發(fā)布時(shí)間：2018-12-13 00:47

【摘要】：近年來(lái)科技飛速發(fā)展,計(jì)算電磁學(xué)取得了顯著的進(jìn)步。現(xiàn)代戰(zhàn)爭(zhēng)中,許多國(guó)家投入大量科研精力在隱身技術(shù)上,因?yàn)橄冗M(jìn)的隱身技術(shù)可以使用多種技術(shù)手段改變或者削弱目標(biāo)的特征信息,有效迷惑敵方雷達(dá)探測(cè)系統(tǒng),降低了被偵查到的幾率,最大程度上延長(zhǎng)了飛行器或者武器的生命周期。在電磁學(xué)領(lǐng)域,隨著高頻方法的不斷完善,對(duì)復(fù)雜目標(biāo)雷達(dá)散射截面的快速計(jì)算成為計(jì)算電磁學(xué)的一個(gè)重要課題。本文針對(duì)該問(wèn)題進(jìn)行了研究。對(duì)于一個(gè)復(fù)雜的目標(biāo)模型,影響其雷達(dá)散射截面計(jì)算的的主要因素是剖分的面元數(shù)目和面元之間的遮擋判斷。本文使用了物理光學(xué)方法對(duì)目標(biāo)進(jìn)行研究,并在程序設(shè)計(jì)軟件層面和發(fā)揮多核計(jì)算機(jī)的優(yōu)勢(shì)硬件層面上對(duì)程序進(jìn)行了優(yōu)化。論文推導(dǎo)計(jì)算電磁學(xué)物理光學(xué)公式,成功將物理學(xué)公式過(guò)渡到程序語(yǔ)言。然后介紹計(jì)算機(jī)圖形圖像學(xué)領(lǐng)域的消隱算法,結(jié)合消隱算法的優(yōu)點(diǎn),引入了面元分組思想。針對(duì)平面三角形相交判定做出了優(yōu)化,使用了三角形不相交理論,極大減少了運(yùn)算量。最后對(duì)多核計(jì)算機(jī)硬件系統(tǒng)進(jìn)行了原理上剖析,熟練運(yùn)用多線程和多進(jìn)程進(jìn)行并行化程序思維,的充分發(fā)揮多核計(jì)算機(jī)硬件優(yōu)勢(shì),使用OpenMP,將并行算法與物理光學(xué)算法結(jié)合,通過(guò)嚴(yán)謹(jǐn)合理的程序設(shè)計(jì)提升了計(jì)算目標(biāo)雷達(dá)散射截面的速度。在算法軟件層面和對(duì)多核利用硬件層面優(yōu)化了計(jì)算程序,驗(yàn)證了加速比和并行效率。給出了復(fù)雜模型的RCS計(jì)算結(jié)果,效果與軟件仿真結(jié)果相差無(wú)幾,可以作為電大目標(biāo)雷達(dá)截面物理光學(xué)方法研究領(lǐng)域的參考。
[Abstract]:In recent years, with the rapid development of science and technology, computational electromagnetics has made remarkable progress. In modern warfare, many countries have invested a great deal of scientific research energy in stealth technology, because advanced stealth technology can use a variety of technical means to change or weaken the characteristic information of the target, and effectively confuse the enemy radar detection system. Reduces the probability of detection and maximizes the life cycle of an aircraft or weapon. In the field of electromagnetism, with the improvement of high frequency method, the fast calculation of radar cross section of complex target becomes an important subject of electromagnetic calculation. This paper studies this problem. For a complex target model, the main factor affecting the calculation of the radar cross section is the number of subdivided elements and the occlusion judgment between them. In this paper, the physical optics method is used to study the target, and the program is optimized at the software level of programming and the advantage of multi-core computer. In this paper, the physics optical formula of electromagnetics is deduced, and the physics formula is successfully transferred to the program language. Then, the blanking algorithm in the field of computer graphics and graphics is introduced. Combined with the advantages of the blanking algorithm, the idea of panel grouping is introduced. The theory of triangle disjoint is used to optimize the decision of planar triangle intersection, which greatly reduces the computation cost. Finally, the paper analyzes the principle of multi-core computer hardware system, skillfully uses multi-thread and multi-process to parallelize the program thinking, gives full play to the advantages of multi-core computer hardware, and uses OpenMP, to combine parallel algorithm with physical optics algorithm. The speed of calculating radar cross section of target is improved by strict and reasonable program design. The computation program is optimized at the software level and the hardware level of multi-core, and the speedup ratio and parallel efficiency are verified. The RCS calculation results of the complex model are given, and the results are similar to those of the software simulation results. It can be used as a reference in the research field of radar cross-section physical optics method for electrically large targets.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN958

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 婁瑜雅;電大目標(biāo)雷達(dá)散射截面高頻方法的研究[D];南京理工大學(xué);2008年

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本文編號(hào)：2375550