基于局部轮廓特征的航空叶片综合误差评定方法
2019-04-23
作者：刘泽涛，吕彦明，王帆
单位：江苏省食品先进制造装备技术重点实验室
摘要：针对航空叶片综合误差评定方法效率不高和建模过程数据量大等问题，提出一种基于局部轮廓特征的评定方法。考虑到叶型轮廓的曲线形状因素，在多边形逼近方法的基础上做出改进，利用极值的局部性分析曲线曲率，以此分割曲线并提取轮廓特征点；采用最近点配准算法使被测轮廓与理论轮廓达到精确配准，建立误差评定模型，从而实现对航空叶片综合误差的评定；使用测量数据对评定方法进行试验验证，试验结果与三坐标测量机的评价结果一致，表明该方法有效可行。
关键词：轮廓特征；航空叶片；综合误差评定
中图分类号：TG806；TH161文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.04.029
Aeronautical Blade Comprehensive Error Evaluation Method
Based on Partial Contour Feature
Liu Zetao，Lv Yanming，Wang Fan
Abstract:In order to solve the problems of low efficiency in aeronautical blade comprehensive error evaluation and large amount of data in the modeling process，an evaluation method based on partial contour features is proposed.Considering the curve shape factor of the blade profile，the improvement is made on the basis of the polygon approximation method by using the locality of the extremum to analyze the curvature of the curve and in this way to splite the curve and extract the contour feature points.By using the nearest point registration algorithm to achieve accurate registration of the measured contour and the theoretical contour，an error assessment model is established to assessment of the integrated error of the aviation blade.The measurement method is used to verify the evaluation method，and the experimental results are consistent with the evaluation results of the CMM，which indicates that the data is feasible and effective.
Keywords:contour feature；aeronautical blade；comprehensive error evaluation