摘要
为了提高系统的性能和可靠性,文中描述了计算机控制系统的两种容错方案:系统级三模冗余(TMR)方案和部件级三模冗余(TTMR)方案,给出了两种容错系统的马尔可夫模型,并利用MATLAB工具对描述可靠性的重要参数指标———可靠度进行了比较和分析。得出部件级容错计算机系统的可靠度受故障覆盖率C的影响比系统级容错计算机系统的小,在C相同的情况下,部件级容错计算机系统的可靠度比系统级容错计算机系统的可靠度高,因此部件级容错计算机系统比较易于实现。
In order to improve performance and reliability of a system, the paper describes two fault-tolerant schemes of computer eontrol system that are TMR of system level （TMR） and of part level（TTMR）. At the same time it depicts Markov model of the two fault-tolerant systems, and compares and analyzes the important parameter of system＇s quality-reliability with MATLAB. And get the conclusion that the effect of fault coveting rate （C） on TTMR is smaller than that on TMR, and at the same C, the reliability of TTMR is higher than that of TMR. So the computer system of TTMR is implemented easily.
出处
《微机发展》
2005年第11期77-79,共3页
Microcomputer Development
关键词
容错技术
可靠度
失效率
马尔可夫模型
technology of fault-tolerance
reliability
failure rate
Markov model
