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Safety system logic solver availability, 1oo2D and TMR

机译:安全系统逻辑求解器的可用性,1oo2D和TMR

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摘要

Four simplifications in the calculation of safety instrumented system logic solver performancemeasures (mean time to failure and risk reduction factor) clarify the dependence on the variousfactors involved. These include failure rate, fail safe fraction, diagnostics coverage and commoncause. Approximate MTTF and RRF formulas are developed for 1oo2D and TMR logic solvers.These provide an explicit indication of which factors have the greatest influence on improving safety.
机译:安全仪表系统逻辑求解器性能度量的计算中的四个简化(平均故障时间和降低风险的因素)阐明了对各种因素的依赖。其中包括故障率,故障安全分数,诊断范围和常见原因。针对1oo2D和TMR逻辑求解器开发了近似的MTTF和RRF公式,这些公式明确表明了哪些因素对提高安全性影响最大。

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