针对远距航空相机视场角较小的问题,介绍了目前常用的几种像移补偿技术,并对各种补偿方法进行了比较。采用小面阵相机并结合系统光学元件通过在横滚方向的摆扫实现大场景地面成像,对摆扫过程进行了数学分析,得出了摆扫所需的扫描指令。通过仿真实验验证了推导的数学公式的正确性,仿真结果表明,应用该扫描指令即可通过小面阵航空相机实现地面大场景图像的获取。

Spectral imaging detection technology combines imaging technology and spectral technology, which can provide rich information of the target scene.The multi-spectral imaging detection technology is studied in detail, and multi-spectral camera of unmanned aerial vehicle is designed for the camouflage target reconnaissance.The calculation method of multi-spectral reconnaissance detection and recognition is analyzed emphatically.Experimental results show that the efficiency of multi-spectral reconnaissance performance is improved by 20％～50％.

为方便操作员快速捕捉并瞄准目标,提出一种适用于机载光电观瞄系统的线性运动补偿方法.该方法借助地面目标相对载机在初始‘东北天’坐标系下的速度矢量进行分解,得出目标相对光电系统在惯性坐标下的角速度,并根据解算出的角速度值实时进行伺服补偿,驱动光电转塔于手动模式下,当操作员不操控光电转塔时,系统的瞄准线能够自动地指向地面目标区域.该方法已在某型无人机用光电观瞄系统挂飞试验中进行了验证,结果表明:在电视观瞄具的小视场(0.7°×0.5°)下,地面目标点、瞄准线指向点相对载机点的张角在方位和俯仰方向均小于该视场的1/6.

Traditional single target position finding method can not fit the condition that the situation of modern war field changes in real time and has many targets.In order to enhance the efficiency of target positioning,this paper developed a new semi-active multi-target positioning algorithm for airborne optoelectronic system on the basis of single target position finding.Through establishing the initial east-north-up(ENU) coordinates,aeroplane ENU coordinates,crankshaft coordinates,EO stabilized-aiming coordinates and multi-target projection coordinates,a series of coordinates transform formulas using the relative angles of target were derived,which could calculate the longitudes and latitudes of multi-target.The result of computer emulation showed that this algorithm could calculate the latitudes and longitudes of multi-target at the same time.The positioning precision of hypo-targets was lower than that of the main target because of the increased accumulated error of coordinates transforming by the pixel deviation.