A multi-constraints based pose coordination model for large volume components assembly  

作　　者：Dian WU Fuzhou DU 

机构地区：[1]School of Mechanical Engineering and Automation,Beihang University,Beijing 100083,China

出　　处：《Chinese Journal of Aeronautics》2020年第4期1329-1337,共9页中国航空学报（英文版）

基　　金：supported by the Special Research on Civil Aircraft of China(No.MJZ-2017-J-96);the Equipment Pre-research Project of China(No.41423010401)。

摘　　要：In the assembly process of large volume product,engineering constraints limit the relative pose of components and serve as a standard for judging assembly quality.However,in the traditional process of target pose estimation,a general method is needed for establishing the correlation between engineering constraints and product pose,and it is difficult to evaluate pose by constraints comprehensively.Therefore,the process of target pose estimation and evaluation is separated.In this paper,a pose coordination model based on multi-constraints is proposed,which includes pre-processing,pose estimation,pose adjustment and evaluation.Firstly,engineering constraints are decoupled into 4 types of Minimum Geometrical Reference Constraints(MGRC),and the inequalities for solving target pose are formulated.Then the Constraint Coordination Index(CCI)is defined as the optimization objective to solve the target pose.Finally,with CCI as the numerical index,the target pose is evaluated to illustrate the quality of assembly.Taking the simulation experiment of wing-fuselage jointing as an example,the external and internal parameters of model are analyzed,and the pose estimation based on multi-constraints reduces the CCI by 12%,compared with the point-set-registration method.

关 键 词：Large volume components Measurement assisted assembly MULTI-CONSTRAINTS Pose estimation Pose evaluation 

分 类 号：V262.4[航空宇航科学与技术—航空宇航制造工程]