摘要
针对飞行器的红外隐身问题,推导出红外辐射对比度与作用距离的理论关系,采用指数拟合获得大气透过率与作用距离的近似关系表达式,简化了对作用距离的计算,并通过实际算例考察了目标表面温度、目标发射率和飞行速度对红外辐射对比度及作用距离的影响。结果表明:对比度和作用距离随目标表面温度、发射率及飞行速度的下降趋势基本一致;在一定条件下,对比度可代替作用距离作为评价目标红外隐身效果的简单、快速的参数,对比度越小目标的红外隐身效果越好。对比度的计算快速、准确、灵活性强和适用范围广,为今后进一步对飞行器的红外隐身研究提供一定的理论参考。
Aiming at the issue of aircraft infrared camouflage,the relationship between the infrared contrast and the operating range of an infrared system was deduced,an approximate expression for the relation between the atmospheric transmittance and operating range was obtained through exponential fitting,and a simplified method of calculating the operating range was developed. The influences of major factors on infrared contrast and operating range,such as the target external temperature,the infra-red （IR） emissivity of the target,and the flight speed,were also studied by theoretical analysis. The results show that infrared contrast and operating range exhibit basically the same trend of being lowered by decreasing the target temperature,emissivity,and flight speed. Under certain conditions,infrared contrast could take the place of operating range to serve as a convenient parameter for predicting the infrared camouflage effect of an aircraft. The infrared camouflage of an aircraft would have better effect with smaller infrared contrast. The rapidity,accuracy,flexibility and large application scope of infrared contrast calculation provide certain theoretical reference for further study on infrared camouflage of aircraft.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2008年第6期1592-1597,共6页
Acta Aeronautica et Astronautica Sinica
关键词
红外隐身
评价
飞行器
红外辐射对比度
作用距离
infra-red camouflage
evaluation
aircraft
infrared contrast
operating range
