敏捷光学卫星密集区域推扫成像任务规划方法

Push-broom Imaging Scheduling Method of the Optical Agile Satellite in the Dense Regions

敏捷成像卫星可以实现利用三轴姿态机动所形成的推扫成像模式,同时可以在机动过程中同步成像。在敏捷卫星成像任务的基础上,建立考虑推扫成像模式的敏捷卫星任务规划模型。通过高斯投影建立球面直线扫描条带的数学生成模型,并利用Matlab现有函数进行优化解算;由于模型解算的复杂性,将整体规划问题分为两层子问题分别进行处理,在条带任务分配中,设计了适用于计算机计算的含有条带分配策略的解算算法;在上层规划中,基于推扫成像的双向扫描特性,设计了基于启发式规则的敏捷卫星任务规划算法;之后,将不可规划条带拆作孤立点目标进行处理,最后通过再合成处理完成整体规划。仿真结果表明,文章所设计的算法可以有效处理实际情况下的敏捷卫星推扫成像任务规划问题。

The agile satellite could achieve the linescan imaging model with the ability of three-axis-maneuvering , w hile imaging synchronously during the maneuvering . Based on the imaging agile satellite task , the model of the problem of scheduling agile earth observing satellite （AEOS） with the linescan imaging was established . Using the Gauss projection , the preliminary method of the linescan strip was established ,and solved by the existing algorithms in the Matlab . Because of the complexity of the model , the solution strategy of the hierarchical optimization was designed .During the sub-problem , generating the linescan stripe with groups , the solution method can be solved easily . In the upper scheduling problem , according to the two directions of the stripe , the hierarchical optimization based on heuristic rule was designed to solve the problem .Then ,turning the stripes that could not be scheduled into the point target , the whole scheduling was completed with the second-time-scheduling . The simulation shows that the algorithm can solve the actual problem of the scheduling of the linescan imaging agile satellite .