中国空间科学技术

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微小卫星数据存储器单粒子作用的检测及纠错

熊剑平,贾惠波,尤政   

  1. 清华大学宇航中心!北京100084,清华大学宇航中心!北京100084,清华大学宇航中心!北京100084
  • 发布日期:2000-12-25

Detection and Correction of SEU in the Data-Handling System of Micro-Satellite

Xiong Jianping Jia Huibo You Zheng (Tsinghua University,Beijing 100084)   

  • Online:2000-12-25

摘要: 因为辐射导致的单粒子翻转效应 (SEU) ,使得微小卫星星上存储器在太空运行时其内容可能出现小概率错误 ,这种错误会影响计算机系统的运行和关键数据。文章阐述了“清华一号”微小卫星数据处理系统对 SEU的纠错方法 ,分别介绍了实现 (12 ,8)和 (39,32 )的汉明码纠错设计和基于 FPGA的三模块冗余纠错编码方法 ,并分析了这些方法的工作原理和过程

关键词: 单粒子效应, 存储器, 纠错, 方法, 小型卫星

Abstract: Because of radiation in space environment,micro-satellite will normally experience Single Event Upset (SEU) errors in its Random Access Memory at a scale of small probability.These errors affect key data storage and the functions of on-board computer or data handling system.The error correction methods used in Tsinghua l micro-satellite are described and the details of design which implements (12,8) and (39,32) Hamming coding and Triple-Module-Redundancy coding based on FPGA are given.