微小卫星星载计算机存储容错技术研究

结合南京航空航天大学小卫星研制课题,针对数据在星载计算机存储器存储的过程中,由于太空中辐射导致的单粒子翻转效应(SEU)使存储数据产生错误的现象,提出了采用纠检错技术对该小卫星存储模块进行设计的方法,与硬件系统相结合,实现小卫星数据存储系统容错。探讨了用VHDL语言实现纠错模块的方法,并最终用FPGA实现。此设计用modelsim进行了仿真测试,效果良好,同时在小卫星模拟仿真运行过程中,运行正常,多次得到了验证。

Research of Fault-Tolerant in RAM of House-Keeping Computer for Small Satellite

Presents the method of memory module to conquer the fault mode in aerospace.An error correction and detection system is designed for the small satellite projected in the Nanjing University of Aeronautics and Astronautics.This system is debugged in VHDL language and it finally comes true through FPGA method.Modelsim SE is used to simulate this method,and it gives out correct emulating waveform.As the whole emulate of the small satellite system runs normally for quite a long time,this project is proved to be effective.