本文關(guān)鍵詞：高超聲速飛行器天線安裝與布局研究　出處：《南京航空航天大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 高超聲速飛行器 天線安裝 天線布局 隔離度 等離子體鞘套 飛行器天線

【摘要】：高超聲速飛行器因其飛行速度快、射程遠(yuǎn)、突防能力強(qiáng)等優(yōu)點(diǎn),備受各軍事大國(guó)追捧。本文針對(duì)高超聲速飛行器體積小、天線表面隔熱材料覆蓋等新特點(diǎn),以高度表天線與GPS天線為例,設(shè)計(jì)出高超聲速度飛行器高度表天線和GPS天線具體安裝方法,給出其在X-37B空天飛行器上布局方案,并分析飛行動(dòng)態(tài)參數(shù)變化情況下溫度、等離子體鞘套對(duì)天線輻射特性影響。論文的相關(guān)內(nèi)容對(duì)我國(guó)高超聲速飛行器天線安裝與布局領(lǐng)域研究具有一定的參考價(jià)值。首先,針對(duì)高超聲速飛行器熱防護(hù)材料關(guān)鍵部件,利用電磁場(chǎng)理論分析熱防護(hù)材料介電常數(shù)r?和損耗角正切tg?對(duì)遠(yuǎn)場(chǎng)透波性能影響,結(jié)果表明低介電常數(shù)、低損耗角正切的熱防護(hù)材料具有優(yōu)越的透波性能;其次,根據(jù)高超聲速飛行器天線安裝特殊要求,闡述介質(zhì)覆蓋情況下天線性能變化情況,設(shè)計(jì)并給出高度表天線和GPS天線安裝模型詳細(xì)參數(shù),通過仿真探討金屬固定支架、天線罩、隔熱墊片及隔熱材料等關(guān)鍵結(jié)構(gòu)對(duì)天線輻射特性影響;并給出高度表天線與GPS天線安裝模型在X-37B空天飛行器中布局方案,仿真對(duì)比高度表天線與GPS天線加載前后輻射特性變化,研究高度表天線之間隔離度,給出影響高度表天線隔離度的原因及提高其隔離度具體措施,分析高度表天線與GPS天線之間互耦;最后,針對(duì)高超聲速飛行器天線安裝與布局設(shè)計(jì)方法,研究飛行狀態(tài)下飛行器表面溫度變化對(duì)天線輻射特性影響,仿真X-51A飛行器表面等離子體鞘套在不同厚度、電子密度以及碰撞頻率情況下對(duì)天線電性能影響。本文針對(duì)高超聲速飛行器給出兩款靜態(tài)情況下天線安裝與布局方法,對(duì)高速飛行情況下動(dòng)態(tài)參數(shù)變化對(duì)天線性能影響作相關(guān)的探討,系統(tǒng)地闡述高超聲速飛行器天線安裝與布局思路,為后續(xù)高超聲速飛行器多款涉及不同波段的天線安裝與布局問題的研究奠定了基礎(chǔ)。
[Abstract]:Hypersonic vehicle is popular in various military countries because of its fast flying speed, long range, strong penetration ability and so on. This paper aims at the new characteristics of hypersonic vehicle such as small size, heat insulation material covering antenna surface, and so on. Taking altimeter antenna and GPS antenna as an example, the installation method of altimeter antenna and GPS antenna for high ultrasonic velocity vehicle is designed, and the layout scheme on X-37B aircrafts is given. The temperature of flight dynamic parameters is analyzed. The influence of plasma sheath on the radiation characteristics of the antenna. The related contents of this paper have a certain reference value for the field of antenna installation and layout of hypersonic aircraft in China. In view of the key components of thermal protection materials for hypersonic aircraft, the dielectric constant r? And loss angle tangent TG? The results show that the thermal protective materials with low dielectric constant and low loss angle tangent have superior transmittance. Secondly, according to the special requirements of the hypersonic vehicle antenna installation, the antenna performance changes under the condition of dielectric coverage are described, and the detailed parameters of the altimeter antenna and GPS antenna installation model are designed and given. The effects of metal fixed support, antenna radome, heat insulation gasket and heat insulation material on the radiation characteristics of the antenna were investigated by simulation. The layout scheme of altimeter antenna and GPS antenna installation model in X-37B spaceflight vehicle is given. The radiation characteristics of the altimeter antenna and GPS antenna are simulated and compared before and after loading. The isolation degree of altimeter antenna is studied, the reason of influencing the isolation degree of altimeter antenna and the concrete measures to improve the isolation degree are given, and the mutual coupling between altimeter antenna and GPS antenna is analyzed. Finally, aiming at the antenna installation and layout design method of hypersonic vehicle, the effects of surface temperature change on antenna radiation characteristics in flight state are studied. Simulation X-51A aircraft surface plasma sheath at different thickness. The effects of electron density and collision frequency on the electrical performance of the antenna. This paper presents two methods of antenna installation and layout for hypersonic aircraft under static conditions. The effects of dynamic parameters on antenna performance under high speed flight are discussed. The antenna installation and layout of hypersonic vehicle are systematically described. It lays a foundation for the research of antenna installation and layout in different bands of hypersonic aircraft.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：V243.4

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