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为解决自动跟踪过程中目标被遮挡导致丢失的问题,提出一种光电观瞄系统抗目标遮挡的自动跟踪控制方法。在正常跟踪状态时记录当前跟踪控制命令,当目标被遮挡后控制系统进入记忆跟踪状态时,对记录的若干组控制命令进行二次曲线拟合,预测出目标遮挡过程中的控制命令,从而预测目标的运动轨迹,保证自动跟踪的稳定性和可靠性。在目标突然转向或作变加减速运动的情况下,二次曲线拟合的预测误差不大于6%,远小于线性拟合的预测误差73%。该方法已被某型光电观瞄系统挂飞试验进行了验证,结果表明:在目标被短暂遮挡时,观瞄系统自动跟踪过程平稳,瞄准线稳定。
In order to solve the problem that the target is blocked in the process of automatic tracking, this paper proposes an automatic tracking control method of the photoelectric sighting system against the target occlusion. When the target is blocked, the control system enters the memory tracking state and performs quadratic curve fitting on the recorded sets of control commands to predict the control commands in the target occlusion process to predict the current tracking control commands. The trajectory of the target, to ensure the stability and reliability of automatic tracking. The prediction error of quadratic curve fitting is no more than 6% when the target is suddenly turned or decelerated, which is far less than the predicted error of linear fit of 73%. The method has been validated by the flying test of a photoelectric sighting system. The results show that when the target is briefly obscured, the automatic tracking system of the sight-seeing system is stable and the line of sight is stable.