Algorithm for constructing the line-shape feature point clouds of aero-engine ruled blades

By means of the surfaces' geometry features, an algorithm for constructing the line-shape feature point cloud was proposed for reverse design of ruled blade surface requiring high accuracy and complex shape in aviation field. On the basis of the quick recognition for boundary of blades' scattered point clouds, the ruled generatrix vector was extracted with the aid of reverse projection method. The annealing algorithm was applied to match boundary point clouds non-rigidly by means of solving multi-objective optimization problem of boundary point clouds. The equal diversion points were constructed to get inerratic-orderly line-shape feature point clouds which were beneficial to generate high quality blade surfaces quickly. The proposed algorithm has great effect in dealing with point clouds of ruled blades and has a certain theoretical significance and application value on surface reconstruction of point cloud of ruled blades surface. The feasibility of proposed algorithm is verified by experiments.