|
|
|
| Optimized scanning path of wing panel based on genetic algorithm |
| AI Xiao-xiang1, YU Ci-jun1, FANG Qiang1, CHEN Lei2, FANG Wei2, SHEN Li-heng2 |
| 1.Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; 2. China COMAC Shanghai Aircraft Manufacturing Company Limited, Shanghai 200436, China |
|
|
|
Abstract Scanning path for wing skin was planned automatically in advance in order to complete the scanning of wing skin quickly in the process of wing panel digital assembly. Wing skin was represented by a series of sampled points. These sampled points were divided into groups automatically based on least square method after explaining the theory of laser scanner and analyzing the scanning constraints such as scanning angle, depth and width. The scanning process was divided into two actions of alternating motion combination for scanning measurement and attitude adjustment. The objective function about how to make the scanning process as short as possible was created. Genetic algorithm was used to solve the problem so that the scanning path could be optimized in three dimensions. The new method was compared with the traditional methods such as trapezoidal scanning and line scanning method. Results show that the general scanning path of this method is shorter and use fewer attitudes.The average scanning efficiency was increased by 14.4%. The scanning simulation of robot with a scanner along the optimized path was completed, meeting all constraints requirements using DELMIA software platform, and the time of simulation was the same to the calculated value．
|
|
Published: 28 August 2015
|
|
|
基于遗传算法的机翼壁板扫描路径优化
针对飞机机翼壁板数字化装配过程中蒙皮外形快速扫描的需求,对蒙皮的扫描路径进行自动规划.介绍激光扫描仪扫描测量的原理及方法,并分析扫描仪扫描样点时的倾角、距离及扫描宽度等约束条件.以大尺寸件机翼蒙皮为研究对象,对其进行数字化离散操作,得到一系列样点.使用最小二乘法对上述样点进行自动分组.在此基础上把扫描过程分为扫描测量和姿态调整2种动作交替运动的组合,构建以扫描过程总时间为最小的优化目标函数.利用遗传算法求解目标函数,从而优化三维空间的扫描路径,并将此路径与常见的梯形扫描和直线扫描路径进行比较,扫描总路径短且所用总姿态数少,平均扫描效率提高14.4%.最后,采用DELMIA软件平台进行扫描过程仿真,利用搭载扫描仪的机器人沿优化路径进行扫描.结果显示：本研究可满足扫描约束要求,且扫描仿真时间与计算时间一致.
|
|
| ［1］ 马素文. 三维激光扫描在测量中的应用现状［J］. 山西建筑,2011, 37(9): 207-208．
MA Su-wen. Application status of 3D laser scanner in the measurement ［J］. Shanxi Architecture, 2011, 37(9): 207-208．
［2］ LEE K H, PARK H. Automated inspection planning of free-form shape parts by laser scanning ［J］. Robotics and Computer Integrated Manufacturing. 2000, 16(4) : 201-210．
［3］ ZHAO H B, KRUTH J, VEN GESTEL N, et al. Automated dimensional inspection planning using the combination of laser scanner and tactile probe［J］. Measurement. 2012, 45(5): 1057-1066．
［4］ 李剑. 基于激光测量的自由曲面数字制造基础技术研究［D］. 杭州: 浙江大学, 2001: 1593．
LI Jian. Fundamental research of digital manufacturing of freeform surface based on laser measurement ［D］. Hangzhou: Zhejiang University, 2001: 1593．
［5］ 李雄兵, 杨岳, 胡宏伟,等. 面向超声检测的曲面自动测量［J］, 中南大学学报, 2010, 41(1): 194-199．
LI Xiong-bing, YANG Yue, HU Hong-wei， et al. Complex surface automatic measurement for ultrasonic inspection ［J］. Journal of Central South University， 2010, 41(1): 194-199.
［6］ 海克斯康测量技术（青岛）有限公司. 实用坐标测量技术［M］. 北京: 化学工业出版社,2007: 99-106．
［7］ HAGENIERS O L. Recent advances in laser triangulation-based measurement of airfoil surfaces ［C］∥ Industrial Optical Sensors for Metrology and Inspection. Canada: ［s. n.］, 1995: 222.
［8］ 宋开臣. 三坐标测量机激光扫描测量系统的研究［D］. 天津: 天津大学, 1997: 32-34．
SONG Kai-chen. Research of CMM and system of laser measurement ［D］. Tianjing: Tianjing University. 1997: 32-34．
［9］ 程志刚, 王巧生. 模具高速加工中的走刀路径策略［J］.模具制造技术, 2006, 8(2): 61-63．
CHENG Zhi-gang, WANG Qiao-sheng. Cutting route strategy in mold high-speed milling ［J］. Mold Manufacturing Technology, 2006, 8(2): 61-63．
［10］ 吴光琳, 李从心, 阮雪榆. 型腔加工中的行切方向的优化方法［J］. 模具技术, 1999, (2): 17．
WU Guang-lin, LI Cong-xin, RUAN Xue-yu. Optimization of the direction of direction-parallel cutting in pocket machining ［J］. Die and Mould Technology, 1999, (2) : 17．
［11］ 丛明煜, 王丽萍. 智能化遗传算法［J］. 高技术通讯, 2003, 13(4): 43-48．
CONG Ming-yu, WANG Li-ping. Intelligent genetic algorithm ［J］. High Technology Letters, 2003, 13(4): 43-48．
［12］ 吴沧浦. 最优控制的理论与方法［M］. 北京：国防工业出版社,2000: 108226．
［13］ 雷英杰, 张善文, 李续武,等. MATLAB遗传算法工具箱及应用［M］. 西安：西安电子科技大学出版社. 2005: 34-43. |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
