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Imaging-Duration Embedded Dynamic Scheduling of Earth Observation Satellites for Emergent Events

机译：突发事件对地观测卫星的成像持续时间嵌入式动态调度

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摘要

We present novel two-stage dynamic scheduling of earth observation satellites to provide emergency response by making full use of the duration of the imaging task execution. In the first stage, the multiobjective genetic algorithm NSGA-II is used to produce an optimal satellite imaging schedule schema, which is robust to dynamic adjustment as possible emergent events occur in the future. In the second stage, when certain emergent events do occur, a dynamic adjusting heuristic algorithm (CTM-DAHA) is applied to arrange new tasks into the robust imaging schedule. Different from the existing dynamic scheduling methods, the imaging duration is embedded in the two stages to make full use of current satellite resources. In the stage of robust satellite scheduling, total task execution time is used as a robust indicator to obtain a satellite schedule with less imaging time. In other words, more imaging time is preserved for future emergent events. In the stage of dynamic adjustment, a compact task merging strategy is applied to combine both of existing tasks and emergency tasks into a composite task with least imaging time. Simulated experiments indicate that the proposed method can produce a more robust and effective satellite imaging schedule.
机译：我们提出了新颖的两阶段地球观测卫星动态调度，以通过充分利用成像任务执行的持续时间来提供应急响应。在第一阶段，使用多目标遗传算法NSGA-II生成最佳的卫星成像计划方案，该方案对于将来可能发生的突发事件进行动态调整具有鲁棒性。在第二阶段中，当确实发生某些紧急事件时，将应用动态调整启发式算法（CTM-DAHA）将新任务安排到健壮的成像计划中。与现有的动态调度方法不同，成像持续时间被嵌入两个阶段，以充分利用当前的卫星资源。在稳健的卫星调度阶段，将总任务执行时间用作稳健的指标，以获取具有较少成像时间的卫星调度。换句话说，为将来的紧急事件保留了更多的成像时间。在动态调整阶段，应用紧凑的任务合并策略将现有任务和紧急任务合并为成像时间最少的复合任务。仿真实验表明，该方法可以产生更鲁棒和有效的卫星成像时间表。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第11期|731734.1-731734.31|共31页
  • 作者

    Niu Xiaonan; Tang Hong; Wu Lixin; Deng Run; Zhai Xuejun;

  • 作者单位

    Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Beijing 100875, Peoples R China.;

    Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Beijing 100875, Peoples R China.;

    China Univ Min & Technol, Sch Environm Sci & Spatial Informat, Xuzhou 221116, Peoples R China.;

    Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Beijing 100875, Peoples R China.;

    Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Beijing 100875, Peoples R China.;

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