变形机翼柔性蒙皮形状光纤传感及重构方法

Optical fiber sensing and reconstruction method for morphing wing flexible skin shape

为解决变形机翼柔性蒙皮形状实时监测问题,研究柔性蒙皮形状光纤传感及重构方法。理论分析了光纤光栅波长漂移与柔性蒙皮弯曲曲率的关系以及基于曲率信息的插值曲面重构算法;建立了柔性蒙皮曲率标定实验系统,制备了两层硅橡胶间加入有机硅胶并布设光纤光栅传感器的柔性蒙皮;实验测量了不同曲率下不同样本之间的波长漂移,分析了光纤光栅波长漂移量与柔性蒙皮曲率的关系,采用插值算法重构出柔性蒙皮变形曲面,验证了变形机翼柔性蒙皮形状光纤传感实时监测的技术可行性。研究结果表明：光纤传感方法可用于柔性蒙皮形状实时感知,柔性变形可测量曲率范围不小于为25 m^（-1）,灵敏度可达28.07 pm/m^（-1）。光纤传感方法在变形机翼形状实时监测中具有应用前景。

In order to solve the problem of real-time monitoring of flexible skin shape of morphing wing,the fiber sensing and reconstruction method of flexible skin shape is studied.The relationship between the wavelength shift of fiber grating and the bending curvature of the flexible skin,and the interpolation surface reconstruction algorithm based on curvature information are theoretically analyzed.An experiment system for curvature calibration of flexible skin was built.A flexible skin with two layers of silicone rubber embedding organic silica gel and fiber Bragg grating sensors was fabricated.The wavelength shifts of the fiber grating for different samples under different curvatures were experimentally measured.The relationship between the wavelength shift of the fiber grating and the curvature of the flexible skin is analyzed.The interpolation algorithm is used to reconstruct the deformation surface of the flexible skin.The technical feasibility of real time monitoring of morphing wing flexible skin shape with fiber sensing is verified.The study results show that the fiber grating sensing method can be used for real-time shape perception of flexible skin; the measurable curvature range is not less than 25 m^（-1） and the sensitivity can reach 28.07 pm/m^（-1）.The optical fiber sensing method has a promising application prospect in real-time monitoring of deformed wing shape.