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针对临近空间高超声速飞行器的拦截问题,研究了拦截弹中末制导交接班时的导引头视角优化问题。首先,分析了临近空间大气环境及其对红外传输的影响,表明该空域适合红外探测器工作;然后,针对临近空间高超声速目标的红外特性设计了红外导引头方案;最后,将目标视为点源目标,建立了探测距离计算模型和大气透过率工程计算模型,研究了导引头探测距离与探测视角的关系。研究结果表明:针对临近空间高超声速目标,自上而下的探测方式有利于增加导引头探测距离;拦截弹中制导段弹道宜采用高抛再入式弹道。
In view of the interception problem of near-space hypersonic vehicle, the view optimization problem of seeker at the end of guided missile handover in interceptor is studied. First of all, the atmospheric environment in the near space and its influence on the infrared transmission are analyzed, which shows that the airspace is suitable for the infrared detector. Then, the infrared seeker scheme is designed for the infrared characteristics of the hypersonic targets in the near space. Finally, Point source target, the calculation model of detection distance and the calculation model of atmospheric transmittance are established, and the relationship between the seeker detection range and the detection angle is studied. The results show that the top-to-bottom detection method is suitable for increasing the seeker’s detection range for the near-space hypersonic target, and the high throw re-entry trajectory should be adopted for the guided ballistic trajectory of the interceptor.