# 星載計(jì)算機(jī)和數(shù)據(jù)處理
## 星上存儲(chǔ)
### 空間系統(tǒng)中的大容量存儲(chǔ)
（Mass memories in space systems are evolving from simple stream tape-like recorders to complex intelligent (sub)systems capable of autonomous operations.） 空間系統(tǒng)中的大容量存儲(chǔ)從簡(jiǎn)單的流式磁帶存儲(chǔ)向復(fù)雜的具備自治操作能力的智能子系統(tǒng)發(fā)展，（This evolution is both driven by requests coming from complex multi-payload missions and from the availability of very high density memory components.）復(fù)雜的多重有效載荷任務(wù)的需求和對(duì)超高密度記憶組件的可用性的要求推動(dòng)了它的發(fā)展。
（NAND ?ash memories are gaining acceptance as data storage in consumer electronics (e.g., USB ?ash drives) because of their compactness, low power, low cost and high data throughput.）家用電子產(chǎn)品越來(lái)越愿意選擇NAND閃存記憶體來(lái)存儲(chǔ)數(shù)據(jù)（比如U盤）， 因?yàn)樗麄冃∏桑?jié)能，廉價(jià)，快速，However, （hi-rel electronics is struggling in keeping the pace with the aggressive （scaling down）縮減 of NAND ?ash technology. ）高可靠性電子產(chǎn)業(yè)無(wú)法像民用產(chǎn)業(yè)一樣飛速得把nand閃存的體積做的那么小，而且越做越小（As a consequence, the use of NAND ?ash in space applications is not as established as in the consumer market and is still under research. ）所以nand閃存在空間應(yīng)用中使用得不像家電行業(yè)中那么那么廣泛。
Furthermore, the availability of fully quali?ed space memories is not an option for cost, availability, long lead or performance reasons. 出于成本和性能的長(zhǎng)遠(yuǎn)考慮，使用空間記憶體也不是一個(gè)合理的選擇。（Commercial Off The Shelves (COTS，一種集成通信技術(shù)) NAND ?ashes need to be adopted.）空間存儲(chǔ)產(chǎn)業(yè)必須接受cots nand閃存。（ 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).）既然大多數(shù)cots nand都經(jīng)不過(guò)宇宙的考驗(yàn)，研究人員必須要用新方法設(shè)計(jì)他們，并進(jìn)行額外的測(cè)試，比如升級(jí)篩選和冗余測(cè)試。
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。為了讓記憶體適應(yīng)宇宙環(huán)境，研究人員設(shè)計(jì)了大量容錯(cuò)設(shè)計(jì)方法，這個(gè)部門的主要任務(wù)就是提供有實(shí)用價(jià)值的效果對(duì)照和折衷方案和設(shè)計(jì)方針。
