【作者】 罗来科；

【导师】 宣益民；

【作者基本信息】 南京理工大学 ， 兵器发射理论与技术， 2009， 博士

【摘要】 目标红外辐射特性研究是国内外在红外领域研究的热点之一,在目标探测、精确跟踪与制导等领域具有重要的意义。本文选择了我国最先进的登陆作战水陆坦克为研究对象,针对其中的主要内容进行研究。本文对影响水陆坦克红外辐射特性的一些主要因素进行分析,对水陆坦克与背景的红外辐射特性的建模方法进行了研究,对水陆坦克与背景红外辐射图像的合成方法进行了探讨。本文的工作主要包括以下几个方面:(1)对水陆坦克进行了网格划分根据坦克的几何结构特征,用Delaunay方法实现了水陆坦克表面的非结构化网格的划分,然后用分层的方法实现三棱柱单元的划分。(2)建立了水陆坦克红外辐射特性模型考虑水陆坦克与周围背景之间的换热、水陆坦克自身的内热源影响以及水陆坦克各部分之间的热量传递,在构建水陆坦克的车体温度模型、射击和非射击状态下火炮身管温度的计算模型的基础上,建立了水陆坦克整体温度计算模型,系统地建立了水陆坦克红外辐射特性的分析方法,计算了水陆坦克的整体红外辐射特性。(3)建立了海滩地表背景红外辐射特性模型考虑海滩地表背景吸收的太阳辐射、大气长波辐射、海滩地表的自身辐射、海滩地表与环境间的显热交换和潜热交换等因素对海滩地表背景红外辐射特性的影响,建立了海滩地表的三维温度场和红外辐射计算模型。提出了利用三维温度和红外辐射模型计算复杂地面背景温度和红外辐射特性的简化方法。(4)建立了海洋背景的红外辐射特性模型建立了三维随机海浪的数学模型,并对海浪进行了数值模拟;考虑海面自身的热辐射以及对太阳与大气辐射的反射等因素、建立海面红外辐射的模型,获得了其红外辐射特性热像。(5)提出了水陆坦克的红外热图像和背景红外热图像的生成方法根据计算机图形学的基本原理,建立了水陆坦克红外图像的生成方法。生成了背景和水陆坦克的红外模拟图像。更多还原

【Abstract】 Research on the infrared features of target is one of the most important aspects during infrared application. It is of momentous significance in detecting target and curate tracting targets. The main researching contents of this thesis is the infrared features of the amphibious tank, Main factors that affect the infrared features of the amphibious tank were analyzed in this paper. The method for the simulation of the amphibious tank and the background infrared features was studied. The synthesizing method of the infrared images for the target and background and the simulation method for the missile-target meeting progress were also discussed in the paper. The main work of the paper includes:(1) meshes on the amphibious tank were generatedUnstructured surface meshes on the amphibious tank were generated by Delaunay method , which was on the basis of the surface geometry. Then 3D rectangle triangular prima elements were generated by dividing the amphibious tank into several layers.(2) The infrared feature models of the amphibious tank were developedConsidering the effects of the heat exchange with the surround background, the heatgenerations relevant with the working status, and the heat transfer between the different parts of the amphibious tank, a temperature model of the amphibious tank were developed based on the temperature models for the vehicle body, the temperature model for calculating the gun barrel on the shooting state and the non-shooting state have been established. The temperature distribution of the amphibious tank was also calculated. The systematical analysis methods were established for the analysis of the infrared features of the amphibious tank. The infrared feature of the amphibious tank was calculated. The generating mechanism and the changing regulation of the infrared feature of the amphibious tank are revealed.(3) The infrared feature models of the beach terrain background were establishedConsidering the short wave solar radiation and the long wave air radiation absorbed bythe beach terrain surface, apparent heat exchange and latent heat exchange between the terrain surface and the background, the temperature and infrared feature models were established for the beach terrain. The method with three-dimensional temperature and infrared model to calculated the temperature and infrared feature of the complex beach terrain background were put forward in the paper.(4) The infrared feature model of the ocean background was established The mathematical model of the three-dimensional random waves was developed, three-dimensional random waves were simulated. Considering oceanic radiation and the reflection of radiation of the sun and the sky, the infrared feature model of the ocean background was established, the infrared feature images of the ocean background were achieved.(5) The generation methods of the infrared images of the amphibious tank and the background were put forward.The generation methods of the infrared images of the amphibious tank were put forward based on the fundamental of the computer graphics. The simulated infrared images of the amphibious tank and the background were generated.更多还原