Research On Scene Simulation Of Movement On The Sea For Air Cushion Vehicle

The research of scene simulation is the main constituent of the research of advanced simulation and virtual reality technology.According to the simulation goal, scene simulation uses technology of computer graphics to structure 3D models of the simulated objects or reproduce the real environment to achieve the lifelike visual effect.According to the demand of the comprehensive driving simulation test and control, the paper establishes a corresponding 3D visual environment simulation system. The scene simulation displays the offshore movement process of the Air Cushion Vehicle(ACV) in different conditions directly, thus brings lab assistants convenience to the on-line analysis the simulation processes and results.Corresponding to the scene simulation system, the model database including ACV, trees, buildings etc has been set up using the software Multigen Creator, and the paper describes in detail the obtain and transform of the DED data and the produce of the terrain.In the course of scene simulation, Vega is utilized to develop the project, and the building of 3D scene is done in SGI graphics station. The 3D scene includes the simulation of ocean surface, simulation of stern wake, rain and snow, simulation of cloud and fog etc. GUI has been developed to control the movement of the vehicle in various environments and from different points of view.Based on the Vega modules' extensibility, it makes a preliminary discussion about extending Vega with the self-defining wave module, mainly including extending LynX interface and creating user-defined wave class, to lay the foundation for drawing the wave through the real-time data.By setting up the network communication, the PC port is connected with the SGI port and the motion simulation has been carried out.The system simulation shows that the scene simulation built in this paper satisfies the real-time requirement of the system. It has brought convenience for the control debug and achieved the interaction between the user and the visual scene.