2p..
Just out of curiosity I did some work last year trying to get results
consistent with those I observed from my own BEV.
The default EV parameters in SUMO were those from the original paper which was
modelling EV bus behaviour. Those values gave very different results from my
observations with a modern EV.
Specifically the two efficiency values were far too low and the
radialDragCoefficient was too high - this latter may be contributing to your
turning variation?
The choice of CFM does not adjust any electricity consumption parameters.
Consumption is derived depending on mass, propulsion/regen efficiency, +/-
acceleration and drag (air and turning) for each model time interval -
independent of the CFM.
When you're looking at different levels of background consumption you'll need
to vary the constantPowerIntake value, though given the sensors/computers in
most EV's today I'd be surprised if the background electrical consumption is
significantly different with autonomous vehicles - the days of lugging a PDP-11
around in the back have long gone! :)
If you're not varying constantPowerIntake the consumption difference may be
down to air drag - the default values for drag and front surface area (for a
bus) have a disproportionate impact for higher speeds.
(Alos if there are mass differences between autonomous/non-autonomous vehicles
that will definitely have a significant impact on electricity consumption.)
cheers
Div
fyi - these were the values I ended up using for my vehicle.
The updated vType aligned with the vehicle specification is as follows:
<vType id="soulEV65" minGap="2.50" maxSpeed="46.0" color="white" accel="3.6"
decel="4.5" sigma="0.0" emissionClass="Energy/unknown">
<param key="airDragCoefficient" value="0.35"/> <!--
https://www.evspecifications.com/en/model/e94fa0 -->
<param key="constantPowerIntake" value="100"/> <!-- observed summer levels -->
<param key="frontSurfaceArea" value="2.6"/> <!-- computed (ht-clearance) *
width -->
<param key="has.battery.device" value="true"/>
<param key="internalMomentOfInertia" value="0.01"/> <!-- guesstimate -->
<param key="maximumBatteryCapacity" value="64000"/>
<param key="maximumPower" value="150000"/> <!-- website as above -->
<param key="propulsionEfficiency" value=".98"/> <!-- guesstimate value
providing closest match to observed -->
<param key="radialDragCoefficient" value="0.1"/> <!-- as above -->
<param key="recuperationEfficiency" value=".96"/> <!-- as above -->
<param key="rollDragCoefficient" value="0.01"/> <!-- as above -->
<param key="stoppingTreshold" value="0.1"/> <!-- as above -->
<param key="vehicleMass" value="1830"/> <!-- 1682kg curb wt + my average 2
passengers / bags --> </vType>
------- Original Message -------
On Monday, August 8th, 2022 at 09:09, Radha Reddy <[email protected]>
wrote:
> Many thanks Mirko, for your information.
>
> My test network is an isolated intersection with each road from the
> intersection being 500meters in length. My intention was how the human-driven
> (Krauss) and Autonomous-driven (ACC) vehicles consume battery electricity.
> The human vehicle exhibits jerky driving behavior while the autonomous
> vehicle utilizes its maximum speed without jerky behavior.
>
> The electricity consumption of ACC is strange that in the straight lane, it
> consumes ~0.57 while turning to the right/left, consuming 20 times extra from
> 10 to 15 (for 3 to 4 seconds, the time required to cross the intersection).
> In Krauss CFM, it is of utmost 5 and recovers some energy when there is a
> jerk.
>
> In the literature, the higher electricity consumption of autonomous vehicles
> is related to the power consumption of sensors and computing for autonomous
> driving. My question is if the ACC has a similar explanation.
>
> Regards
> Radha
>
> On Mon, Aug 8, 2022 at 8:48 AM [email protected]
> <[email protected]> wrote:
>
>> Hi,
>>
>> these are different CFM generating different speed profiles. So it should be
>> expected that electricity consumption may differ. The difference does not
>> sound very big either, as it is in the range of a few % of an average
>> consumption per km. Still depends on how your test network looks like,
>> though.
>>
>> Best regards
>>
>> Mirko
>>
>> -----Original-Nachricht-----
>>
>> Betreff: [sumo-user] Electricity Consumption
>>
>> Datum: 2022-08-06T23:04:43+0200
>>
>> Von: "Radha Reddy" <[email protected]>
>>
>> An: "Sumo project User discussions" <[email protected]>
>>
>> Hello,
>>
>> I have two scenarios in which Battery Electric Vehicles are driven by Krauss
>> CFM (Human driver) and ACC CFM (Autonomous driver). When I compared the
>> electricity consumption results, the ACC-driven vehicles consumed more than
>> the Krauss CFM (between 2 to 7Wh), Is there any explanation for this?
>>
>> Many thanks in advance.
>>
>> Regards
>> Radha
>>
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