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在轨可更换单元(Orbital Replacement Unit,ORU)体系架构是航天器电子系统能够进行在轨模块内部更换的关键技术之一.传统航天器电子系统硬件模块单元不具备内部可更换性和可扩展性,难以满足航天器自主在轨服务期间单元内部功能改变和功能扩展的需求.提出一种在轨可更换单元体系架构模型.该架构基于多核技术,遵循模块化原则,对航天器电子系统ORU的可更换部分采用具备部分动态可重构(dynamic partial reconfiguration,DPR)的FPGA,将实现功能可变部分的硬件任务配置流作为资源,采用软硬件协同机制来对硬件任务进行替换和维护,为不同的在轨服务需求提供了实用解决方案.该模型可以实现硬件任务的动态管理,使在轨内部模块更换成为可能.
Orbital Replacement Unit (ORU) architecture is one of the key technologies for the spacecraft electronic system to replace the in-orbit module. The traditional spacecraft electronic system hardware module does not have the internal interchangeability and scalability , It is difficult to meet the functional requirements and function expansion of in-orbit unit during the autonomous on-orbit service of spacecraft.This paper proposes a model of in-orbit replaceable unit architecture based on multi-core technology and following the principle of modularization, The replaceable part adopts a FPGA with dynamic partial reconfiguration (DPR) as a resource, and uses the hardware task configuration flow with variable functions as a resource to replace and maintain the hardware task by using a hardware-software collaboration mechanism. In-orbit service needs to provide a practical solution.The model can achieve the dynamic management of hardware tasks, in-orbit module replacement possible.