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提出利用多层流模型对核安全级数字化仪控系统软件进行建模和可靠性定量评估的方法,开发多层流模型图形化建模和分析平台,建立某数字化仪控系统比例积分微分(PID)控制软件的多层流模型并根据测试结果进行了软件可靠性估计。所提方法通过一次分析可获得软件总目标及所有子目标的可靠度,便于识别软件设计中的薄弱环节,模型容易建立和修改。
A multilevel flow model is proposed to model and evaluate the reliability of the nuclear safety digitalized instrument system. The multi-layer flow model graphical modeling and analysis platform is developed, and a digital instrument control system proportional integral derivative (PID) ) Control software multi-layer flow model and software reliability estimation based on the test results. The proposed method can obtain the overall goal of the software and the reliability of all the sub-targets through one analysis, so as to identify the weak points in the software design and make the model easy to set up and modify.