Abstract:

The utilization of pre-set command sequences based on static constraints results in utility degradation for traditional Earth-observation-satellite mission management scheme. To solve this problem, a dynamic-constraint-orientated adaptive mission management scheme based on the directed graph model is proposed in this paper. Dynamic constraint parameters are calculated by using the ground simulation combined with real-time telemetry data from on-board circuit. Based on these constraints and user-orientated mission control interfaces between the space segment and the ground segment, the command sequences are dynamically generated by the on-board computer. The simulation result for an Earth-observation-satellite shows that compared with the conventional scheme, user-orientated control interface complexity can be reduced by 88.5%, effective command uplink rate can be improved by 699%, effective payload data transmission rate can be improved by 10%, global data acquisition capability can be improved by 11%, and real-time data acquisition capability can be improved by 100% in China. The proposed dynamic constraint-orientated adaptive mission management scheme has great potential in Earth-observation-satellite on-orbit operation.

Key words: Directed graph model, User-orientated mission control, On-board command scheduling, Dynamic constraint, Utility improvement