靶机红外特性实验与建模研究

Experimental and modeling research on infrared characteristics of a target

针对靶试过程中对目标红外特性模拟的具体需求,研究一种基于三维几何遮挡的目标全向红外辐亮度特征简化建模方法。通过将目标主要红外辐射部件等效为与飞行状态相关的三维红外光源,并计算目标主要红外辐射源经机身几何遮挡后在各空间观察位置处所形成的辐照度,建立目标全向红外辐亮度模型。通过与靶机红外特性实测结果对比,验证模型的准确性,为该领域提供一种在工程应用条件约束下,精度适中的目标红外特征建模技术。

Aiming at the specific requirements of target infrared characteristic simulation in the process of target test,a simplified modeling method of target omnidirectional infrared radiation luminance feature based on three-dimensional geometric occlusion was studied.The infrared radiation components of the target were equivalent to a three-dimensional infrared light source related to the flight state,and the irradiance formed in the observation position of each space after the main infrared radiation source is calculated,so as to obtain the omnidirectional infrared radiance model of the target.By comparing with the measured results of infrared characteristics of target,the accuracy of the model is verified,so as to provide a target infrared feature modeling technology with moderate precision under the constraints of engineering application conditions in this field.