| 摘要: |
| 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。 |
| 关键词: 高超声速飞行器 测控信号 等离子鞘套 再入黑障 |
| DOI： |
|
| 基金项目: |
|
| Influence of reentry plasma sheath on TT&C signals transmission |
| ZHANG Zuo-yi,ZHAO Liang,LIU Xiu-xiang |
| () |
| Abstract: |
| In the reentry process of hypersonic vehicles,there is a layer of plasma sheath around the aircraft,which seriously influences the transmission of telemetry,track and command(TT&C) signals. An adaptive stratified model of inhomogeneous plasma sheath is proposed to analyze the influence of TT&C signals 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. |
| Key words: hypersonic vehicle TT&C signals plasma sheath reentry blackout |
《电讯技术》编辑部 