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飞行目标落地参数是评定飞行目标系统性能的重要技术指标。为了测量飞行目标落地参数,采用放置在落弹点区域附近的凝视等待式双目视觉摄像机,高速摄像交汇测量飞行目标的落地参数。由最小二乘法拟合目标各时刻质心的空间三维坐标,建立了目标三维空间轨迹的多项式函数,对多项式函数求导得到目标的飞行速度。针对回转体类飞行目标特点,根据其在摄像机像面成像的情况,将目标分为三类,采用了不同的姿态测量方案,并对测量的误差来源进行了分析,提出了减小测量误差的方法。实验与理论分析表明,所采用的速度与姿态测量方法正确、可靠,速度的测量误差小于1%,大目标和过渡目标姿态角测量误差小于0.5°,为飞行目标的动态参数测量提供了一条新的便捷可靠的途径。
Flight target landing parameters is to assess the performance of the flight target system important technical indicators. In order to measure the landing parameters of the landing targets, a staring-waiting binocular vision camera placed in the vicinity of the landing point is used to measure the landing parameters of the flying target at a high-speed camera intersection. The least square method was used to fit the three-dimensional coordinates of the centroid of the target at each moment, and the polynomial function of the trajectory of the target was established. The polynomial function was used to derive the target flight velocity. According to the characteristics of the rotary target, the targets are divided into three categories according to their imaging conditions on the camera. Different attitude measurement schemes are adopted and the sources of measurement error are analyzed. The measurement error reduction method. The experimental and theoretical analysis shows that the adopted velocity and attitude measurement methods are correct and reliable, the measurement error of velocity is less than 1%, the error of attitude measurement of large target and transitional target is less than 0.5 °, which provides a new measure for the dynamic parameter measurement of flight target Convenient and reliable way.