【作者】 许占显；

【导师】 林为干；

【作者基本信息】 电子科技大学 ， 电磁场与微波技术， 2008， 博士

【摘要】 隐身技术是改变武器装备、平台等目标的可探测信号特征,使敌方探测系统难以发现或发现距离缩短的综合技术,是武器装备现代化和军事变革的重要标志之一,将给未来世界军事斗争和战争模式带来重大变革。腐蚀与裂纹等缺陷影响飞机的隐身性能和飞行安全,因此缺陷探测在航空领域十分重要。本论文应用周期性几何结构研究了新的隐身超电磁材料,探索拓展隐身频带宽度的可控隐身技术,即主动隐身技术。从电磁学的角度,研究了缺陷电磁探测问题和缺陷对隐身性能的影响;提出了利用可控超电磁结构技术来实现隐身的技术途径,将微型化的超电磁材料与电磁“滑变”理论相结合,将很可能突破传统的隐身理念,实现宽频带、多方位隐身。本文的主要内容为:1.详细论述了国内外隐身技术与武器装备的状况,研究了隐身、反隐身技术的发展趋势,表明超电磁可控材料、多频谱隐身材料和智能型隐身材料将成为电磁隐身的最主要的发展方向。2.详细研究了周期性几何结构与超电磁材料的电磁特性。基于电磁波反射、透射、正(负)折射理论,构造并研究了新型吸波材料与结构(铁氧体衬底-手征性材料、超电磁材料、卡西尼卵形截面结构)的电磁特性,得出通过控制超电磁材料结构可以扩展现有隐身技术的隐身手段。3.研究腐蚀与裂纹缺陷的探测和缺陷对隐身性能的影响,探索了缺陷的电磁原位探测新技术,应用交变电磁场方法原位探测了飞机发动机的叶片裂纹。并研究了早期预测突变断裂的可行性。4.突出了射频与无线电管理在隐身技术中的重要性,阐述了发展隐身战术、程序开发以及电子对抗等主动隐身技术。研究了隐身技术的不足与反隐身的可行性,以及利用天基雷达探测隐身目标等。更多还原

【Abstract】 Stealth technology is taken as the synthesis technology which can change the scattering character of weapon equipments and platforms, and make them difficultly found by enemy. It is one of the importance symbols of the weapon equipment modernization and military technology revolution, and will bring great change to the future world warfare and war mode. Flaws as erosion,crack,etc. influence stealth performance and airplane safety, so flaw detection is a very important issue in aviation. In this thesis, some of new stealth electromagnetic materials and structures are proposed based on the periodic geometry, and the controllable stealth technology is investigated to expand the stealth bandwidth. Flaw electromagnetic detection and its impact on stealth effect have been studied and analyzed from the point view of the electromagnetism. Using controllable metamaterial, a new idea of stealth is developed. Combing tiny metamaterial with electromagnetic "Hua bian" theory may be a breakthrough of the traditional stealth technology, so as to realize ideal stealth performance.The main contents are as follows:1. The status of stealth technology and weapon equipment has been discussed. Stealth and counter stealth technologies as well as their development trends are studied. The result indicates that controllable metamaterial, multi-frequency chart material and intelligent stealth material will become the uppermost candidates for the electromagnetic stealth technology.2. The electromagnetic characteristics of some periodic structures and metamaterial have been studied. Novel absorption materials and structures (ferrite base-chiral materials, metamaterial, Cassinian oval curves section structure) have been constructed and researched based on electromagnetic wave reflection, transmission, and positive or negative refraction theories. The studies demonstrate that, as a new method, the controllable metamaterial can obtain a good performance of electromagnetic wave stealth.3. The flaw detection and the influence of the flaw on stealth performance are studied and a novel electromagnetic detection on site for flows is investigated as well. This proposed method is used to probe aircraft engine blade cracks. Also feasibility for sudden change failure prediction has been analyzed.4. Radio frequency management technology on stealth is emphasized. Tactics, program and electron counter in the active stealth technology are expounded. The disadvantages of stealth technology and the feasibility of counter-stealth, and test stealth target by space-based radar are studied.更多还原