空间DSP信息处理系统存储器SEU加固技术研究

当前以高性能DSP为核心的信息处理系统被广泛应用于空间飞行器电子系统中.DSP系统为实现大数据量信息处理,通常需要扩展其外部存储器.而存储器件在空间应用中容易发生单粒子翻转(SEU:Single Event Upset),使得存储器件中数据发生改变,从而导致系统计算结果错误,甚至可能导致系统功能失效.在介绍信息处理系统存储器件SEU机理的基础上,针对DSP信息处理系统存储器的结构特点,提出了一种基于"反熔丝型PROM+TMR加固设计FLASH+EDAC加固设计SRAM"结构的存储器SEU加固设计方案,并进行了原型实现.实验分析表明该设计具有较好的抗SEU性能和较强的实时性,可以为同类型的空间信息处理系统设计提供参考.

Research on Memory's SEU Mitigation Technology in DSP-based Space Information Processing System

The space information processing system based on high performance DSP is widely used in the space aircraft electronic equipment.In order to accomplish mass data information processing, many type memories are used in the processing system based on DSP. In the space environment, the memories are more sensitive to SEU (Single Event Upset) The SEU can affect the validity of calculation or even cause a failure of the information processing system. The SEU mechanisms of memories are introduced firstly According to the structure of the space information processing system based on DSP, A SEU mitigation scheme based on "PROM+TMR hardened FLASH+ EDAC hardened SRAM"is presented for hardening the memories in space aircraft information processing system The design has special realtime performance and high reliability and has been applied in a spaceborne integrated processor platform, which works well in the experiments It can provide important references for the others space information processing system.