星载计算机和数据处理

# 星载计算机和数据处理

## 星上存储

### 空间系统中的大容量存储

(Mass memories in space systems are evolving from simple stream tape-like recorders to complex intelligent (sub)systems capable of autonomous operations.) 空间系统中的大容量存储从简单的流式磁带存储向复杂的具备自治操作能力的智能子系统发展,(This evolution is both driven by requests coming from complex multi-payload missions and from the availability of very high density memory components.)复杂的多重有效载荷任务的需求和对超高密度记忆组件的可用性的要求推动了它的发展。

(NAND flash memories are gaining acceptance as data storage in consumer electronics (e.g., USB flash drives) because of their compactness, low power, low cost and high data throughput.)家用电子产品越来越愿意选择NAND闪存记忆体来存储数据(比如U盘), 因为他们小巧,节能,廉价,快速,However, (hi-rel electronics is struggling in keeping the pace with the aggressive (scaling down)缩减 of NAND flash technology. )高可靠性电子产业无法像民用产业一样飞速得把nand闪存的体积做的那么小,而且越做越小(As a consequence, the use of NAND flash in space applications is not as established as in the consumer market and is still under research. )所以nand闪存在空间应用中使用得不像家电行业中那么那么广泛。

Furthermore, the availability of fully qualified space memories is not an option for cost, availability, long lead or performance reasons. 出于成本和性能的长远考虑,使用空间记忆体也不是一个合理的选择。(Commercial Off The Shelves (COTS,一种集成通信技术) NAND flashes need to be adopted.)空间存储产业必须接受cots nand闪存。( Since most of them are not able to successfully operate and survive in the space environment, they request additional tests and design methods (e.g., up screening, redundancy).)既然大多数cots nand都经不过宇宙的考验,研究人员必须要用新方法设计他们,并进行额外的测试,比如升级筛选和冗余测试。

One of the section's main R&D activity area is targeted towards providing practical valuable design guidelines, comparisons and tradeoffs among the huge number of dimensions of fault tolerant design methodologies applied to the critical space environment。为了让记忆体适应宇宙环境,研究人员设计了大量容错设计方法,这个部门的主要任务就是提供有实用价值的效果对照和折衷方案和设计方针。

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