Study Of Missile Flight Virtual Reality System

With the development of computer simulation technology, simulation technology has been more and more widely applied to the weapon system design such as missile system. But the missile system simulation will generate a great number of data as simulation result, engineer should take much time to analyze the data, and the analysis is boring. According to simulation purpose, build up the 3D model of simulation objects, and take advantage of computer graphics technology, scene simulation can create a vivid virtual scene, objectively express the simulation process in image style. Scene simulation provides flight simulation an efficient analysis means.Considering the current domestic urgent requirement on visual system in flight simulation, use advanced technology of development of visual system, a flight scene simulation system on a certain type missile is developed. The following aspects are mainly studied in this paper.Firstly, the process of 3D terrain modeling technology which was used in the virtual reality simulation system was studied, including the collection of the data source of terrains, making digital elevation model data, simplify DEM data according to LOD principle, generate different level of detail 3D terrain .Then modeling the surface of digital elevation model data using the Creator tool .At the same time, mapping the texture for the surface .At last, a 3D terrain was obtained.Secondly, the paper studied the 3D modeling technology and 3D modeling tool Creator, moreover the 3D models which needed by the simulation system were created by Creator tool, including missile, radar, houses and so on. In order to increase third dimension, principle and implement of the particle system was discussed, it was used to implement the special effects.At last, the paper studied the virtual reality technology and virtual reality simulation software Vega, including its constitutes, running mechanism and programming interface .Then the paper introduced the design and implement of the virtual reality simulation system .including setting up 3D scene, initializing the data of ballistic trajectory, controlling the time of the fly, controlling the point of view, generation of the virtual ocean environment, simulation of cloud.