基于FPGA的立方星可重构星载处理系统研究

Research on Reconfigurable CubeSat on Board Processing System Based on FPGA

摘要:

为了以最小代价提高立方星可重构星载计算机的可靠性,提出了一种基于FPGA的立方星可重构星载处理系统架构。首先,在对国内外微纳卫星星载计算机设计特点进行分析的基础上,分别采用基于SRAM架构和基于Flash架构的FPGA作为核心处理模块与外部表决接口模块,兼顾了系统的运算速度与可靠性。其次,针对可重构星载处理系统中所涉及的可重构策略、在线重构技术以及系统同步技术进行了详细设计。最终,基于所设计硬件系统上进行的测试以及在轨的实测数据验证了该架构的可靠性和有效性。

Abstract:

In order to improve the reliability of CubeSat’s reconfigurable OBC (On Board Computer) with minimum cost, a reconfigurable CubeSat on board processing system with FPGA (Field Programmable Gate Array) is proposed. First, according to the analysis of OBC design character in micro/nano satellite at home and abroad, FPGA based on the SRAM (Static Random Access Memory) architecture and Flash architecture are both adopted as the core process module and external vote interface module, respectively. By doing this, the system operation speed and reliability are both considered simultaneously. Second, the reconfigurable strategy, the online reconfiguration technology and the synchronization technology are discussed in detail. Finally, the tests on the designed hardware system and the operation data in orbit both verify the reliability and effectiveness of the designed architecture.