Machine History Viewer For The Integrated Computer Control System Of The National Ignition Facility* Page: 4 of 6
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USE CASES
The Machine History Viewing Tools are used
system operators, scientists, engineers and technici
System operators gain situational awareness f
recent history (e.g., temperature or position pk
Scientists can improve system alignment accuracy
identifying interferences such as heat from champ
illumination sources. Engineers and technicians
troubleshoot system problems and design efficie
improvements for future upgrades. Engineers can
observe trends in system behavior which will all
repairs or service to be performed before a syst
failure occurs (Figure 3).Nir
Lower SXI Posltioner Max Motor Current
Change in peak current I
Twelve Month Historyby
ans.
rom
)ts).
by
ber
can
ncy
alsocontain both numeric and text values. Users can also
export the table data to an Excel file. The export
contains an initial sheet of the combined data, and then
individual sheets for each timeline. The combined
sheet usually contains many blank cells, since it's time-
correlated and not all devices archive history at the
same time. The individual sheets don't have gaps,
which simplifies their use in Excel for plotting or
sorting.ow MULTIPLE VERTICAL SCALE
em A problem in simple strip chart displays is that if
multiple timelines are shown on the same chart, the
timeline with the greatest range of values dominates the
--' scale. For example, if the chart shows a motor with a
jewer range 0 to 7000 mm, and the same chart shows a brake
(on/off) with a range of 0 to 1, the brake will appear as
a straight line, because the vertical scale will be 0 to
7000. The Viewer solves this problem by supporting
multiple vertical scales. Now the chart can have two
scales, one for the motor and one for the brake, and the
changes to each will be clear (Figure 3). The Viewer is
flexible in that any timeline can be assigned to any
scale. So if there are multiple devices sharing a similar
range of values, they can be plotted against a shared
scale. Scales can be depicted on the left, or right, or
both sides of the chart.Suggests an adverse changein the msertlon mechanism-
maintenanceteamshouldinspectthe hardware
Figure 3 - Chart showing maximum motor current per
move, for one year, for the Lower Static X-ray Imager
insertion motor.
USER PRESENTATION
Strip Chart: The Machine History Viewer uses a strip
chart display as its primary presentation. This is a
standard view for time-based data, and is particularly
useful when correlating different device behavior over
the same period. The chart view allows multiple
timelines on the same display. It also allows live
updating with horizontal scrolling (much line an analog
strip chart device). The strip chart allows zooming,
panning, and auto-scaling, all with mouse movements.
Clicking the legend for specific timelines will hide or
show that timeline on the chart. Hovering over any
data point will show a tooltip with the date/time and
value for the point.
Table View: Also available is a table-view, showing the
timeline values in an Excel-like grid. The table view is
better for seeing specific data values, or series of
values. The table can be sorted on any column and canNt! Maldine H istry ViEwEr
- ~UL" 11:
Figure 3 - Chart with multiple Y-scale. In this chart,
we see a motor's position, velocity, and the position
of the parking brake. The motor range is 7000 mm,
the velocity 150 and the brake zero to one. In the
Machine History Viewer, the user has full control
over all scales, labels and colors on the chart.Machine History Viw
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Wilson, R; Hoffman, J & Mauvais, J. Machine History Viewer For The Integrated Computer Control System Of The National Ignition Facility*, article, October 2, 2013; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc867448/m1/4/: accessed March 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.