Abstract: During the flight of an aircraft, the wing and fuselage usually produce local and structural small deformation that can not be directly recognized by human eyes, which will damage the flight aerodynamic performance of the aircraft. To solve this problem, in the research, the 3D laser scanning technology which can achieve millimeter reverse modeling is applied to the micro deformation detection of aircraft wing. Through the designed scheme, the technical links of the whole process, such as point cloud acquisition, point cloud registration, filter denoising, packaging modeling and deformation index extraction, are explored, and the feasibility of the whole technical process is verified. At the same time, the accuracy of 3D laser scanning technology applied to wing micro deformation detection is evaluated through comparative analysis experiments. The experimental results show that the comprehensive detection accuracy of this technology can reach 0.12 mm, which can reach the nominal accuracy of the experimental scanning instrument.

Key words: 3D laser scanning, point cloud processing, wing model, deformation detection, reliability analysis