基于Nand Flash的星载综合数据固态记录系统

在星载平台资源受限条件下，采用以FPGA+CPU为控制核心、Nand Flash为固态存储阵列的系统架构，实现了高速、大容量、高可靠的数据记录。针对传统双Plane操作与并行扩展对存储速度提升有限、芯片使用较多的问题，采用4级流水线方式控制Flash阵列。为解决标准传输协议传输效率低的问题，设计了一种自定义高速串行传输协议。为减缓空间辐射环境对存储数据的影响，采用了三模冗余、配置回读与部分重构等容错机制。对所提出系统进行的实验验证结果表明，该星载记录系统存储容量达36 Tbit，记录与回放速度分别达到16 Gbit/s与8 Gbit/s，传输误码率为10-12，传输包效率为96.7%，可作为通用存储系统以满足航天应用需求。

A comprehensive data solid state recorder based on Nand Flash memory for spacecrafts

In order to realize the high-speed,large capacity,high reliability data recording system under the condition of the limited resources of satellite platform,the FPGA+CPU is chosen as the core control unit,and the system uses the Nand Flash as solid state memory chips. To address the problem that the traditional dual plane operation and parallel expansion have limited storage speed and more chips,the 4-stage pipeline is introduced to control the Flash array. To solve the low data transmission efficiency of standard transmission protocol,a user-defined high-speed serial transmission protocol is designed. To reduce the influence of the space environment on the data storage,such tolorance mechanisms as triple modular redundancy(TMR),configuration read back and partial reconstruction are introduced. Test of a prototype demonstrates that the storage capacity is up to 36 Tbit,recording and playback speeds reach 16 Gbit/s and 8 Gbit/s,respectively,and the error rate is 10-12,the transmission packet efficiency is 96.7%. This comprehensive data solid state recorder can be adopted as a universal storage system to meet the demand for aerospace applications.