敏捷成像卫星自主规划模型与算法

Model and algorithm of automatic planning for agile imaging satellite

针对敏捷成像卫星自主规划问题,将规划、决策、执行和信息反馈相结合,提出星上自主规划框架,并介绍框架结构和模块功能。在分析主要约束条件的基础上,建立基于时间线约束网络的问题模型。通过将各种卫星动作前后衔接,组合成能够完成不同任务的动作序列,提出一种面向卫星动作序列的启发式算法。该算法分为规划和决策两个部分,并在卫星执行每一个动作序列的同时基于多种启发式规则进行规划,在动作序列执行结束时进行决策。实验结果表明了自主规划框架和模型的合理性以及算法的有效性。

Aiming at the problem of automatic planning for agile imaging satellite, the architecture of automatic planning combined with planning, decision making and information feedback was presented. The architecture, components and functions of automatic planning were introduced. The model based on constraint network on timelines was constructed according to the satellite physical constrains and operational constrains. The activity sequences were constructed through connecting various activities. And a heuristic algorithm based on activity sequences was presented. The algorithm was composed of two parts： planning and decision making. The algorithm could plan based on heuristic rules when satellite was performing every activity sequence, and make decision when the activity sequence was completed. Finally, satisfactory results are obtained through experiments, which show that the architecture of automatic planning and the model are reasonable, and the algorithm is efficient.