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Real-time monitoring method of damage growth based on fcm algorithm under the influence of time-varying temperature

A real-time monitoring and algorithm technology, applied in the direction of computing, measuring devices, computer components, etc., to achieve the effects of strong feasibility, safety assurance, and pressure relief

Active Publication Date: 2019-07-23
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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  • Real-time monitoring method of damage growth based on fcm algorithm under the influence of time-varying temperature
  • Real-time monitoring method of damage growth based on fcm algorithm under the influence of time-varying temperature
  • Real-time monitoring method of damage growth based on fcm algorithm under the 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 real-time monitoring method for damage expansion based on the fuzzy C-means (FCM) algorithm under the influence of time-varying temperature, which can effectively solve the influence of changing factors only by relying on the distribution characteristics of the signal itself, and can effectively detect the damage under the influence of temperature changes. On-line monitoring of the damage expansion trend of the structure. The offset index used in the present invention can effectively monitor the change trend of damage expansion in real time, and can also provide certain basis for the quantification of damage expansion. The invention does not need to change or add equipment and parameters in the realization process, and can be realized by using the existing hardware system, has strong feasibility, short algorithm operation time, high accuracy and easy operation. Other data sets and motion data update strategies have also played a huge role in online real-time damage monitoring, ensuring the real-time performance of online updates and reducing the demand for all historical data, relieving the pressure on data storage, and having good practicality. engineering value.

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 Patents(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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