摘要
空间太阳望远镜(SST)是一颗对太阳进行观测的科学卫星,它使用FPGA芯片对每天采集的大量数据进行预处理.高昂的建造费用和恶劣的工作环境,确保SST数据的高可靠性成为一项艰巨任务.改进了常规TMR结构,提出一种基于配置数据的可重构硬件故障检测和修复方法,使用JBits工具简化对配置数据的各种操作.此结构和方法能及时检测到故障,通过硬件重构消除故障,提高系统可靠性.采用Markov过程理论对系统可靠性进行分析,结果表明可靠性可得到显著提高.
space solar telescope （SST） is a scientific satellite that employs FPGA （field programmable gate array） to preprocess the huge data gathered by its sensors. Since its high building and maintaining cost and poor working environment, it＇s a great challenge to ensure the reliability. An improved TMR （triple module redundancy） architecture is presented, in which the data arbiter can find the difference among its three inputs and send an error message to the main controller to launch fault scanning operation. A new method for the main controller is proposed to detect and remove hardware faults based on the configuration data of reconfigurable system. The test circuits and test stimulus are constructed by generating different patterns of configuration data. Since the reconfiguration process and the structure of configuration data are very complex, JBits is used to simplify the process of configuration data, which is originally written to facilitate reconfiguration system development. These measures are able to detect faults when they appear and remove faults by hardware reconfiguration, thus taking full advantage of TMR and reconfigurable features to improve reliability. And experiment results are given to show that minor routing resource fault can be repaired by using JBits and JRoutes. The availability of reconfigurable system with the proposed new architecture and fault processing method is modeled and analyzed using Markov process theory. Analysis results show that the reliability is improved greatly.
出处
《计算机研究与发展》
EI
CSCD
北大核心
2007年第4期722-728,共7页
Journal of Computer Research and Development
基金
国家"八六三"高技术研究发展计划基金项目(863-2.5.1.25)
