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计算机工程

• 安全技术 • 上一篇    下一篇

四重化并行表决结构及其安全性分析

张 楠1,2,黄文君1,2,何伟挺2   

  1. (1. 工业控制技术国家重点实验室,杭州 310027;2. 浙江大学智能系统与控制研究所,杭州 310027)
  • 收稿日期:2012-08-17 出版日期:2013-10-15 发布日期:2013-10-14
  • 作者简介:张 楠(1988-),男,硕士研究生,主研方向:安全系统,嵌入式技术;黄文君,研究员;何伟挺,博士研究生

Quadruple Modular Parallel Voting Structure and Its Safety Analysis

ZHANG Nan  1,2, HUANG Wen-jun  1,2, HE Wei-ting  2   

  1. (1. State Key Laboratory of Industrial Control Technology, Hangzhou 310027, China; 2. Institute of Cyber-Systems and Control, Zhejiang University, Hangzhou 310027, China)
  • Received:2012-08-17 Online:2013-10-15 Published:2013-10-14

摘要: 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。

关键词: 安全计算机, 四重化, 并行表决, 可靠性, 安全性

Abstract: 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.

Key words: safety computer, quadruple modular, parallel voting, reliability, safety

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