车载虚拟仪表应用VRML设计的研究  

A Method for Applying VRML to Design Vehicle Virtual Instruments

作　　者：贺跃[1] 

机构地区：[1]北京理工大学,北京100081

出　　处：《车辆与动力技术》2005年第1期39-41,共3页Vehicle & Power Technology

摘　　要：传统的虚拟仪表一般采用OPENGL、DIRECT3D等开发, 但C++程序代码长、三维模型规模大, 运行环境大量耗用内存资源, 对虚拟现实系统的硬件要求很高, 难以满足虚拟试验的实时性要求. 而虚拟现实建模语言VRML具有优越的低宽带可行性、文件规模较小, 并以事件驱动的方式实现动态交互, 为构建一个以实时三维交互为主要特征的虚拟场景提供了极大的便利. 采用VRML开发虚拟仪表, 能够大大减轻图形工作站的工作负担,满足虚拟试验的实时性要求. 该文具体分析了VRML的建模体系和事件驱动机制, 以电传动车辆的虚拟试验为应用背景, 对车载虚拟仪表提出了一种适合VRML的设计方法, 该设计方法计算简便、运行可靠, 较好地满足了虚拟试验的要求.The traditional virtual instruments developed by OPENGL and DIRECT3D are difficult to satisfy the real time demand because of long C++ codes,large 3—dimensional model,mass drain of memory sources,and high demand for hardware.Whereas,Virtual Reality Modeling Language(VRML)can supply convenience for building real time and interactive virtual scene because of the feasibility of superior low broad band,small file scale and interaction realized by event driven way.The virtual instruments developed by VRML can greatly reduce the burden of graphic workstation,and satisfy the real time demand for virtual experiments.In this paper,the modeling system and event—driven process of VRML are analyzed in detail.Based on virtual experimentation of electrical drive vehicle,a design of virtual instruments adapting to VRML is presented.Calculation and design are simple,and running is reliable,so it satisfies the demand of virtual experimentation.

关 键 词：VRML 虚拟仪表 实时性 C++程序 事件驱动机制 内存资源 虚拟现实系统 动车 虚拟试验 电传动 

分 类 号：TH432[机械工程—机械制造及自动化] TP391[自动化与计算机技术—计算机应用技术]