Research And Development Of Vehicle Virtual Driving System Based On Virtual Reality Technology

This paper has a systemic research on the Vehicle Virtual Driving System (VVDS). VVDS is an advanced simulation system, which is based on vehicle motion simulation model built by vehicle dynamics, and integrated with many technologies such as Virtual Reality, 3-Dimention Real-time Rendering and Computer Interface and Multimedia, and so on. In the presence of Vehicle Virtual Driving System, it is effective to study the correlation bettween vehicle, drivers and road (environments); a powerful research tool can be offered to the digital design and performance study of vehicle; a convenient platform can be provided to the traffic simulation and the researchment in psychological and behavioral characteristics of drivers. Also, VVDS is an efficient and energy saving approach for drivers training. So the study of it has a great academic and practical significance, and its productions have a good market.In this paper, combining with the theories of Virtual Reality modeling, object-oriented modeling and mathematical modeling we planed the approaches of constructing kinds of models in VVDS and designed its whole frame and the developing projects of each part. Via the object-oriented analysis of vehicle dynamic system, a dynamic simulation model was constructed in the methods of object-oriented modeling and mathematical modeling based on vehicle kinematics and dynamics theories. A scene management platform of the virtual driving system was built by the DirectX technology and C++. Using modified Euler method, a vehicle motion simulation model was founded combining with vehicle mathematical model and the analysis of its movement. Based on the virtual reality behavior modeling theory, a vehicle real-time operating model was set up, which accords with the driver operation process of real driving and reflects the change of terrain that the vehicle has passed. At last, adopting program software VC++ 6.0 we developed the vehicle virtual driving software and realized virtual driving simulation.The vehicle dynamic model, motion simulation model and real-time operating model which were built in this paper provide a convenient and robust tool for automobile virtual driving simulation and digital experiment. Based on DirectX, the scene management platform offers an efficient and reliable running environment, and makes an immersion environment with virtual vision and sound imitation.