基于面元分组遮挡算法的目标RCS并行计算
发布时间：2018-12-13 00:47
【摘要】：近年来科技飞速发展,计算电磁学取得了显著的进步。现代战争中,许多国家投入大量科研精力在隐身技术上,因为先进的隐身技术可以使用多种技术手段改变或者削弱目标的特征信息,有效迷惑敌方雷达探测系统,降低了被侦查到的几率,最大程度上延长了飞行器或者武器的生命周期。在电磁学领域,随着高频方法的不断完善,对复杂目标雷达散射截面的快速计算成为计算电磁学的一个重要课题。本文针对该问题进行了研究。对于一个复杂的目标模型,影响其雷达散射截面计算的的主要因素是剖分的面元数目和面元之间的遮挡判断。本文使用了物理光学方法对目标进行研究,并在程序设计软件层面和发挥多核计算机的优势硬件层面上对程序进行了优化。论文推导计算电磁学物理光学公式,成功将物理学公式过渡到程序语言。然后介绍计算机图形图像学领域的消隐算法,结合消隐算法的优点,引入了面元分组思想。针对平面三角形相交判定做出了优化,使用了三角形不相交理论,极大减少了运算量。最后对多核计算机硬件系统进行了原理上剖析,熟练运用多线程和多进程进行并行化程序思维,的充分发挥多核计算机硬件优势,使用OpenMP,将并行算法与物理光学算法结合,通过严谨合理的程序设计提升了计算目标雷达散射截面的速度。在算法软件层面和对多核利用硬件层面优化了计算程序,验证了加速比和并行效率。给出了复杂模型的RCS计算结果,效果与软件仿真结果相差无几,可以作为电大目标雷达截面物理光学方法研究领域的参考。
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN958
本文编号：2375550
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN958
【参考文献】
相关硕士学位论文 前1条
1 娄瑜雅;电大目标雷达散射截面高频方法的研究[D];南京理工大学;2008年
，本文编号：2375550
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