星载高可靠性嵌入式数据库系统的设计与实现

Design and Implementation of a Highly Reliable On-board Embedded Database System

随着国内航天技术的不断发展,星载平台数据量日渐增多,为了提高星载嵌入式系统对数据的处理能力,在充分考虑现有嵌入式数据库功能的基础上,结合星载嵌入式处理器硬件资源受限的实际情况,提出了一种新型的基于FatFs文件系统的星载嵌入式数据库实现方案,大大减少了对系统内存的占用。同时,该方案将应用于通讯领域的汉明码容错技术加以改进并与数据库系统相结合,有效解决了空间环境下星载数据管理系统中极易出现的单粒子事件。经过测试验证表明该方案正确可行,且与传统的嵌入式数据库相比,可以满足星载数据库系统对于高可靠性的要求,弥补了传统数据库系统在数据存储可靠性设计上的不足。

With the continuous development of domestic space technology,the amount of data on the satellite platform is increasing.In order to improve the data processing capability of the on-board embedded system,on the basis of fully considering the existing embedded database functionality,combined with the actual situation of limited hardware resources,we put forward a new implementation of the on-board embedded database based on FatFs file system to greatly reduce the system memory usage.At the same time,the program improves Hamming code fault-tolerant technology applied in the field of communication and combines it with the database system to effectively solve the single particle event easily appeared in the space borne data management system.The test proves that the scheme,which is correct and feasible,compared with the traditional embedded database,can meet the high reliability requirements of the on-board database system,and make up for the shortcomings of the traditional database system in the reliability design of data storage.