基于虚拟现实技术的虚拟维修系统，改变了传统维修中单一的现场作业方式。
Virtual maintenance system, based on virtual reality technology, changes the job mode of conventional maintenance.
沉浸式虚拟维修系统的关键技术包括模型建立、碰撞检测、虚拟人控制、程序控制实现和视景驱动控制。
The key technology of immersion virtual maintenance and training system includes model establishment, collision detection, virtual human control, program control realization, and view drive control.
针对传统场景图结构在开发虚拟维修训练系统时的局限性，提出了一种新的场景图数据结构。
To remove the limitations of traditional scene graph structure in development of virtual maintenance training system(VMTS), a new scene graph structure is presented.
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