From c91f974d891d67ffb70b196dfad88c4bee3c4867 Mon Sep 17 00:00:00 2001 From: Robin Clark Date: Sun, 18 Sep 2011 11:16:14 +0100 Subject: [PATCH] state exposion estimation --- fmmd_concept/System_safety_2011/state_exp.tex | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fmmd_concept/System_safety_2011/state_exp.tex b/fmmd_concept/System_safety_2011/state_exp.tex index a5b6200..8d54b14 100644 --- a/fmmd_concept/System_safety_2011/state_exp.tex +++ b/fmmd_concept/System_safety_2011/state_exp.tex @@ -112,7 +112,7 @@ $$ %\end{equation} $$ -Thud for FMMD we needed to examine 720 failure mode scenarios, and for traditional FMEA +Thus for FMMD we needed to examine 720 failure mode scenarios, and for traditional FMEA type analysis methods 19440. % In practical example followed through, no more than 9 components have ever been required for a functional % group and the largest known number of failure modes has been 6. @@ -123,7 +123,7 @@ type analysis methods 19440. \clearpage Note that for double simultaneous failures the equation~\ref{eqn:fmea_state_exp} becomes equation~\ref{eqn:fmea_state_exp2} essentially making the order $N^3$. -The FMMD case is cubic within the functional groups only, not all the components in the system. +The FMMD case (equation~\ref{eqn:anscen2}), is cubic within the functional groups only, not all the components in the system. \begin{equation} @@ -132,6 +132,10 @@ The FMMD case is cubic within the functional groups only, not all the components %(N^2 - N).cfm \end{equation} +\begin{equation} + \label{eqn:anscen2} + \sum_{n=0}^{L} {fgn}^{n}.fgn.cfm.(fgn-1).(fgn-2) +\end{equation} \end{document}