隐身飞机红外辐射特性测试评估方法探讨

Evaluation method of stealth aircraft′s infrared radiation measurement

针对隐身飞机研制和作战使用研究的需要,对隐身飞机红外辐射特性的测试评估方法进行理论探讨。阐述了将理论分析、数值仿真和实验测试相结合的隐身飞机红外辐射测试评估理论,给出了一种兼顾实时性与精确性,能够全面反映飞机隐身性能的评估方案,即通过数值计算找出隐身技术、干扰环境、飞行状态对飞机红外辐射特征的影响规律,通过实验对影响规律进行了验证和完善,由此建立隐身飞机红外辐射特征评估软件,说明了其中应解决的关键问题。应用该测试评估方法建立了F-22隐身飞机的快速成像仿真软件,将软件生成的红外图像与实拍图像相比较,初步证明了该方法的可行性和有效性,并评估了部分隐身技术对图像特征的影响。

In order to meet the requirements of stealth aircraft＇s development and operation, evaluation method of stealth aircraft＇s infrared radiation measurement was discussed theoretically. The evaluation theory of stealth aircraft＇s infrared radiation measurement was elaborated, which combined theoretical analysis, numerical simulation and experimental measurement effectively. Taking into account both rapidity and accuracy, an evaluation method which could reflect aircraft＇s stealth capability roundly was advanced： find the influence laws of stealth technics, flying states, and interfere environments on aircraft＇s IR radiation by numerical calculation, which were validated and consummated by experiment. Then, the software of evaluating stealth aircraft＇s IR radiation characteristics was built. And several key problems in this evaluation method were explained. According to the given evaluation method, a software of F-22＇s rapid IR gray image generation was built. This method＇s feasibility and validity were proved preliminarilyby comparing the IR gray images generated from the software and infrared thermal imager. And the influences of several IR stealth technics on IR gray image＇s characteristics were evaluated.