DIS中的坐标系统及坐标转换

近几年来，国内正在蓬勃开展对DIS的研究，然而对DIS坐标系统及其转换的研究还不多见。DIS采用地心空间直角坐标系（Geocentric)作为世界坐标系，而现有的大多数仿真器都采用拓扑中心坐标系（Topocentric)或大地坐标系（Geodetic)等坐标系作为世界坐标系。文中旨在介绍DIS标准坐标系及其它几种相关坐标系，并在不同坐标系之间建立了坐标转换关系，同时讨论了不同坐标系中姿态的不同表示方法。算法已应用到我们开发研制的网络接口部件NIU中。

Coordinate System and Coordinate Transformation in Distributed Interactive Simulation

In recent year, the research of DIS in our county is actively doing, but papers about DIS coordinate systems are a few. DIS uses the geo- centric coordinate as the world coordinate. However, most of the existing simulator use local topocentric or geodetic coordinates as their world coordinates. This paper introduces the standard of coordinates on DIS and the other relative coordinates, and establishes the coordinate transformation among the different coordinate systems. At the same time, the orientation representations in different coordinate system and the orientation transformation are also discussed. The algorithm have been used in the NIU developed by us.