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卫星正常运行要求星载子网的数据传输管理需具备可靠性、安全性与实时性,能够在规定的时间内完成传输任务,因此需要设计一种合理的数据传输管理方案来满足要求。考虑到1553B总线的数据传输具备速率高、可靠性好和实时性强等优点,选取1553B总线作为星载子网的数据总线,并提出了一种适用的数据传输管理方案。方案合理设计了星载子网的消息结构、消息种类、组网方式、消息传输机制、消息传输流程、消息传输时隙等。最后通过搭建测试平台对传输管理方案进行测试,测试结果表明此方案传输速率高、误码率低、实时性强,可以满足要求。
The normal operation of satellite requires that the data transmission management of satellite-borne sub-networks need to be reliable, secure and real-time, and the transmission tasks can be completed within a specified time. Therefore, a reasonable data transmission management solution needs to be designed to meet the requirements. Considering that the data transmission of 1553B bus has the advantages of high speed, good reliability and strong real-time performance, 1553B bus is selected as the data bus of satellite-borne subnet and a suitable data transmission management scheme is proposed. The program reasonably designed the message structure, message type, networking mode, message transmission mechanism, message transmission process and message transmission time slot of satellite-based subnet. Finally, the transmission management scheme is tested by building a test platform. The test results show that this scheme has high transmission rate, low bit error rate and strong real-time performance, which can meet the requirements.