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为解决低幅宽卫星载荷因幅宽小而导致成像覆盖物面窄、效率低、使用复杂的缺陷,提出了一种多条带拼接成像路径自主规划方法。先完成单次侧摆成像规划:通过卫星、目标相对位置关系判断成像时机,规划包括姿态机动开始时刻、成像开始时刻、成像结束时刻、滚动目标姿态角,以及可成像总时长的成像时域确定。再进行多条带拼接成像规划:由成像开始时刻及姿态偏置要求确定条带拼接方向,计算图像拼接点位置参数;根据满足载荷成像最大允许俯仰姿态机动角和姿态机动速度,确定相邻次成像开始时刻卫星位置与姿态机动开始时间;由成像时刻的轨道位置、前后摆俯仰姿态角、图像拼接点位置及侧摆成像偏流角计算相邻次成像滚动目标姿态;根据确定的滚动、俯仰目标姿态角和成像位置迭代计算偏流角,确定偏航目标姿态。给出了相应的单次侧摆成像路径和最大面积多条带拼接成像路径的自主规划计算流程。仿真结果表明:该方法能根据卫星姿态机动能力、轨道参数及载荷视场角自主完成成像条件分析及路径规划,实现载荷对目标区域无盲区最大幅宽成像,提高成像效率及卫星在轨任务自主规划执行能力。
In order to solve the shortcomings of the low-amplitude satellite payload due to its small width and narrow imaging coverage, low efficiency and complexity of use, a multi-band splicing imaging path autonomous planning method is proposed. First, the imaging planning of single-side-to-side imaging is completed. The timing of imaging is determined by the relative position of the satellite and the target. The planning includes the time of starting the maneuver, the starting time of the imaging, the ending time of the imaging, the attitude of the rolling target and the imaging time domain of the imageable total time . Then the multi-stitching imaging planning is carried out: the stitching direction of the stitching is determined according to the imaging start time and posture bias, and the position parameters of the stitching point are calculated; and according to the maximum allowable pitch attitude maneuvering speed and the attitude maneuvering speed of the load imaging, The position of the satellite at the start of the imaging and the start time of the attitude maneuver are calculated; the next-time secondary imaging scrolling target attitude is calculated from the orbital position at the imaging moment, the pitch attitude of the front-back tilting, the position of the image splicing point and the drift angle of the side-to- The attitude angle and the imaging position are iteratively calculated to calculate the drift angle to determine the yaw target attitude. The autonomic planning and calculation process of the corresponding single-side-to-side imaging path and the maximum area and multi-strip stitching imaging path are given. The simulation results show that this method can independently analyze the imaging conditions and path planning according to the satellite attitude maneuvering ability, the orbital parameters and the load angle of view to achieve the maximum width imaging of the target area without blind spots and improve the imaging efficiency and satellite autonomous orbital mission autonomy Planning execution capacity.