Re: [sumo-dev] Miscalculation of Rotational Kinetic Energy, Curvature En

["joerg.schweizer@xxxxxxxx" <joerg.schweizer@xxxxxxxx>]

Thanks Michael for putting your hands on this, and sorry it took time to 
find the file.

It has been quite crucial for the project as the determination of the 
energy consumption has been the main goal.

Hope it gets fixed soon.

Thanks again,

Joerg


On 15/10/20 21:53, Michael Behrisch wrote:
> Hi,
> thanks for the report and sorry for the delay. Unfortunately we have
> several places in the code which calculate energies. I suppose you are
> referring to HelpersEnergy::compute
> https://github.com/eclipse/sumo/blob/master/src/utils/emissions/HelpersEnergy.cpp#L57
> ?
> This function seems to have some problems indeed not only the ones you
> mention but in total it should return power and not energy because the
> time scaling is done outside the function when used as an emission
> model. For the battery device however energy is expected. Sorry for the
> hassle, it is now tracked here: https://github.com/eclipse/sumo/issues/7695
>
> Thanks again for finding out!
>
> Best regards,
> Michael
>
> Am 11.10.20 um 06:40 schrieb Burford Furman:
> > Hello,
> >
> > We are running SUMO ver 1.6.0 under Windows 10, and we just discovered
> > that the SUMO source code is calculating the Rotational Kinetic Energy,
> > the Curvature Energy Loss, and the Constant Auxiliary Energy Demand
> > incorrectly. The SUMO documentation lists the correct equations, but for
> > some reason the source code is not correct in ver 1.6.0. Our findings
> > are summarized below:
> >
> > image.png
> >
> > image.png
> >
> > Thank you.
> >
> > Burford Furman
> >
> > --
> > ************************************************************************************
> > Burford J. Furman
> > Professor
> > Department of Mechanical Engineering
> > San Jose State University
> > One Washington Square
> > San Jose, CA 95192-0087
> > Phone: (408) 924-3817 Email: Burford.Furman@xxxxxxxx
> > <mailto:Burford.Furman@xxxxxxxx>
> > Web page: http://www.sjsu.edu/people/burford.furman/
> > <http://www.engr.sjsu.edu/bjfurman/>
> > ************************************************************************************
> > "We must remember that intelligence is not enough. Intelligence plus
> > character--that is the goal of true education." - Dr. Martin Luther King
> > Jr., 1947
> >
> > "/Instrumental or mechanical science
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> > Vinci
> >
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