基于OpenFlight的数字地形处理软件包设计及应用

Design and Application of Digital Terrain Processing SDK Based on OpenFlight

数字地形技术的发展为雷达系统仿真领域提供了一个新的发展方向。该文基于OpenFlight格式地形数据库,分析了地形数据库的组成要素、建模方法及数据结构。详细论述了数字地形信息的提取、多叉树的遍历及地形数据坐标转换的实现方法,并针对雷达模拟器设计中对地形数据访问复杂的难题,提出将通用三角面地形数据转化为网格化数据的新思想。运用面向对象设计思想,开发了数字地形处理软件包。详细探讨了软件包在雷达模拟器中的应用,并进行了仿真试验,给出了仿真图例。实践证明数字地形处理软件开发包在雷达模拟器设计中实现了高逼真的雷达仿真图像,为雷达模拟器的设计提供了有效的工具,具有较强的工程实用价值。

The development of the digital terrain provides a new foreground for the radar system simulation. The basic components, modeling method and data structure of OpenFlight terrain database are analyzed. The pickup of digital terrain information, multi - tree traversal and transformation of the coordinate system are discussed in detail. In view of the problem of the terrain data accessing, a new method to transform the current triangular terrain data into the grid data is brought forward. The SDK of digital terrain information processing is developed using the OOD. The application of the SDK in a radar simulator is illustrated. The simulation result is discussed and analyzed. It is shown that high - fidelity simulated radar images can be obtained using the SDK based on the OpenFlight terrain database. This SDK provides an efficient tool for the design of radar simulators and has great application value.