高超声速飞行器天线安装与布局研究

发布时间：2018-01-04 14:47

本文关键词：高超声速飞行器天线安装与布局研究　出处：《南京航空航天大学》2016年硕士论文　论文类型：学位论文

【摘要】：高超声速飞行器因其飞行速度快、射程远、突防能力强等优点,备受各军事大国追捧。本文针对高超声速飞行器体积小、天线表面隔热材料覆盖等新特点,以高度表天线与GPS天线为例,设计出高超声速度飞行器高度表天线和GPS天线具体安装方法,给出其在X-37B空天飞行器上布局方案,并分析飞行动态参数变化情况下温度、等离子体鞘套对天线辐射特性影响。论文的相关内容对我国高超声速飞行器天线安装与布局领域研究具有一定的参考价值。首先,针对高超声速飞行器热防护材料关键部件,利用电磁场理论分析热防护材料介电常数r?和损耗角正切tg?对远场透波性能影响,结果表明低介电常数、低损耗角正切的热防护材料具有优越的透波性能;其次,根据高超声速飞行器天线安装特殊要求,阐述介质覆盖情况下天线性能变化情况,设计并给出高度表天线和GPS天线安装模型详细参数,通过仿真探讨金属固定支架、天线罩、隔热垫片及隔热材料等关键结构对天线辐射特性影响;并给出高度表天线与GPS天线安装模型在X-37B空天飞行器中布局方案,仿真对比高度表天线与GPS天线加载前后辐射特性变化,研究高度表天线之间隔离度,给出影响高度表天线隔离度的原因及提高其隔离度具体措施,分析高度表天线与GPS天线之间互耦;最后,针对高超声速飞行器天线安装与布局设计方法,研究飞行状态下飞行器表面温度变化对天线辐射特性影响,仿真X-51A飞行器表面等离子体鞘套在不同厚度、电子密度以及碰撞频率情况下对天线电性能影响。本文针对高超声速飞行器给出两款静态情况下天线安装与布局方法,对高速飞行情况下动态参数变化对天线性能影响作相关的探讨,系统地阐述高超声速飞行器天线安装与布局思路,为后续高超声速飞行器多款涉及不同波段的天线安装与布局问题的研究奠定了基础。
[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.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V243.4

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