星载嵌入式容错文件系统的设计与实现

Design and Implementation of Satellite-carried Embedded Fault-tolerant File System

星载嵌入式系统中数据的可靠性尤为重要,而空间环境复杂多变,高能粒子易使存储器内容出错,影响星载系统正常运行。针对星载系统中存储器在空间环境中出现的存储数据出错、设备损坏的问题,文中提出了一种基于星载嵌入式文件系统的容错方案。该方案利用嵌入式文件系统的三模冗余和扇区比较容错的方法,分别对数据读取和数据写入时出现的数据出错问题,进行容错处理。经过重复实验验证,该方法可以有效地解决空间环境下星载系统中存储器数据出错的问题,满足大容量、多类型、实时数据长时间远程在轨维护的需求,可以保证星载嵌入式系统数据的可靠性。

Tbe reliability of data in satellite-carried embedded system is important, however, energetic particle will lead to mistake of memory with the complex and volatile space environment. The normal operation of satellite-carried system is impacted. A fault-tolerant scheme based on file system in satellite-carried embedded system is presented in this paper according to the mistake of storage data and damaged equipment appeared in the memory under space environment. The triple module redundancy and the compare fault-tolerant in sectors of embedded file system are utilized in this project. And the fault-tolerant dispose is proceeding respectively to the problem of fault data in the reading and writing. The issue of mistake of storage data in satellite-carried system under the space environment can be solvo：l effectively by using this method via repetitive experiments. And the demand of data which is volume, multi-type and real-time preserved long-distance on orbit can be satisfied,as well as the reliability of data in satellite-carried embedded system.