本文選題：OGRE + 雷達　； 參考：《中國地質(zhì)大學（北京）》2014年碩士論文

【摘要】：OGRE(Object-Oriented Graphics Rendering Engine，面向?qū)ο髨D形渲染引擎)是一種應(yīng)用廣泛的三維圖形引擎。它實現(xiàn)了基于硬件操作的三維圖形圖像開發(fā)環(huán)境，能解決“直接使用API開發(fā)三維GIS系統(tǒng)過于復雜”的問題。此外，OGRE還能提供場景交互功能以及逼真的場景渲染技術(shù)，并支持Direct3D和OpenGL技術(shù)規(guī)范，從而大大提高了使用OGRE構(gòu)建大型三維GIS平臺的開發(fā)效率。 相控陣雷達和機械式雷達已廣泛地應(yīng)用于軍事領(lǐng)域，例如地面遠程預(yù)警、機載和艦載預(yù)警、地面和艦艇防空系統(tǒng)、機載和艦載防空系統(tǒng)、靶場測量等。OGRE構(gòu)建的三維地球中，采用三維渲染技術(shù)實現(xiàn)對相控陣雷達和機械式雷達的三維可視化建模，使得雷達形態(tài)的顯示更直觀，雷達特征的表達更立體。然后通過OGRE強大的材質(zhì)腳本，展現(xiàn)出逼真的效果。 本文對雷達的建模方式和相關(guān)的分析算法兩個關(guān)鍵技術(shù)開展相關(guān)研究工作。 數(shù)據(jù)是雷達建模、分析的基礎(chǔ)。本文中使用的數(shù)據(jù)主要是DEM數(shù)據(jù)和低空目標的模型資源（如飛機模型）。從DEM精度、成本、花費時間、應(yīng)用范圍這些方面，，評價了DEM的幾個主要的數(shù)據(jù)來源，確定了通過使用遙感影像獲取DEM數(shù)據(jù)和以八叉樹的金字塔模型的方式組織DEM數(shù)據(jù)。 本文設(shè)計了機械式雷達和相控陣雷達的建模方式，實現(xiàn)了包絡(luò)融合、地形遮蔽、波束跟蹤、雷達告警四類分析算法。包絡(luò)融合算法包含了大量的多面體布爾運算，考慮到效率的問題，在此處使用了carve CSG庫(一個快速的多面體布爾運算庫)；地形遮蔽采用通視分析的算法實現(xiàn)；波束跟蹤和雷達告警根據(jù)本文雷達的特征，設(shè)計了可行的算法，實現(xiàn)了這兩個功能。相對于在復雜環(huán)境下工作的真實雷達，三維可視化技術(shù)模擬的雷達，在雷達的設(shè)計和性能測試方面經(jīng)濟性凸顯。軍事雷達的系統(tǒng)性能試驗，如果通過外場試驗或?qū)嶒炐缘姆椒▉磉M行，花費巨大，重復利用率小。但是，使用雷達的模擬技術(shù)就可以解決這些問題，參數(shù)可以靈活的修改，場地可以實時變換，絕大部分試驗要求的條件也可以模擬�？傊褂萌S可視化技術(shù)模擬的雷達也可以精確地評價雷達系統(tǒng)在各種環(huán)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.
【學位授予單位】：中國地質(zhì)大學（北京）
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：P225.1

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