CAJ | 학술논문

高超声速飞行器再入大气层时，会在飞行器周围产生一层等离子鞘套，对测控信号的传输产生严重的影响。为分析等离子鞘套对测控信号的影响，提出了一种非均匀等离子鞘套自适应分层模型，并仿真计算了电磁波在RAM-C典型再入等离子鞘套中的透射衰减情况，进而得出各频段测控信号进出“黑障”的高度。经与NASA报告中实测数据进行对比，“黑障”高度吻合得很好。在实际型号试验中的应用也证明了该方法的有效性。结果表明，该方法可以较好地模拟测控信号在再入等离子鞘套中的传播情况，将来可用于对“黑障”现象的进一步研究。
고초성속비행기재입대기층시，회재비행기주위산생일층등리자초투，대측공신호적전수산생엄중적영향。위분석등리자초투대측공신호적영향，제출료일충비균균등리자초투자괄응분층모형，병방진계산료전자파재RAM-C전형재입등리자초투중적투사쇠감정황，진이득출각빈단측공신호진출“흑장”적고도。경여NASA보고중실측수거진행대비，“흑장”고도문합득흔호。재실제형호시험중적응용야증명료해방법적유효성。결과표명，해방법가이교호지모의측공신호재재입등리자초투중적전파정황，장래가용우대“흑장”현상적진일보연구。
In the reentry process of hypersonic vehicles,there is a layer of plasma sheath around the air-craft,which seriously influences the transmission of telemetry,track and command( TT&C) signals. An a-daptive stratified model of inhomogeneous plasma sheath is proposed to analyze the influence of TT&C sig-nals through plasma sheath. By simulating the transmission attenuation of electromagnetic waves in the RAM-C typical reentry plasma sheath,the blackout altitudes of TT&C signals are obtained. Comparing the results with the data in NASA's report shows the two correspond very well. The actual flight tests also demonstrate the effectiveness of this method. It indicates that the method can simulate the transmission characteristic of electromagnetic waves in reentry plasma sheath and can be used in further research of the blackout phenomenon.