Research On Simulation Technology About Wing-fuselage Posture Alignment Of Aircraft Assembly

Assembly of wing-fuselage is an important part of the aircraft assembly.The traditional method of the assembly is combining fixed tooling positioning with manual joining,but its weaknesses of inefficient,difficult manual joining are unable to adapt to the requirements of modern aircraft assembly.Therefore,it is important to develop a high efficiency and automatic fixture system for Wing-fuselage posture alignment.However,fixture system involves many fields,the process of it is complicated,and it is necessary to make lots of physical prototypes to verify the program.It would bring many problems,such as high cost,low efficiency and so on.At the beginning of the research and development of the fixture system,simulation technology can avoid the above problems effectively,and it plays an important role in the research of the wing-fuselage posture alignment technology.In this paper,take wing-fuselage posture alignment of aircraft as the research object,motion simulation model is designed.Trajectories were planned by using different polynomial equations and optimal adjustment time were solved.Then the rationality about contents were analyzed with the help of simulation technology.Finally,the motion simulation software about wing-fuselage posture alignment of aircraft assembly was developped.This paper mainly studies the following aspects:(1)The simulation models about the three axis positioner,the fuselage and wing of aircraft were constructed,meanwhile different layout modes were discussed,so that model foundation could be used for finite element analysis and software development.(2)The description method of wing-body posture was studied,and the attitude adjusting process was planned;The means of pose constraint for fork ear docking was proposed;The motion situation based on different trajectory polynomials were analyzed,and the optimal adjustment time by means of dichotomy was determined.(3)Counting on simulation technology,the simulation models and layout mode were analyzed,and the rationality of this scheme was verified;The intial and target posture were setted to solve the optimal adjustment time in MATLAB.The rationality of positioner span,polynomial trajectory planning as well as dichotomy to solve the optimal time which were verified by analyzing the motion condition in the Specific examples.(4)The motion simulation software about wing-body posture alignment of aircraft assembly was developed.The different modules accordding to functional requirements are designed;The software framework based on MFC and OpenGL was built.The process and method of 3D visualization were studied,and the software interface with fine interactivity was designed.