基于故障剖面的安全关键系统可靠性测试与评估

摘要

Reliability testing is one of import ways for evaluating the reliability of safety‐critical system .According to the engineering practice in a telecommunication system ,a new reliability testing and evaluation approach is proposed based on the fault profile .The fault probability is extracted from the failure events of the existing safety‐critical system by reverse en‐gineering .The system reliability is evaluated via injecting faults during reliability testing .The approach directly starts from the fault ,without being troubled by missing fault probability data .By the two layered fault model of fault patterns ,our ap‐proach can determine the scope of reliability testing and simplify the evaluation process .%可靠性测试是安全关键系统可靠性评估的重要手段。论文结合在某电信系统的工程实践，介绍一种基于故障剖面的可靠性测试和评估的方法：通过逆向工程从已有的安全关键系统的失效事件中分析提取出故障概率数据，结合故障注入测试对系统的可靠性进行评估。该方法直接从故障入手，不受缺乏缺陷引发故障概率数据问题的困扰，并通过故障模式的双层模型明确测试范围，简化了评估过程。