【作者】 陈伟；

【导师】 黄曦；

【作者基本信息】 西安电子科技大学 ， 光学工程， 2017， 硕士

【摘要】 红外视景图像是半实物成像制导仿真系统中红外导引头接收到的辐射源,红外视景图像中飞机目标的真实感决定了红外导引头对空中目标的识别、检测和跟踪的准确率。随着军事上对红外制导仿真精度需求的不断提高,如何生成高真实感的红外视景图像,是目前半实物仿真系统中的重点研究内容。基于DMD(Digital Micromirror Device,数字微镜器件)的红外目标模拟器因为相对于传统模拟器具有高帧频、高分辨率等特点,已经成为近几年的研究重点。本文以提高空中目标半实物仿真的真实感为目标,主要研究了飞机目标红外图像的生成方法和红外目标模拟器的非均匀性校正。具体工作内容如下:首先,本文对半实物仿真系统框架进行了分析,阐述了红外目标模拟器的非均匀性对视景图像真实感的影响。然后,研究了飞机和尾焰的红外辐射特性,通过OGRE(Object-oriented Graphics Rendering Engine,面向对象图形渲染引擎)的实时渲染,生成了飞机目标红外图像。最后,对DMD红外目标模拟器的非均匀性进行了研究,对多点定标的非均匀性校正算法进行改进,实现了非均匀性校正的实时化。并对校正结果进行了分析。本文通过对飞机目标红外图像的生成以及DMD模拟器的非均匀性校正,得到了高真实感的飞机目标红外视景图像,为半实物仿真中的导引头提供了高精度辐射源,同时对空中红外目标识别、追踪也有一定的参考价值。更多还原

【Abstract】 The infrared visual image is the radiation source received by the infrared seeker in the semi-physical imaging guidance simulation system.The realism of the aircraft target in the infrared visual image determines the infrared seeker’s accuracy of the target’s identification,detection and tracking.With the military’s increasing requirements on the infrared guidance simulation accuracy,how to generate high realistic infrared image of the air target is an important content of semi-physical simulation system.Compared with traditional simulator,the infrared target simulator based on DMD has become the focus of research in recent years because of its high frame rate and high resolution.This paper aims at improving the realism of semi-physical simulation and mainly studies on the method for generating infrared target image and the nonuniformity correction of infrared target simulator.The major contents are as follows in general:Firstly,this paper analyzes the framework of the semi-physical simulation system,and expounds the influence of the nonuniformity of the infrared target simulator on the realism of the visual image.Secondly,the infrared radiation characteristics of aircraft and tail flame are studied,and the infrared image of aircraft target is generated by real-time rendering of OGRE.Finally,the nonuniformity of DMD is studied,and the nonuniformity correction algorithm of multi-point calibration is improved to realize the real-time nonuniformity correction.And the results of the calibration were analyzed.Through the generation of the aircraft target’s infrared image and the nonuniformity correction of the DMD simulator,the high realistic infrared target radiation of the aircraft target,which provides a high precision readiation source for the semi-physical simulation,is obtained.The paper’s results also provide a reference value for infrared indetificaiton and tracking in semi-physical simulation system.更多还原