IWSHM 2017: Vibration-based damage localization and estimation via the stochastic functional model-based method: An overview

John S Sakellariou; Spilios D Fassois; Christos S Sakaris

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IWSHM 2017: Vibration-based damage localization and estimation via the stochastic functional model-based method: An overview

机译：IWSHM 2017：通过基于随机功能模型的方法进行基于振动的损伤定位和估计：概述

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摘要

The functional model–based method is a unique vibration-based approach to damage localization and magnitude estimation in structures under normal operation, capable of operating on naturally arising random vibration signals without human intervention. It employs an innovative data-based stochastic functional model representing the partial dynamics under various damage scenarios, estimation techniques, and statistical hypothesis testing. Unlike alternative vibration methods employing data-based models but treat the localization and magnitude estimation approximately, as classification problems, it handles them properly as estimation problems. Among its remarkable properties is its ability to operate with a low number of vibration response sensors and low- and limited-frequency bandwidth, characteristics important in many applications. In this article, an overview of the method and its principles are presented, along with three validation case studies.

机译：基于功能模型的方法是一种基于振动的独特方法，可以在正常操作下对结构进行损伤定位和震级估计，无需人工干预即可对自然产生的随机振动信号进行操作。它采用了一种创新的基于数据的随机功能模型，该模型表示了在各种损坏情况下的局部动力学，估计技术和统计假设检验。与采用基于数据的模型的替代振动方法不同，但将定位和幅值估计近似作为分类问题，将其作为估计问题正确处理。它的显着特性之一是它能够与少量的振动响应传感器一起工作，并具有低频和有限的频率带宽，这在许多应用中都很重要。本文对方法及其原理进行了概述，并提供了三个验证案例研究。

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来源
《Structural health monitoring》 |2018年第6期|1335-1348|共14页
作者
John S Sakellariou; Spilios D Fassois; Christos S Sakaris;
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作者单位

Stochastic Mechanical Systems & Automation (SMSA) Laboratory, Department of Mechanical Engineering & Aeronautics, University of Patras;

Stochastic Mechanical Systems & Automation (SMSA) Laboratory, Department of Mechanical Engineering & Aeronautics, University of Patras;

Stochastic Mechanical Systems & Automation (SMSA) Laboratory, Department of Mechanical Engineering & Aeronautics, University of Patras;

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原文格式 PDF
正文语种 eng
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关键词
Vibration signals; structural health monitoring; damage localization; damage estimation; functional models; random vibration; ARX models;

机译：振动信号;结构健康监测;损伤定位;损伤估计;功能模型;随机振动;ARX模型;

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IWSHM 2017: Vibration-based damage localization and estimation via the stochastic functional model-based method: An overview

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