基于VR的航空发动机虚拟教学实验系统设计

Virtual Teaching Experiment System of Aero-engine Based on VR

通过航空发动机虚拟教学实验系统的建设,将VR(VirtualReality)技术中的三维立体仿真建模、三维场景管理、基于数据手套与碰撞检测的人机交互式虚拟装配、基于立体眼睛与头盔的立体显示等技术进行了一次综合的实验探索,是将VR综合技术与实验课堂教学相结合的一个尝试。重点论述了系统开发中模型建造的几何建模和实例化、视点控制、虚拟手建模及数据手套交互、立体显示技术等。该系统通过对某航空发动机提供虚拟装配及拆卸、模化教学实验、模型流场的动态显示及发动机试车等实验系统,将学生的视、听积极性充分调动起来,使学生可获得身临其境的感受和体会。

A synthetically exploration of techniques in VR was processed via the construction of the virtual teaching experiment system of aero-engine based on VR, which is an attempt of integrating the VR synthesis technique and experiment teaching together. The techniques are 3D stereo simulation and modeling technique, 3D scene administer technique, Human-Computer virtual assemble technique based on data glove and hit testing, stereo display technique based on stereo eyes and headpiece. The geometry modeling and instantiation technique, view control technique, virtual hand modeling and data glove alternation technique, and stereo display technique were discussed chiefly. This system mobilizes students’ enthusiasm of seeing and hearing adequately by different experiment systems, such as virtual assembly and disassembly, model teaching experiment,dynamic display of flow field, and test-drive of engine, etc, which make the students to get a taste and experience of being personally on the scene.