Study Of The Virtual Reality Simulation Method For Collaborative Vehicle-Infrastructure System

The cooperative vehicle-to-infrastructure system, CVIS for short, is a large scale and real-time distributed system involving multi-disciplines interaction methods, take advantage of massively parallel computing, sensor networks and other advanced technology, realized the road traffic information intelligence sensing and a safe, efficient and environmental protective cooperative transportation system was build. The3D visual simulation method is a technology integrated with computer graphics, human-computer interaction technology, sensor technology, artificial intelligence. People can integrate with the virtual reality through the appropriate device in this technology. The virtual reality shows the simulation results with three-dimension, and feedback the results to the system timely.Vehicle-to-Vehicle and Vehicle-to-Infrastructure is the main study point in this paper. Virtual simulation is applied into the CVIS simulation, to do the technology research on the virtual reality simulation in CVIS.Based on the CVIS simulation, the paper build local transport virtual model, established the virtual simulation model library with the VEGA/Creator of the Multigen Paradigm visual simulation. Then, a multiple levels of details optimization method is introduced to optimize the people and vehicle model, which can improve the efficiency of the render efficiency of virtual simulation. For the complex structure of the original model, it is optimized by the node optimization based on the node function, improved search efficiency of model node. In terms of the vehicle simulation, a Data Glove and VMSENS device is introduced in the system. A interaction platform for driving assist for interaction is designed, enables the operator to be able to assistant the driving operation with the help of virtual device. In optimization of the simulation platform, a dynamic model loading mechanism based on the simulation scene is designed to improve the model-loading efficiency, reduced the memory occupation of the virtual model. The vehicle route is fitted and interpolation by the least square method to smooth transition trajectory simulation. During simulation, a mechanism of dynamic vehicle pose adjustment mechanism is introduced to the system, so that the vehicle can maintain its pose synchronized the real-time simulation system achieved a better visual simulation results. The CVIS virtual simulation platform is established in the last paper proves that the fundamental functionality of the platform could normally perform, verified the systems performance and function with the application of the typical scenes, such as the information interaction among vehicle-to-vehicle and vehicle-to-infrastructure. A large amount of system data is converted to the visual graphical information in the system. The visual simulation method improved the efficiency and interactive property, improved the efficiency of the CVIS development efficiency.