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Seem to have lost work on component failure modes

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-- the derivation of -- bolocks.
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Robin Clark 2012-03-09 08:55:20 +00:00
parent 8d009de6bd
commit 27f68c8f5b
2 changed files with 6 additions and 5 deletions
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2
TO_DO_LIST.txt
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@ -2,6 +2,6 @@ Write up detailed failure modes essay for R and OPAMP with ref to EN298, FMD-91,
Get thesis template, have emailed Aidian on this.
Start writing up approvals backgrouns to static FMEA.
Start writing up approvals backgrounds to static FMEA.

7
old_thesis/component_failure_modes_definition/component_failure_modes_definition.tex
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@ -160,7 +160,7 @@ Parameter change not considered for EN298 because the resistors are down-rated f
maximum possible voltage exposure -- find refs.
FMD-91 gives the following percentatges for failure rates in
FMD-91 gives the following percentages for failure rates in
\label{downrate}
The parameter change, is usually a failure mode associated with over stressing the component.
In a system designed to typical safety critical constraints (as in EN298)
@ -171,7 +171,7 @@ these environmentally induced failure modes need not be considered.
Literature suggests, latch up, latch down and oscillation.
FMD-91 states, V+ disconnected, V- V+ shorted, NOOP and Low slew.
EN298 does not specifgically include OP_AMPS and these would fall under
EN298 does not specifically define OP\_AMPS failure modes; these would fall under the procedure outlined in
table \cite{en298}[A.1 note e].
This demands that all open connections, and shorts between adjacent pins be considered.
We can examine these failure modes by taking our 358 op-amp and examining
@ -935,7 +935,7 @@ are added to UML diagram in figure \ref{fig:cfg} and represented in figure \ref
\begin{figure}[h]
\centering
\includegraphics[width=400pt,keepaspectratio=true]{../master_uml.jpg}
\includegraphics[width=400pt,keepaspectratio=true]{master_uml.jpg}
% cfg2.jpg: 702x464 pixel, 72dpi, 24.76x16.37 cm, bb=0 0 702 464
\caption{Complete UML diagram}
\label{fig:cfg2}
@ -943,6 +943,7 @@ are added to UML diagram in figure \ref{fig:cfg} and represented in figure \ref
\subsection{Ontological work on FMEA}
Ontological work on FMEA reviewed so far, has concentrated on