In order to study the space-based infrared remote sensing characteristics of hypersonic vehicles, this paper takes the simplified projectile model of HIFIRE-1 aircraft as the object to carry out simulation research. Firstly, the infrared radiation calculation model of the target projectile is established, including the aerodynamic thermal effect engineering simulation model, the projectile temperature calculation model and the projectile infrared radiation calculation model; Secondly, the space-based infrared detection model of hypersonic targets by calculating the spectral contrast between the target and the background is established; Finally, space-based infrared remote sensing characteristics of high orbit infrared early warning satellite for hypersonic vehicles under typical conditions are simulated and analyzed. The results show that, when the hypersonic vehicles fly at a speed of 6Ma at 25km, the detection ability of high orbit infrared early warning satellite for hypersonic target projectile is weak.
Hypersonic cruise vehicles emit intense infrared radiation when maneuvering at high speed in the near space, which highlights the practical significance of studying their infrared remote sensing characteristics. This paper makes a survey on the previous research into the infrared radiation characteristics of scramjet plumes, the infrared radiation characteristics of hypersonic cruise vehicle bodies and the infrared remote sensing characteristics of hypersonic cruise vehicles in the near space. Survey results show that, tentative studies have been carried out on infrared remote sensing technologies for hypersonic cruise vehicles, but more thorough and systematic research need to be conducted in depth. Further studies should focus on the infrared remote sensing mechanism of hypersonic cruise vehicles in the near space, and specific research is supposed to be targeted in particular to calculate the total infrared radiation intensity, with not only the infrared radiation of scramjet plumes and vehicle bodies taken into account, but also atmospheric attenuation and background radiation into consideration.
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