CAJ | 학술논문

传统二乘二取二结构采用双系热备的方式切换2个子系统，系统可用性不高且容易造成数据丢失。为此，提出一种应用于安全计算机系统的新型冗余结构--四重化并行表决结构。该结构的2个子系统采用并行表决的工作方式，当单个子系统发生未检测到的故障时，可降低其对系统产生的影响。利用马尔可夫模型研究该结构的安全性，并通过Matlab仿真数据与三模冗余、二乘二取二和双机热备结构进行对比。结果表明，该结构的可靠度高于其他3种结构，安全度高于三模冗余和双机热备结构。此外，可维修特性也能提高系统的可靠度。
전통이승이취이결구채용쌍계열비적방식절환2개자계통，계통가용성불고차용역조성수거주실。위차，제출일충응용우안전계산궤계통적신형용여결구--사중화병행표결결구。해결구적2개자계통채용병행표결적공작방식，당단개자계통발생미검측도적고장시，가강저기대계통산생적영향。이용마이가부모형연구해결구적안전성，병통과Matlab방진수거여삼모용여、이승이취이화쌍궤열비결구진행대비。결과표명，해결구적가고도고우기타3충결구，안전도고우삼모용여화쌍궤열비결구。차외，가유수특성야능제고계통적가고도。
The traditional double two out of two redundancy structure switches by hot standby mode between two subsystems, the availability of the system is not high and the data loss will possibly happen. Aiming at this problem, a new redundancy structure for safety computer, quadruple modular parallel voting structure, is proposed in this paper. The working mode of parallel voting reduces the effect of the undetected failure in a single subsystem. The safety of the structure is analyzed with Markov model. Tripe module redundancy structure, double two out of two redundancy structure and dual hot-standby structure are compared by the data of Matlab simulation. The result shows that the reliability of quadruple modular parallel voting structure is better than the other three structures, and the safety is higher than tripe module redundancy and dual hot-standby structure. Moreover, the characteristic of maintenance can improve the system reliability.