终端红外图像制导信息处理技术研究

弹道终端目标图像充满视场时的跟踪点选择和继续跟踪能力是第四代先进空空导弹必须具备的性能.文中分析了弹道终端导引头图像跟踪过程,建立了图像探测器投影成像模型,研究了红外成像制导型空空导弹弹道终端目标图像的变化规律、弹目距离和相对速度对目标图像变化情况的影响及中段形心跟踪模式与末端局部图像跟踪模式的转换时机,提出了一种有利于减小成像导引头跟踪盲区、提高起爆控制精度的局部图像跟踪算法,该算法通过对机头部位的识别来确定局部图像跟踪点,并估算目标易损部位,从而为实现最优起爆控制奠定了基础.最后,对文中提出的算法用实际红外图像进行了仿真,其结果表明该算法是可行和有效的.

INFRARED IMAGE GUIDANCE INFORMATION PROCESSING FOR THE ENDGAME

When the image of target fills full in the field of view, the ability of tracking point selection and continuable tracking is very important in a fourth-generation advanced air-to-air missile. The process of image tracking for the endgame was first analyzed, then a model of perspective projection for the imaging detector was provided. The rule of change of target image in the endgame was studied, and the effect of missile-target distance and relative velocity on aircraft imaging was analyzed. The switching from centroid tracking to partial tracking was studied, and a partical image tracking algorithm that can benefit in decreasing the blind area and improving the burst control precision was proposed. This algorithm fixes the tracking point for partial image tracking through the recognition of aircraft nose cone, and realizes the optimal burst control. Finally, some experiments were carried out with real infrared image of aircraft. The experimental results show that the algorithm provided in this paper is feasible and effective.