一种航天器上多子网数据网络设计

Design of On-board Multi-subnet Data Network of Spacecraft

基于1553B总线归纳了对等子网和上下级子网2种子网间的连接方式,并结合网络连接关系、数据传输机制,提出多子网的数据网络设计思想。该设计既能保证子网的独立性,又能将子网连接为一体,既可解决突发数据的传输问题,又能适用于复杂多子网网络的航天器。以某具体航天器为例,完成包含对等子网和上下级子网的多子网网络数据系统设计,并验证了其可行性。文章提出的设计已应用到航天器工程中,降低了多子网航天器协议设计的难度。

Based on 1553B serial data bus,two link modes of multi-subnets which are peer-to-peer subnet and superior/subordinate subnet are concluded. And a design of multi-subnet is discussed combining with the network link relationship and data transmission mechanism. It can realize the independence of a subnet, and connect multi-subnets together. The problem of transmission of burst data is solved, so the design can be used in a spacecraft including a complex multi-subnet data network. An example of data system design for an actual spacecraft is described which includes a peer-to-peer subnet and a superior/subordinate subnet,and the result shows that this design is feasible. The design proposed has been applied to the spacecraft and can simplify the protocol design of the multi-subnet spacecraft.