Aiming at the problem that the RTEMS real-time operating system lacks software fault tolerant functions at the system level,this paper presents an entire suite of schemes named two-level fault tolerance in order to improve the reliability of the system.

• 本文针对RTEMS实时操作系统缺乏软件容错支持功能的不足,在操作系统级设计了一套两级软件容错的方案,提高了嵌入式系统的可靠性。