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目前,大部分航天器都采用了基于CCSDS协议体系的分包遥测体制,具有较好的灵活性及较高的信道利用率。但是,传统的分包遥测体制大多只利用了协议体系中的包多路复用机制,在某些应用场景下,对下行遥测数据流的控制能力显得不足。提出了一种充分利用CCSDSAOS协议信道两级复用机制的遥测数据同步调度算法,在包调度层面进行分系统遥测帧速率控制,在虚拟信道层面进行系统遥测速率控制。相比传统的分包遥测体制,本算法具有更强的灵活性。通过仿真验证了算法的可行性。
At present, most of the spacecraft are based on the CCSDS protocol sub-system remote sensing system with good flexibility and high channel utilization. However, the traditional sub-packet telemetry system mostly uses the packet multiplexing mechanism in the protocol system. In some application scenarios, the capability of controlling the downlink telemetry data flow is insufficient. A synchronization algorithm of telemetry data, which makes full use of CCSDSAOS channel two-stage multiplexing mechanism, is put forward. At the packet scheduling level, the remote sensing frame rate control is implemented and the system telemetry rate control is implemented at the virtual channel level. Compared with the traditional sub-packet telemetry system, the algorithm has more flexibility. The feasibility of the algorithm is verified by simulation.