大规模卫星星群域管控策略设计

Domain control strategy for the large-scale satellite cluster

针对大规模卫星星群单节点管控带来的系统通联性差、地面资源依赖度高等问题,提出了分层管理、域内自治、动态维护的卫星星群分布式域管控策略。首先,设计了衡量卫星节点管控能力的静态指数及动态指数,并提出了多因素加权的星群簇首选择方法。其次,提出了通过逐层择优的方式进行域结构初始化的算法流程。最后,根据星群变化情形,提出了基于事件触发的动态时间片域管控方法,保证了大规模星群在全任务周期内能维持相对稳定的管控构型。仿真结果表明,所提出的域管控策略能够有效完成对目标星群的簇首选择、域初始化及动态维护过程,并保持域结构的稳定。实现了目标星群在空间中的域结构划分管理,使地面直接参与管理的卫星节点数目降至原管理模式的14%,有效解决了星群管控严重依赖地面资源的相关问题。

In large-scale satellite constellations,single node management and control will lead to poor system connectivity and high dependence on ground resources.A distributed domain control strategy for satellite constellations with hierarchical management,intradomain autonomy and dynamic maintenance was proposed.Firstly,both the static index and dynamic index to measure the governability were defined.According to the newly-defined indexes,a multi-factor weighted cluster head selection method was proposed.Then,based on the selected cluster head node,a cascading optimal initialization algorithm of the cluster was established.Aiming at dynamic maintaining of the established cluster control structure,an event-triggered dynamic time slice domain control method was proposed.Finally,control simulation result of the proposed method in the case of LEO large-scale satellite constellation verifies the effectiveness of cluster head selection,cluster initialization and long-time maintaining.The number of satellites which were managed through ground station was reduced to 14%.High dependence on ground resources was resolved.