【作者】 刘安昌；

【导师】 张建奇；

【作者基本信息】 西安电子科技大学 ， 物理电子学， 2007， 硕士

【摘要】 本文主要研究红外烟幕干扰效果仿真及评价方法,分析影响干扰效果的因素,从而为红外烟幕武器的发展提供一定的理论指导和支持。本文通过分析烟幕对红外成像系统的干扰机理,利用数值计算和随机模拟两种方法实现对红外烟幕干扰效果的仿真及评价。具体开展的工作有:第一,建立了红外烟幕消光模型,实现了烟幕干扰条件下红外光谱透过率的数值计算方法,依据仿真曲线定量地分析了多种因素(烟幕浓度、厚度等)对烟幕干扰效果的影响,并基于消光模型仿真了烟幕干扰效果的图像;第二,提出了基于调制传递函数的烟幕干扰效果仿真及评价方法,建立了相应的数学模型,根据仿真曲线分析影响干扰效果的因素,并与消光模型进行比较讨论,然后给出了基于此模型的仿真图像;第三,引入蒙特卡罗仿真方法,从随机模拟和统计试验的角度上实现了烟幕干扰效果的仿真,给出了具体实现的算法以及仿真得到的干扰效果图像。更多还原

【Abstract】 The simulation and evaluation methods of the infrared smoke interference effects, as well as the factors that affect the interference effects, are dealt with in this paper. The work done in the paper will theoretically guide the practical development of the infrared smoke weapons.The basic principles of the interference effects of smoke on the infrared image system are analyzed, and the simulation and evaluation of the interference effect of the infrared smoke are done based on the numerical method and the random simulation method. The main scope of this paper is consisted of three parts. Firstly, the extinction model the infrared smoke is established. The numerical methods to calculate the transmissivity of the infrared spectrum with the existence of the infrared smoke is proposed, factors that impact the interference effects, such as the concentration and the thickness of the infrared smoke are discussed quantitatively according to the simulation curves, and the interference effects of the infrared smoke are shown with simulated images. Secondly, a novel simulation and evaluation method based on the modulation transfer function (MTF) is proposed in this paper. The corresponding mathematic model is established. Based on the simulation curves, the factors that impact the interference effects are analyzed and compared to those of the extinction model. Then simulation images based on the MTF model are generated. Thirdly, the Monte Carlo method is introduced, and simulation of the interference effects of the infrared smoke is realized from the viewpoint of random simulation and statistical test. The algorithm, as well as the simulated images is given in detail.更多还原