| May I use z parameter for notch as engine tractiveEffort? [message #1317] |
Thu, 02 October 2014 09:40  |
yutaka.manchu
Messages: 11
Registered: September 2014
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Junior Member |
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Dear All,
Some engines have an acceleration/power control lever with several
notches.
Each notch limits the acceleration/power level of the engine.
To express this notion, I'd like to confirm the correctness to use z
parameter of valueTable written in
" http://wiki.railml.org/index.php?title=RS:valueTable_tractiv eEffort", as
"'z' is the additional parameter extending the dependency to y = f(x,z)"
and "In case of several curves versus the x-coordinate there is the child
element <columnHeader>, which takes the values of the z-coordinate as
parameter for the array of curves.".
According to "http://wiki.railml.org/index.php?title=RS:columnHeader", it
could be expressed as followings;
<vehicle id="ve_6000-Mc1" name="6000-Mc1" length="9.0" speed="60.0"
bruttoWeight="3145.8" bruttoAdhesionWeight="393.2">
<engine>
<propulsion id="peMotor" powerType="electric" power="1105000"
rotationMassFactor="1.0" description="Motor">
<tractiveEffort>
<valueTable xValueName="Speed" xValueUnit="km/h"
yValueName="Tractive Effort" yValueUnit="N" zValueName="Notch"
zValueUnit="1">
<columnHeader zValue="1">
</columnHeader>
<valueLine xValue="0.0">
<values yValue="5950.1" />
</valueLine>
<valueLine xValue="36.5">
<values yValue="4200.0" />
</valueLine>
...
<columnHeader zValue="2">
</columnHeader>
<valueLine xValue="0.0">
<values yValue="10016.1" />
</valueLine>
<valueLine xValue="35.0">
<values yValue="8200.0" />
</valueLine>
...
</valueTable>
</tractiveEffort>
</propulsion>
</engine>
</vehicle>
May I ask you if my understanding is right?
Best regards,
Utah (Yutaka Manchu)
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