Abstract: In order to analyze the security risk of the computer interlocking system more accurately and comprehensively, a risk evaluation model for the computer interlocking system is proposed based on the game theory and extenics theory. To achieve a more accurate assessment result, the idea of game theory is used to realize the optimization combination of the subjective weight which is determined by using the G1 method and the objective weight which is determined by using the entropy weight method. Normalizing the classical field matter-element and the evaluating matter-element and using unsymmetrical proximity replacing maximum membership degree principles could effectively solve the problem in the extension method. The analysis results show that the method is suitable for the safety analysis of computer interlocking systems.

Key words: Extension, safety analysis, computer interlocking system, railway signal system

摘要： 为更加准确全面的对计算机联锁系统安全风险进行评价，提出了基于博弈论与可拓学的计算机联锁系统安全风险评价模型，利用博弈论的思想将由G1法得到的主观权重与由熵权法确定的客观权重进行最优化组合从而得到最终权重，避免单独使用主观赋权法或客观赋权法使评价结果偏离实际的出现；将经典域物元与待评物元规格化，运用非对称贴近度代替最大隶属度原则，有效解决了最大隶属度的失效问题。将此模型应用到计算机联锁系统安全风险评价，结果表明该方法有效可行。

关键词: 可拓学, 安全风险评价, 计算机联锁系统, 铁路信号系统