基于逆向工程的航空发动机叶片三维重建模型构建

Construction of 3D reconstruction model of aero engine blade based on reverse engineering

摘要:

为精准控制航空发动机叶片型面数据，设计出更符合实际应用需求的发动机叶片，针对基于逆向工程的航空发动机叶片三维重建模型构建方法展开研究。按照逆向工程原理，采集三维数据样本，并根据误差修正条件，定义发动机叶片三维数据的拓扑关系，从而分析三维数据样点的邻域形式，实现航空发动机叶片三维数据的邻域构建。实施对三维数据的点云拼接处理，遵循三维拟合原则，提取完整的发动机叶片边界，再根据三维重建节点配置需求，确定重建四元数的取值范围，推导具体的重建模型表达式，完成基于逆向工程的航空发动机叶片三维重建模型的构建。实验结果表明，上述模型的应用可以保证建模时标志点、三维重建后标志点间的坐标误差不超过0.5mm，符合精准构建航空发动机叶片的实际应用需求。

Abstract:

In order to accurately control aeroengine blade surface data and design engine blades that are more suitable for practical application needs, the Iterative reconstruction model construction method of aeroengine blades based on Reverse engineering is studied. According to the principle of Reverse engineering, collect 3D data samples, and define the topological relationship of 3D data of engine blades according to the error correction conditions, so as to analyze the neighborhood form of 3D data samples and realize the neighborhood construction of 3D data of aeroengine blades. Implement the point cloud splicing processing of 3D data, follow the 3D fitting principle, extract the complete engine blade boundary, determine the value range of the reconstructed Quaternion according to the Iterative reconstruction node configuration requirements, derive the specific reconstruction model expression, and complete the construction of the Iterative reconstruction model of the aeroengine blade based on Reverse engineering. The experimental results show that the application of the above model can ensure that the coordinate error between the landmarks during modeling and the landmarks after Iterative reconstruction does not exceed 0.5mm, which is in line with the actual application requirements for precise construction of aeroengine blades.