characterized by comprising the following steps: arranging a posterior probability density function of inherent frequency and a sensor based on information entropy; the posterior probability density function of the inherent frequency is used for describing the uncertainty of inherent frequency recognition; according to the sensor arrangement based on the information entropy, an information entropy criterion is put forward to quantify uncertainty of inherent frequency parameter recognition, and arrangement of the sensors is guided through the information entropy criterion by using a sequential 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 natural frequency identification in civil engineering structure health monitoring. Background technique [0002] The natural frequency of the structure directly reflects the dynamic characteristics of the structure. When evaluating the performance of the structure, it is necessary to analyze whether the structure is damaged according to the change of the natural frequency of the structure. When using the measurement data to identify the natural frequency of the structure, due to the existence of measurement noise, the frequency parameters obtained from the measurement data will deviate from the real frequency parameters of the structure. Through different segmental sampling data, multiple natural frequency identifications will get different results. The difference between different frequency ident...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F17/14G06F17/16G06F111/08
CPCG06F30/23G06F17/141G06F17/16G06F2111/08
Inventor 裴雪扬尹明干石飞停杜玉兵
Owner YANCHENG INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com