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

Acta Mechanica Sinica 2024年第8期40卷 120-132页

作者： Liqiang Gao Yan Liu Bin Jiang Zhendong Ge Haoyang Li Xiang Guo Tao Suo Qifeng Yu School of Civil Aviation Northwestern Polytechnical UniversityXi’an710072China Shaanxi Key Laboratory of Impact Dynamics and Engineering Application Northwestern Polytechnical UniversityXi’an710072China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen518060China Institute of Intelligent Optical Measurement and Detection Shenzhen UniversityShenzhen518060China

The measurement of wing dynamic deformation in morphing aircraft is crucial for achieving closed-loop control and evaluating structural *** 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 *** 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 *** verify the proposed method,a dynamic deformation measurement experiment is conducted on a variable-sweep wing *** 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 *** maximum sweep variable angle is 36.6°,and the span variation is up to 101.13 *** 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

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