Hello, the HBEFA-based emission Model is a function of vehicle speed and vehicle acceleration. It is a polynomial of degree 3 in speed and of degree 2 in acceleration (and there is arcsin thrown in for reasons someone else will have to explain). You can find the function compute() in src/utils/common/HelpersHBEFA.h Soon, there will be another emission model available based on PHEM. regards, Jakob
2014/1/18 <[email protected]> > Hi All, > > Sorry, two questions in one day! > > Am I right in assuming the fuel model used is just linear against speed, > without factoring in acceleration at all? From the wiki wording ( > http://sumo-sim.org/wiki/Models/Emissions/HBEFA-based) I wasn't quite > sure, but got that impression too? > > The attached graph is a vehicle following a slower vehicle on the > motorway. When it gets too close, the AI reduces its speed, until the > vehicle ahead clears its immediate collision volume, at which point it > resumes the old speed. > > The problem is, it just looks like linear fuel consumption? From the > difference between the traci speed change calls, I'd expect this to hit max > acceleration value, and therefore higher fuel consumption because of that > high acceleration. But fuel consumption only seems to increase with speed? > > Is the model customisable in your code at all? I don't mind that what > changes I'd make might not be totally valid, would just like to capture > some indication of extreme acceleration vs more controlled. > > The only alternative I can think of is to calculate acceleration on the > Java side after traci, but that doesn't really seem the right place.. > though it might work for my purposes I guess. > > Thanks! > > > > > ------------------------------------------------------------------------------ > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > Learn Why More Businesses Are Choosing CenturyLink Cloud For > Critical Workloads, Development Environments & Everything In Between. > Get a Quote or Start a Free Trial Today. > > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk > _______________________________________________ > sumo-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-user > > ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
