Abstract:

SpaceWire bus is nowadays mainly used in the way that a few nodes are connected to a central router, forming a small star topology. Research on SpaceWire network with large number of nodes in complicated satellite is rare yet. A bus type topology of SpaceWire network was proposed concerning the high reliability demand of spacecraft. Operation principle and hierarchical fault-tolerant scheme of this network were analyzed, reliability and communication performance were also derived. The results indicate that the network topology satisfies requirements of spacecraft application. Design rules of packet length, link data rate and nodes layout in SpaceWire network were provided to support planning on-board SpaceWire network.