A novel videogrammetry-based full-field dynamic deformation monitoring method for variable-sweep wings
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.
Morphing aircraftVariable-sweep wingVideogrammetryLarge dynamic deformationTarget matching and tracking
高利强、刘燕、江斌、葛振东、李昊阳、郭翔、索涛、于起峰
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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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Morphing aircraft Variable-sweep wing Videogrammetry Large dynamic deformation Target matching and tracking
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