Vibration based damage detection using large array sensors and spatial filters

被引：71

作者：

Deraemaeker, Arnaud ^{[1
]}

Preumont, Andre ^{[1
]}

机构：

[1] Univ Libre Bruxelles, Act Struct Lab, B-1050 Brussels, Belgium

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2006年 / 20卷 / 07期

关键词：

health monitoring; sensor array; damage detection; spatial filtering; environmental conditions;

D O I：

10.1016/j.ymssp.2005.02.010

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, a novel approach for vibration based damage detection is proposed. The approach relies on the use of a large network of sensors (possibly hundreds of them) to which a programmable linear combiner is attached. The linear combiner is programmed to work as a modal filter. The frequency content of the output of the modal filter is proposed as feature for damage detection. It is shown that if a local damage is present, spurious peaks appear in the FRF of the modal filter whereas if temperature changes are considered, the FRF of the modal filter is shifted but its shape remains unchanged. The approach is interesting because of the ability to differentiate between local damage and global environmental changes to a structure. Issues about the practical implementation of the method are discussed. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1615 / 1630

页数：16

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