基于MLS的航空叶片中弧线提取方法

中国机械工程 ›› 2014, Vol. 25 ›› Issue (7): 959-964.

基于MLS的航空叶片中弧线提取方法

张红影1;李启东1;李文龙1;王晓兵2

1.华中科技大学数字制造装备与技术国家重点实验室，武汉，430074
2.湖北三江航天险峰电子信息有限公司，孝感，432000

出版日期:2014-04-10 发布日期:2014-04-11
基金资助:
国家自然科学基金资助项目(51105155，51275192)；国防科工局技术基础研究项目(Z042013T002)

An Effective Extraction Method of Aviation Engine Blade's Mean Camber Line Based on MLS Method

Zhang Hongying1;Li Qidong1;Li Wenlong1;Wang Xiaobing2

1.Huazhong University of Science and Technology,State Key Lab of Digital Manufacturing Equipment and Technology, Wuhan, 430074
2.The Hubei Sanjiang Space Xianfeng Electronic & Information Co.,Ltd,Xiaogan,Hubei,432000

Online:2014-04-10 Published:2014-04-11
Supported by:
National Natural Science Foundation of China（No. 51105155，51275192）

摘要/Abstract

摘要：

航空发动机叶片是高性能航空发动机的核心部件，其几何形状和加工精度对航空发动机的使用性能有很大影响。因其特殊的工作环境和功能要求，一般将其设计加工为变截面、强扭曲、薄壁曲面，其中弧线是表征其几何形状的重要参数之一，如何快速高效地提取叶片截面中弧线参数已成为航空叶片检测中亟待解决的关键问题。为此结合移动最小二乘法(MLS)提取中弧线，该方法首先将叶片二维截面点云进行分段处理，并通过带影响域的移动最小二乘对叶盆、叶背稀疏点进行加密，进而利用等距曲线原理提取航空叶片中弧线参数。同时就中弧线提取算法精度评价和噪声影响进行分析。

关键词: 航空叶片, 中弧线提取, 分段等距曲线, 移动最小二乘

Abstract:

The aviation engine blade is the core component of high performance aero engine, the shape and the machining precision have great impact on its characteristics. Because of its working environment and functional requirements, the geometry shape of the blade was designed to be of variable cross-sections and high twist surfaces. One of the most important parameters to measure the blade geometry was the mean camber line. How to extract the mean camber line of blade accurately and efficiently was one of the problems to be solved urgently. Thus this paper combined MLS method and piecewise isometric curve principle to extract the mean line. This method first divided the engine blade section points into segments, and then the MLS method was applied to make the data of the blade much more intensive. Then, the piecewise isometric curve principal was used to extract the blade mean camber line. Besides, the algorithm accuracy was also evaluated, and the MLS algorithm was worked out when there were noises in the point cloud.

Key words: aviation engine blade, mean camber line extraction, piecewise isometric algorithm, moving least square(MLS)

中图分类号:

TP391.7

张红影, 李启东, 李文龙, 王晓兵. 基于MLS的航空叶片中弧线提取方法[J]. 中国机械工程, 2014, 25(7): 959-964.

Zhang Hongying, Li Qidong, Li Wenlong, Wang Xiaobing. An Effective Extraction Method of Aviation Engine Blade's Mean Camber Line Based on MLS Method[J]. China Mechanical Engineering, 2014, 25(7): 959-964.

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