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Application of fibre Bragg grating sensors for structural health monitoring of an adaptive wing

机译：布拉格光纤光栅传感器在自适应机翼结构健康监测中的应用

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摘要

This paper presents the concept of application of fibre Bragg grating (FBG) sensors for structural health monitoring (SHM) of an adaptive wing. In this concept, the shape of the wing is controlled and altered due to the wing design and the use of integrated shape memory alloy (SMA) actuators. FBG sensors are great tools for controlling the condition of composite structures due to their immunity to electromagnetic fields as well as their small size and weight. They can be mounted onto the surface or embedded into the wing skin without any significant influence on the wing strength. In the first part of the paper a determination of the twisting moments produced by activation of the SMA actuators is presented. As a first step, a numerical analysis using a finite element method (FEM) commercial code ABAQUS~? is presented. Then a comparison between strain values measured by FBG sensors and determined numerically is used for determination of the real value of the activation moment of every SMA actuator. Two types of damage scenarios are analysed and discussed in the paper. The first scenario is reduction of the twisting moment values produced by one of the SMA actuators. The second scenario is outer skin damage. In both damage scenarios, a neural network is used for damage detection and localization.
机译：本文提出了光纤布拉格光栅（FBG）传感器在自适应机翼结构健康监测（SHM）中的应用概念。在此概念中，机翼的形状因机翼设计和集成形状记忆合金（SMA）致动器的使用而受到控制和更改。 FBG传感器对电磁场具有免疫力，而且体积小，重量轻，是控制复合结构状况的好工具。它们可以安装在表面上或嵌入机翼蒙皮，而对机翼强度没有任何重大影响。在本文的第一部分中，介绍了通过激活SMA执行器产生的扭转力矩的确定方法。第一步，使用有限元方法（FEM）商业代码ABAQUS〜？进行数值分析。被表达。然后，将由FBG传感器测量并通过数值确定的应变值之间的比较用于确定每个SMA执行器的激活力矩的实际值。本文分析和讨论了两种类型的破坏情景。第一种情况是降低其中一个SMA执行器产生的扭矩值。第二种情况是皮肤外伤。在两种损坏情况下，都使用神经网络进行损坏检测和定位。

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