基于摄像测量的变后掠翼全场动态变形监测新方法

A novel videogrammetry-based full-field dynamic deformation monitoring method for variable-sweep wings

高利强 ¹刘燕 ²江斌 ³葛振东 ³李昊阳 ³郭翔 ³索涛 ³于起峰⁴

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作者信息

1. School of Civil Aviation,Northwestern Polytechnical University,Xi'an 710072,China;Shaanxi Key Laboratory of Impact Dynamics and Engineering Application,Northwestern Polytechnical University,Xi'an 710072,China
2. College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;Institute of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518060,China
3. Shaanxi Key Laboratory of Impact Dynamics and Engineering Application,Northwestern Polytechnical University,Xi'an 710072,China
4. School of Civil Aviation,Northwestern Polytechnical University,Xi'an 710072,China;Shaanxi Key Laboratory of Impact Dynamics and Engineering Application,Northwestern Polytechnical University,Xi'an 710072,China;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;Institute of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518060,China
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摘要

变体飞行器机翼动态变形监测是实现闭环控制和评估结构安全性的关键.针对具有主动大变形能力的变后掠机翼,本文提出了一种机翼全场三维动态变形摄像测量方法.首先为匹配立体图像对应的同名特征点,提出了一种基于极线约束结合拓扑约束的立体匹配方法;其次提出了一种基于仿射变换与邻近点匹配相结合的方法实现了大变形时序图像中特征点的快速自动跟踪;最后建立动态变形参数分析计算模型获得了位移、后掠变角和展长变化量.通过开展变后掠翼模型动态变形测量实验验证了所提方法的有效性.结果表明,所提方法的实际精度约为测量区域的0.02％(例如,1.6 m尺度下为0.32 mm).在一个变体历程中,机翼后掠变角、展长变化量和位移均先增后减,后掠变角最大为36.6°,展长变化量达到101.13 mm,有效重建了机翼不同变体时的整体构型.

Abstract

The measurement of wing dynamic deformation in morphing aircraft is crucial for achieving closed-loop control and eval-uating structural safety.For variable-sweep wings with active large deformation,this paper proposes a novel videogrammetric method for full-field dynamic deformation measurement.A stereo matching method based on epipolar geometry constraint and topological constraint is presented to find the corresponding targets between stereo images.In addition,a new method based on affine transformation combined with adjacent closest point matching is developed,aiming to achieve fast and automatic tracking of targets in time-series images with large deformation.A calculation model for dynamic deformation parameters is established to obtain the displacement,sweep variable angle,and span variation.To verify the proposed method,a dynamic deformation measurement experiment is conducted on a variable-sweep wing model.The results indicate that the actual accuracy of the proposed method is approximately 0.02％of the measured area(e.g.,0.32 mm in a 1.6 m scale).During one morphing course,the sweep variable angle,the span variation and the displacement increase gradually,and then decrease.The maximum sweep variable angle is 36.6°,and the span variation is up to 101.13 mm.The overall configuration of the wing surface is effectively reconstructed under different morphing states.

关键词

Morphing aircraft/Variable-sweep wing/Videogrammetry/Large dynamic deformation/Target matching and tracking

Key words

Morphing aircraft/Variable-sweep wing/Videogrammetry/Large dynamic deformation/Target matching and tracking

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基金项目

National Natural Science Foundation of China(12202282)

出版年

2024

力学学报(英文版)

CSTPCD

影响因子：0.363

ISSN：0567-7718

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