FCM algorithm-based method for real-time monitoring of damage expansion under influence of time-varying temperature

A real-time monitoring and algorithm technology, applied in the direction of calculation, measurement device, computer parts, etc., to achieve the effect of good actual engineering value, ensure safety, and relieve pressure

Active Publication Date: 2017-11-21
XIAMEN UNIV
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Problems solved by technology

At present, some structural health monitoring methods based on cluster analysis have been used for damage identification, but they are only used to judge whether damage has occurred, and there is no damage and its expansion for further judgment

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  • FCM algorithm-based method for real-time monitoring of damage expansion under influence of time-varying temperature
  • FCM algorithm-based method for real-time monitoring of damage expansion under influence of time-varying temperature
  • FCM algorithm-based method for real-time monitoring of damage expansion under influence of time-varying temperature

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0045]In order to solve various deficiencies in the prior art, the present invention provides a damage expansion real-time monitoring method based on the FCM algorithm under the influence of time-varying temperature, based on the fuzzy C-means (FCM) algorithm, and the FCM algorithm is a kind of The fuzzy clustering algorithm has short running time and high accuracy. The real distribution of the data set can be best described by the fuzzy C-means algorithm, and the damage expansion process can be monitored through the deviation of the data set distribution.

[0046] The method of the invention monitors the damage extension through the change of the real-time algorithm result in the damage extension process under the influence of the temperature change. Such as figure 1 Therefore, the brief process of the present invention is as follows: first ...

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Abstract

The invention relates to a fuzzy C-means (FCM) algorithm-based method for real-time monitoring of damage expansion under the influence of a time-varying temperature. The method can effectively solve the influences of changing factors only depending on the distribution characteristics of a signal, and can realize effective online monitoring of the change trend of the damage expansion of a structure under the influence of the temperature. The change trend of the damage expansion can be effectively monitored in real time through a shift index, and a certain basis is provided for the quantification of the damage expansion. The method can realize the monitoring through using an existing hardware system without changing or increasing devices and parameters in the realization process, and has the advantages of high feasibility, short algorithm operation time, high accuracy, and easiness in operation. A strategy for waiting the updating of data sets and motion data plays a great role in online real-time damage monitoring, ensures the online updating real-time property, reduces the demand of all historical data, eases the data storage pressure and has very good practical engineering values.

Description

technical field [0001] The invention relates to a damage extension monitoring method, in particular to a damage extension real-time monitoring method based on an FCM algorithm under the influence of time-varying temperature. Background technique [0002] The structure of the aircraft is easily affected by factors such as external loads and temperatures during operation, resulting in damage. The non-destructive testing technology in the prior art can play a certain role in the damage detection of the aircraft, but it has great limitations, it is difficult to detect the damage of hidden parts, and the cost is relatively high. [0003] Aircraft structural health monitoring technology is an advanced sensor network integrated on the structure, which can obtain information related to the health status of the structure online in real time, and combine advanced signal processing methods to extract features related to structural damage and realize the health status. diagnosis, asses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/44G06K9/62
CPCG01N29/4472G01N2291/023G06F18/23
Inventor 卿新林徐誉孙虎王奕首
Owner XIAMEN UNIV
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