一个分布式虚拟现实飞行训练系统的若干关键技术研究

The Key Techniques of a Distributed Virtual Reality Flight Training System

在成功研制的单机虚拟现实飞行训练系统ＶＲＦＴＳ的基础上，提出了一个分布式虚拟现实飞行训练系统（ＤＶＲＦＴＳ）的结构，并对其关键技术：网络通信技术、分布式对象－关系数据库、信息同步技术等进行了比较深入的分析和研究，给出了相应的实现方法和解决策略．

Virtual Reality has been already widely used in various simulating and training systems. This paper concentrate on a distributed virtual reality flight training system. The first key technique we researched is to construct an architecture of the DVRFTS. This architecture includes: high speed network, distributed obiect-relational database. platforms of simulation & graphics. and some input/output devices. The second kev technique is our proposal of a distributed object-relational database which integrates the extented relational databases (NF2) and object-oriented databases techniques. The third key technique is our adaption of UDP of TCP/IP as network protocol. This protocol can obviously reduce the dalay of information transport The fourth key technique is our proposal of a synchronization model ITSPNs (Inhibit Time Stream Petri Nets) which takes into consideration the distributed VR environment.