The Design And Implement Of Crawler-type Automobile Virtual Driving Training System

Crawler-type automobiles are widely adopted in the field of engineering due tosuch strengths as wide range of road condition, high propulsive efficiency, small unitpressure of ground and strong ability to get through. However, a large amount ofmanpower, material and financial resources are required because of relatively high levelof mechanization and automation, complicated operating manipulation and extremelyhigh requirements toward drivers’ operating abilities. Therefore, crawler-typeautomobile virtual driving training system, which integrates such advanced technologiesas virtual reality, motional and visual simulation, have gradually become the key ofstudies in crawler-type automobile driving training system field due to its capabilities toeffectively make up the shortcomings of practical training being restricted by time,place and environment, together with its strengths as safe, economic, environmentallyfriendly and highly efficient.This thesis conducts studies on such key technologies as visual simulation andmotional modeling according to features of crawler-type automobile driving training,upon which, designs and implements crawler-type automobile virtual driving trainingsystem, so as to improve effect of driving training, reinforce instantaneity, interactivityand immersion of system.Achievements made through this thesis include these aspects as follows:Firstly, this thesis puts forward integral system design proposals according tofunctional requirements of driving training, conducts studies on relevant modeling andscene rendering technologies, together with image display alternating process, thusproviding technical support for designing and implementing systemic function. At thesame time, it establishes models of dynamics mathematics and real-time operationthrough analysis of load carrying condition of crawler-type automobiles under differentoperating conditions, which lays theoretical and programming foundation on realization of motional simulation.Secondly, this thesis adopts quadtree LOD algorithm to dynamically structurethree-dimensional terrain scene and skydome, which integrates with texture mappingtechnology to structure skydome, designs multi-viewport display changing-over andmethods of testing collision to optimize scenes and improve rendering speed, with anaim to solve formerly single graphical interface of visual simulation system, togetherwith poor interactivity and immersion.Finally, this thesis adopts3DSMAX as a geometric modeling tool, Visual C++6.0programming language, which integrates OpenGL graphical interfacing tool to designand implement virtual driving training system which possesses training evaluation,meter display, special visual and sound efficiency. According to verification, thissystem achieves specific crawler-type automobile driving training with smooth visualframes and strong sense of reality, thus effectively improving instantaneity, interactivityand immersion of system.