空间目标抖动状态红外图像仿真建模研究北大核心CSCD

空间目标容易受到太空垃圾碰撞及干扰从而产生抖动。针对空间抖动目标红外图像的模型构建问题,对天基空间红外成像系统的主要噪声进行分析并考虑杂散光影响,基于Creator与Vega软件平台相结合,提出抖动状态下空间目标表面缺陷的红外图像的建模方法。依据空间目标基本特征分析其红外辐射特性,在Creator中对空间目标缺陷进行三维建模;根据目标以及背景红外辐射特性对三维模型进行温度场分析,将分析所得结果与Vega红外模块相结合获得红外图像模型;确定抖动图像数学模型并对仿真图像施加抖动影响,然后施加杂散光影响获得最终模拟图像。实验结果表明:该方法生成的抖动状态下空间目标红外图像与实验图像相似程度高,能为空间目标探测与态势感知提供一种有效的模拟系统。

Simulation modeling of infrared images of space targets in jitter state

The space targets are susceptible to jitter by space junk collision and interference. Aiming at the problem of model construction of infrared images of space targets in jitter state, the main noise of space-based infrared imaging system was analyzed, and the effect of stray light was considered. Based on the combination of Creator and Vega software platform, a modeling method of infrared images of space targets with surface defects in jitter state was proposed. The infrared radiation characteristics of space targets were analyzed according to their basic characteristics, and the 3D modeling of space target defects was carried out in Creator. The temperature field of the 3D model was analyzed according to the infrared radiation characteristics of the target and background, and the infrared image model was obtained by combining the analysis results with Vega infrared module. The mathematical model of jitter image was determined and the jitter effect was applied to the simulation image, and then the stray light effect was applied to obtain the final simulation image. The experimental results show that the infrared images of space targets in jitter state generated by this method are highly similar to the experimental images, which can provide an effective simulation system for space target detection and situation awareness.