Research And Implement Of 3D Modeling Technology In Scene Simulation System Of Subway Trains Operation

Scene simulation of rail transportation is an important tool, which is used in traffic characteristic study, driving training and exposition to users. In recent years, studying and developing the system of scene simulation becomes a more and more important direction in the world, because it has many remarkable characteristics such as high security, good recurrence and strong exploration.The development of virtual reality and computer simulation technology offers a technological guarantee for researching and developing the scene simulation system of subway ATC. As for researching and developing the scene simulation system of subway ATC, which must offer the virtual driving environment for subway driver, and virtual running environment for subway vehicles, and then make the users have a feeling of immersion. So the visual modeling is most important for researching of scene simulation. This paper is supported by the science and technology program of Beijing---studying and developing the system of communication based train control, Beijing loop metro line is the research object of this system, according it to develop a desktop scene simulation system, realized the real-time scene simulation of ATC successfully. The paper carried out study at aspect of the complicated modeling, the visual scene designing, the real-time optimizing and the system establishing to realize some important conceptions and methods of scene modeling.On the basis of theory study of scene simulation modeling, combine with the characteristic of vehicle running environment this paper choose the outstanding 3D modeling MultiGen Creator to creator the vehicle running environment of three dimensions. The paper puts up the methods of modeling, especially the technology of visual modeling, and researched the key modeling technology, and then the paper proposed the technology and methods of real-time optimizing the scene modeling based on MultiGen Creator from the aspect of structure optimizing and modeling optimizing. Then solved the contradiction between real-time and reality, and approaches for real-time improvement effectively. At last, the system is realized, which can display scene, walkthrough, drive the motion model, manlike and natural phenomena simulation, and so on. Otherwise, the paper designed the communication between the subsystems to make it meet requirement.