摘要
在现代的电子业、制造业和工业控制等系统中,系统的可靠性越来越重要,而嵌入式实时控制系统(Embedded Real-time Control System,ERCS)大部分是控制系统的核心部分,其系统可靠性尤为重要。首先对嵌入式实时控制系统软硬件进行形式化抽象定义;然后对不可再分的软件模块和IP硬核进行可靠性建模,应用Copula函数对软件子系统和硬件子系统分别进行建模,并建立了ERCS系统的软硬件综合可靠性Copula模型;最后应用建立的模型,对具体的系统进行了软硬件综合可靠性计算。通过实例计算可知,用Copula建立的ERCS软硬件综合可靠性模型考虑了软件各个模块间、硬件各个IP硬核间和软硬件间的相依性,使得ERCS软硬件综合可靠性比独立时有所提高。
The reliability of a system employs an increasing important issue in modem day electronic,manufacturing and industrial systems,and most of the control systems are the core part of Embedded Real-time Control System（ERCS）,and the system reliability is especially important.At first,formalization of the hardware/software of ERCS was defined.Then,reliability modeling was given for software modules which can not be subdivided and for IP hardcore.The reliabi lity modeling of hardware/software of ERCS was also provided by applying Copula function.The integrated reliability modeling of software and hardware of ERCS was also established by applying Copula function.The reliability of specific system hardware/software was calculated by using the model.The results show that the reliability model established with Copula function takes account of the correlation between software modules,IP hardcore and hardware/software,therefore the integrated reliability of hardware/software of ERCS is improved compared with the independent hardware and software.
出处
《计算机科学》
CSCD
北大核心
2014年第4期145-149,共5页
Computer Science
基金
四川省教育厅自然科学重点项目:嵌入式实时控制系统可靠性保障技术及策略研究(10ZA008)资助
