飞机蒙皮凹坑修复的模型重构方法研究  

Research on Model Reconstruction of Aircraft Skin Pit Repair

作　　者：王学慧 杨志红 史聪聪 彭微 王涛[1] WANG Xuehui;YANG Zhihong;SHI Congcong;PENG Wei;WANG Tao(Department of Mechanical Electronic Engineering, Civil Aviation University of China, Tianjin 300300, China)

机构地区：[1]中国民航大学机械电子工程系,天津300300

出　　处：《机械工程师》2018年第3期120-122,共3页Mechanical Engineer

基　　金：数字制造装备与技术国家重点实验室开放课题资助项目(DMETKF2017018);大学生创新创业训练计划(201610059088)

摘　　要：飞机在飞行过程中遭遇冰雹等恶劣性天气会出现凹坑,超过安全指标的凹坑会对飞机气动外形造成影响,次级弯曲应力增加,疲劳强度降低,威胁飞行安全。针对目前人工测量耗费大量人力、物力且缺乏准确性的现状,提出一种凹坑自动检测与标记技术,具有重要的实际意义。首先,对扫描获得的受损机翼点云进行精简去噪;其次,计算主曲率,设置阈值筛选出凹坑几何特征点,导入到MATLAB重构凹坑模型;最后,利用最小立方体模型计算凹坑的深度、直径等几何参数,与维修标准对比,定位需维修的凹坑。Pits occurs in bad weather such as hail encountered during the flight.Pits that exceed safety specifications can have an effect on the aerodynamic profile of the aircraft,increase the secondary bending stress and reduce the fatigue strength,threaten flight safety.In view of the current man-made measurement of a large amount of manpower,material resources and lack of accuracy of the status quo,a pit automatic detection and marking technology,has important practical significance.Firstly,the impacted wing cloud obtained by the scanning is streamlined and denoised.Secondly,the main curvature is calculated,the thresholds are selected to filter out the geometric feature points of the pits,and the data are imported into MATLAB to reconstruct the pit model.Finally,the minimum cube model is used to calculate the concave pit depth,diameter and other geometric parameters.Compared with the maintenance standards,the pits need to repair the pit are located.

关 键 词：飞机机翼 凹坑 修复 主曲率 最小立方体模型 

分 类 号：V267.47[航空宇航科学与技术—航空宇航制造工程]