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Abstract:
When the size of the detection target is small and is in the far distance, due to the small field of view of the photoelectric system, the effective pre-stage target guidance is the premise for the photoelectric system to track and point the target. The essence of target guidance is converting the target point under the geodetic coordinate system into the local coordinate system of the photoelectric system. Since a series of rotational and translational parameters will be introduced in this conversion process, the accuracy of these parameters will determine the ultimate target guidance accuracy. A guidance error correction method was proposed for the photoelectric system, namely acquisition-tracking-pointing (ATP) system, based on unmanned aerial vehicle (UAV) track, which used the track data around ATP system to solve optimal parameters for coordinate conversion in the process of computing target guidance data, thereby to improve the target guidance accuracy. Experimental device built for this project achieves the following results: the azimuth guidance standard variance is better than 0.052°, the elevation guidance standard variance is better than 0.04°, and the maximum error does not exceed 0.7°. The results also show that the higher the accuracy of pre-stage guidance, the faster the target acquisition speed of ATP system, which is of great significance for improving the corresponding speed of the target disposal.
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Keywords:
- target guidance /
- guidance error /
- target detection
摘要:在探测目标尺寸小且距离远时，由于光电系统的视场角很小，有效的目标前级引导是光电系统跟瞄目标的前提。目标引导的本质是将大地坐标系下的目标点转换至光电系统局部坐标系下，转换过程中引入一系列旋转和平移参数，其准确程度决定了最终的目标引导精度。提出基于无人机航迹的光电系统引导误差校正方法，通过围绕光电系统周围无人机航迹数据，求解引导数据计算过程中坐标变换的最优参数，进而提高目标引导精度。在本项目搭建的实验装置上实现了方位引导标准方差小于0.052°，俯仰引导标准方差小于0.04°，最大误差不超过0.7°。目标前级引导的引导精度越高，光电系统捕获目标速度越快，对于提高目标处置相应速度具有重要意义。
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