基于OGRE的雷达建模及其分析方法设计与实现

发布时间：2018-05-04 13:29

本文选题：OGRE + 雷达　；参考：《中国地质大学（北京）》2014年硕士论文

【摘要】：OGRE(Object-Oriented Graphics Rendering Engine，面向对象图形渲染引擎)是一种应用广泛的三维图形引擎。它实现了基于硬件操作的三维图形图像开发环境，能解决“直接使用API开发三维GIS系统过于复杂”的问题。此外，OGRE还能提供场景交互功能以及逼真的场景渲染技术，并支持Direct3D和OpenGL技术规范，从而大大提高了使用OGRE构建大型三维GIS平台的开发效率。相控阵雷达和机械式雷达已广泛地应用于军事领域，例如地面远程预警、机载和舰载预警、地面和舰艇防空系统、机载和舰载防空系统、靶场测量等。OGRE构建的三维地球中，采用三维渲染技术实现对相控阵雷达和机械式雷达的三维可视化建模，使得雷达形态的显示更直观，雷达特征的表达更立体。然后通过OGRE强大的材质脚本，展现出逼真的效果。本文对雷达的建模方式和相关的分析算法两个关键技术开展相关研究工作。数据是雷达建模、分析的基础。本文中使用的数据主要是DEM数据和低空目标的模型资源（如飞机模型）。从DEM精度、成本、花费时间、应用范围这些方面，，评价了DEM的几个主要的数据来源，确定了通过使用遥感影像获取DEM数据和以八叉树的金字塔模型的方式组织DEM数据。本文设计了机械式雷达和相控阵雷达的建模方式，实现了包络融合、地形遮蔽、波束跟踪、雷达告警四类分析算法。包络融合算法包含了大量的多面体布尔运算，考虑到效率的问题，在此处使用了carve CSG库(一个快速的多面体布尔运算库)；地形遮蔽采用通视分析的算法实现；波束跟踪和雷达告警根据本文雷达的特征，设计了可行的算法，实现了这两个功能。相对于在复杂环境下工作的真实雷达，三维可视化技术模拟的雷达，在雷达的设计和性能测试方面经济性凸显。军事雷达的系统性能试验，如果通过外场试验或实验性的方法来进行，花费巨大，重复利用率小。但是，使用雷达的模拟技术就可以解决这些问题，参数可以灵活的修改，场地可以实时变换，绝大部分试验要求的条件也可以模拟。总之，使用三维可视化技术模拟的雷达也可以精确地评价雷达系统在各种环境的性能。
[Abstract]:OGRE(Object-Oriented Graphics Rendering engine (Object-Oriented Graphics rendering engine) is a widely used 3D graphics engine. It realizes the 3D graphics and image development environment based on hardware operation, and can solve the problem of "using API to develop 3D GIS system is too complicated". In addition, ogre can also provide scene interaction and realistic scene rendering technology, and support Direct3D and OpenGL specifications, which greatly improves the development efficiency of using OGRE to build large 3D GIS platform. Phased array radar and mechanical radar have been widely used in military fields, such as ground long-range warning, airborne and shipborne early warning, ground and naval air defense systems, airborne and shipborne air defense systems, range measurements, etc. The 3D visualization modeling of phased array radar and mechanical radar is realized by using 3D rendering technology, which makes the display of radar morphology more intuitive and the expression of radar features more stereoscopic. Then through the OGRE powerful material script, show the lifelike effect. In this paper, two key technologies of radar modeling and related analysis algorithms are studied. Data is the basis of radar modeling and analysis. The data used in this paper are mainly DEM data and model resources of low altitude targets, such as aircraft model. From the aspects of DEM precision, cost, time and scope of application, this paper evaluates several main data sources of DEM, determines how to obtain DEM data by using remote sensing images and how to organize DEM data by pyramid model of octree. In this paper, the modeling methods of mechanical radar and phased array radar are designed, and four kinds of analysis algorithms such as envelope fusion, terrain masking, beam tracking and radar alarm are realized. The envelope fusion algorithm includes a large number of polyhedron Boolean operations. In view of the efficiency problem, the carve CSG library (a fast polyhedron Boolean algorithm) is used here, and the terrain masking is realized by the general view analysis algorithm. According to the characteristics of the radar, a feasible algorithm is designed and these two functions are realized. Compared with real radar which works in complex environment, 3D visualization technology simulates radar, which is economical in radar design and performance test. The system performance test of military radar, if it is carried out by field test or experimental method, will cost a great deal and reduce the reuse rate. However, these problems can be solved by using radar simulation technology. The parameters can be flexibly modified, the site can be changed in real time, and most of the experimental conditions can be simulated. In a word, the radar simulated by 3D visualization technology can also accurately evaluate the performance of radar system in various environments.
【学位授予单位】：中国地质大学（北京）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P225.1

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