应用SpaceWire网络的智能处理通用平台设计

针对大规模星座的智能处理通用平台高速数据交互的需求,设计应用SpaceWire网络实现外部载荷设备、智能处理通用平台及内部各模块间的互联互通;采用标准物理接口、SpaceWire路由逻辑寻址方式、标准CCSDS协议和RMAP协议,使得用户未知网络连接细节即可实现即插即用;当冷备份的模块故障时可以通过切机操作对系统重构,设计SpaceWire网络自主寻址机制重新规划传输路径;同时对SpaceWire网络应用设计进行硬件防静电、软件状态监测等可靠性设计;与无网络连接的同类型系统进行比较,该设计优势明显,接口种类少、协议标准、支持应用重构且支持系统扩展;设计测试用例对数据传输速率、切机后自主寻址以及应用重构等功能进行验证,测试结果表明功能都满足要求;该设计在大规模卫星设计中具有很好的应用前景.

Design of using SpaceWire in standard intelligent data process unit

For the requirement of high-speed data exchange in intelligent data process unit of large-scale constellations, the design of using SpaceWire network to combine both the payloads and inner modules of intelligent data process unit together is presented. The system connecting standard SpaceWire interface, routing with logic address, using CCSDS protocol and RMAP protocol makes it easy to integrate new instrument into the network without knowing the details of the network. When any module with redundant part is blocked, the module can be transferred from nominal part to redundant part without any functional missed. Meanwhile, SpaceWire router can work out new route to the new destination automatically. Reliable methods are also considered in SpaceWire hardware and software design. When comparing with system without using SpaceWire network, there are obvious advantages such as less interface types, standard protocols, recoverable and supporting system elastic. In the test part, the data rate test, bit error rate test, auto redundant route test and route table reconfiguration test are carried out, the testing results shows that it performs great, and has good prospects for large-scale constellations application.