面向星下点轨迹自主维持的星载软件 算法与实现

为实现单星星下点轨迹维持和保持编队卫星间构型关系，提供了星载软件解决方案.给出了卫星漂移模型，并研究了轨控实施策略、轨迹实时匹配等关键技术.依托星务硬件平台，通过软件实现了样本信息处理、控制策略决断、状态自主设置、轨控参数计算等控制过程.以轨道仿真数据为输入，对软件输出与理论结果进行了比较，验证了轨控软件实现的可行性、正确性.自主轨道维持技术将进一步提升卫星的智能化、自动化水平.

Onboard Software Algorithm and Implementation for Autonomy Orbit Maintenance with Ground Track

This paper provides an onboard software solution for maintaining satellite orbit with sub satellite point track and keeping formation of constellation. These key technologies about the model of sub satellite point track drifting, strategy of orbit controlling and method to real time match track are researched. Based on on board housekeeping platform, the procedures about processing of exemplars, deciding of orbit control, self setting of state, and computing of orbit control parameters are implemented by software. With simulated orbit data as input, the software output and theory results are compared. The feasibility and correctness of software are verified. The smart and automatic level of satellites will be promoted further by the technology of autonomy orbit maintenance.