飞行器框架模型结构振动形态感知与重构方法

Method Verification of Vibration Shape Perception and Reconstruction for Aircraft Frame Model Structure

基于光纤布拉格光栅(fiber Bragg grating,简称FBG)曲率检测技术探索智能结构振动状态主动监测,面向飞行器框架模型实现结构振动形态实时感知与三维重构的方法验证。阐述实验系统组成架构与FBG曲率检测单元阵列设计思想,以及实验框架模型结构振动形态三维重构方法的过程。在此基础上叙述FBG曲率检测单元阵列封装、结构形态重构算法的基本原理、实验环境与平台构建方案以及系统软件组成与开发技术。通过将模块化FBG检测单元阵列嵌入至实验模型结构中,结合结构变化形态感知与重构方法分析,进行了模型结构形态实时感知与三维重构方法的实验验证。实验结果表明了所研究的技术方法与实验验证系统的有效性,该方法为高性能飞行器关键结构振动形态的主动监测提供了探索思路。

With the fiber bragg grating(FBG)based curvature detection technology,a new means of active vibration shape monitoring for intelligent structure is investigated.The method verification of vibration shape perception and reconstruction for experimental aircraft framework model is also presented.Ideas behind the design of construction composition of experiment system are introduced,along with the method and process of the three-dimension vibration shape reconstruction of experiment frame model.After that,the design,fabrication and encapsulation of the FBG curvature detection unit,principle of structure shape reconstruction algorithm,construction of the experimental environment platform,and the component and development technology of the software system are described.Using the FBG modular detection units embedded in the experimental frame model,combining the analysis of the structure vibration shape perception and reconstruction method,a detailed experimental verification study is conducted.The results of this experimental study demonstrate the feasibility and effectiveness of the proposed technical method and experimental verification system.Moreover,the corresponding technology and method can provide an effective exploration train of thought for the active monitoring of key structure of high performance aircraft.