DAS的T2试验时间优化方法研究

Study on T2 Test Time Optimization Method of DAS

多样性驱动系统(DAS)在进行逻辑功能验证试验(T2试验)时,逻辑链路中定时器的验证往往采用等待的方式,试验过程持续2 h以上,且在等待过程中容易造成人因故障。为减少T2试验验证时间和人因故障,本研究提出了一种基于简单硬件技术的DAS的T2试验时间优化方案,先将定时器从逻辑链路中旁通出去,验证其余部分逻辑功能,再对定时器进行时钟调整并加速。研究结果表明,优化后的DAS的T2试验的总用时可控制在30 min以内。相较于传统等待的试验方式,大大缩短了T2试验时间,并能有效减少试验期间的人因故障,满足核电厂对T2试验响应时间的最新要求。

In the logic function verification test(T2 test)of the Diversity Actuation System(DAS),the verification of the timer in the logical link is often carried out by waiting,making the test last for more than 2 hours,causing human error in the waiting process.In order to reduce T2 test time and human failure,in this study,an optimization method of T2 test time for DAS based on simple hardware technology was proposed.When verifying the logic function,the timers were bypassed,and then the timers were accelerated by adjusting the reference clock of them.The result shows that the total time of T2 test for DAS can be controlled within 30 minutes.Therefore,compared with the traditional test method,the test time is greatly shortened,and the human failure during the test can be effectively avoided,so as to meet the latest requirements of T2 test time in nuclear power plants.