Method for controlling gap distribution of wing-fuselage joining based on measured data

A method for controlling a gap distribution of a wing-fuselage joining based on measured data, comprising:

• S1) respectively collecting original point cloud data of a wing and original point cloud data of a central wing box of an aircraft;
• S2) preprocessing the original point cloud data of the wing and the original point cloud data of the central wing box;
• performing operations of denoising, filtering and sparsification;
• and removing point cloud data that does not belong to joining surface between the wing and the central wing box;
• S3) respectively registering the preprocessed point cloud data of the wing and the preprocessed point cloud data of the center wing box with corresponding theoretical models;
• S4) according to a simulated joining situation of an entity model of the wing and a simulated joining situation of an entity model of the central wing box;
• selecting key features during joining on the two theoretical models;
• mapping the key features to the registered point cloud data;
• and extracting corresponding point cloud features, wherein the key features comprise positioning points and feature points of the joining surface;
• S5) joining the point cloud data of the wing and the point cloud data of the central wing box based on the positioning points;
• and
• S6) dividing the joining surface into a plurality of areas;
• calculating a gap of the feature points in each of the plurality of areas after joining;
• adjusting a weight of each of the plurality of areas according to gap tolerance to control the gap distribution;
• wherein the weight of each of the plurality of areas is inversely proportional to the gap tolerance thereof.