Research On Modeling And3D Scene Simulation Of Some Aircraft

3D scene simulation technology of aircraft is a kind of integrated high and newtechnology which is relied on virtual reality technology. It can offer an intuitive and efficientvirtual reality simulation platform to vehicle research and development, manufacturing,performance test, aircraft piloting and flight simulation training. In this paper, aircraftmodeling and its three-dimension visual simulation technology are seen as the research object,and the relevant technologies are studied such as mechanical modeling of aircraft,three-dimension terrain frame construction algorithm,3D model database creation, visualscene drive configuration. The system here is organized by the form of group, they are aircraftmathematics model calculating module,3D model database module, visual scene driveconfiguration module. The main research contents are as follows:Firstly, the F-16fighter mechanics model is researched in this paper.And three numericalcalculating methods for nonlinear differential equations are compared. Finally, theFourth-Order Runge-Kutta method is used to calculate the aircraft mechanics model which isvalidated by simulation experiments.Secondly, three typical Delaunay triangular mesh generation algorithms are compared inwhich the key steps of point insertion algorithm are studied and the target point positioningalgorithm is improved, and establish a fast positioning method moved the center of gravityalong the search direction. When some special cases appear, such as the line from target pointto current center of gravity passes through a vertex of a triangle or coincides with a triangleedge, the next search triangle can be got by topological relation between triangles. Then thecenter of gravity of this triangle instead of last center of gravity will be connected with thetarget point to form new search direction. Keeping on search and the problem of cut-off pointcan be solved. Simulation results show that the construction efficiency and the robustness ofthe triangle network have been improved.Thirdly, the3D modeling theory and technology are applied to build the aircraft model,the airport runway model and the large terrain scene model. The3D model is optimized byadvanced modeling techniques, and3D model database which balances the real-timeperformance with verisimilitude can be generated.Fourthly, initial configuration, adding collision detection, setting up observation points, building a simulation environment of the three-dimension visual scene are operated by theLynx Prime graphic user interface editor. Then the realistic three-dimension visual scene isobtained.Finally, analyze visual main program generated by Vega Prime. Modules will beintegrated through the software VS2003.Net, generating the basic aircraft three-dimensionvisual simulation system based on the MFC framework.