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针对航空领域形状复杂、高精度的直纹叶片曲面的逆向设计问题,借助该类叶片曲面的几何特征,提出一种线形特征点云的构造算法.在对叶片散乱点云边界进行快速识别的基础上,采用反投影法提取直纹母线矢量,利用退火算法求解边界数据点配准的多目标优化问题,以实现边界点云数据的非刚性配准.根据配准结果构造等分点,进而得到规则有序的线形特征点云,达到快速生成高质量叶片曲面的目的.本算法在处理直纹叶片点云数据方面具有较好的效果.对直纹叶片的曲面重建具有一定的理论意义和应用价值,通过实验验证了该算法的可行性.
Aiming at the reverse design problem of complicated and high-precision ruled blade surface in aeronautical field, this paper proposes a method to construct a line feature point cloud based on the geometric characteristics of the blade surface.Furthermore, , The back-projection method is used to extract the straight-line bus vector, and the annealing algorithm is used to solve the multi-objective optimization problem of border data point registration in order to realize the non-rigid registration of boundary point cloud data.According to the registration results, Orderly and orderly linear feature point cloud, so as to achieve the purpose of quickly generating high-quality blade surface.This algorithm has a good effect in dealing with point cloud data of ruled blade.It has certain theoretical significance and application to the surface reconstruction of ruled blade The experimental results verify the feasibility of this algorithm.