可扩展的航天器电子系统架构模型

航天器电子系统架构是航天器能够进行在轨模块外部更换的关键技术之一。传统的航天器电子系统架构不具备可扩展性，难以满足航天器在轨服务期间功能模块改变、有效载荷等下位机数量和类型的功能变换和功能扩展的需求。针对这些问题，提出一种可扩展的航天器电子系统架构模型。该架构遵循层次化总线通信原则，通过电子数据表格（electronic data sheet，EDS）和下位机任务桩来对下位机进行动态维护管理，将下位机的电源配置和管理功能从硬件模块层提升到平台软件层实现，为不同的在轨服务需求提供了实用解决方案。该模型可以有效实现不同功能模块和下位机之间的自动集成，使在轨外部模块更换成为可能。

Scalable architecture model for spacecraft’s electronic system

The electronic system of spacecraft is one of the key technologies for on orbit external module replacement. The traditional electronic systems of spacecraft are not scalable and do not meet the demand of function transformations and extensions through changing internal modules or lower systems including payloads. A scalable architecture is proposed for this demand. This architecture follows the design tenet of a hierarchical communication model. Based on electronic data sheet (EDS) and stubs for lower systems, lower systems could be managed dynamically. The power configuration and management for lower systems is provided by system software level instead of hardware module level. A useful solution is provided for different requirements of on orbit servicing. The proposed architecture can achieve an automatic integration between different internal modules and lower systems, making on orbit external module replacement possible.