高超声速飞行器等离子鞘套反演分析

目前等离子体鞘套机理研究主要工作集中在理论模型的分析及地面模拟试验上，缺少真实试验数据的有效支撑，尤其缺少一套系统的试验数据分析方法。通过对等离子体鞘套无线通信试验数据进行数据反演分析，可以获得等离子体鞘套对不同频段无线信号的影响规律，并对等离子体鞘套仿真预测中涉及的流场、烧蚀、电磁计算等模型进行修正。等离子体数据反演分析方案中涉及到高精度链路计算、电子密度测量、飞行器外表面材料烧蚀碳化效应分析以及动态等离子体鞘套电磁分析建模等几项关键技术，通过对其分别进行技术突破，可提高等离子体数据反演分析的精度，使真实数据更为有效地修正理论分析模型。

Signal reversal of plasma sheath of hypersonic vehicles.

According to the experimental results of plasma sheath,signal reversal technology can be employed to analyze the influence of plasma sheath on electromagnetic waves propagation,and the experimental results can be furthermore summarized and compared with simulation results to modify the simulation models.In this paper,the signal reversal analysis method of plasma sheath is proposed,and several key technologies of signal reversal analysis are discussed,such as high-accuracy signal propagation link budget analysis,electron density measurement and prediction,evaluation of ablation and carbonization effect of spacecraft materials and electromagnetic modeling of high dynamic plasma sheath.Surmounting above technical difficulty can improve the accuracy of signal reversal analysis and also makes real data modify theoretical analysis model more effectively.