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航空侦察是为获取敌情、地形和有关作战情报而采取的重要手段,各种电磁信号侦察、光电信号侦察在同一飞机平台的应用越来越广泛,电磁信号侦察以及地面其他系统发现目标后,通过目标的位置信息引导光电侦察系统对目标进行搜索、跟踪、查证的应用也越来越多。当机载光电平台接收到目标的坐标值后,自行接收GPS和惯导信息,并实时解算出被测目标在光电平台坐标系下的方位角和俯仰角,引导目标进入光学载荷视场内,并用图像视频跟踪的方法捕获和跟踪目标。针对飞机平台对地面固定目标或者运动目标的引导进行研究,将目标点坐标从大地坐标系转换到光电平台载机坐标系,并建立自主引导测量方程,利用蒙特卡罗统计的方法分析自主引导测量方程中各个误差因素对最终引导精度的影响,针对如何提高引导精度提出了一些建议。并在某光电平台上进行飞行试验验证,目标均能很好地进入跟踪视场内,完成捕获、跟踪功能。
Aerial reconnaissance is an important means for obtaining enemy sentiment, topography and relevant operational intelligence. Various electromagnetic signal reconnaissance and optical signal reconnaissance are applied more and more widely on the same aircraft platform. After electromagnetic signal reconnaissance and other ground-based system discovery targets are passed, The location of the target information to guide the photoelectric reconnaissance system to search the target, tracking, verification of more and more applications. After receiving the target coordinate value, the on-board photoelectric platform receives the GPS and inertial navigation information by itself and real-time calculates the azimuth and the elevation angle of the measured target in the optical platform coordinate system to guide the target into the optical load field of view, And use image video tracking method to capture and track the target. Based on the guidance of the aircraft platform on the fixed target or the moving target on the ground, the coordinates of the target point are transferred from the coordinate system of the earth to the carrier coordinate system of the photoelectric platform, and the autonomous guidance measurement equation is established. The autonomous guidance measurement is analyzed by means of Monte Carlo statistical method In the equation, the influence of each error factor on the final guidance accuracy is put forward. Some suggestions are put forward on how to improve the guidance accuracy. And in a photoelectric platform for flight test validation, the target can well into the tracking field of view, to complete the capture and tracking functions.