The sumo-controlled vehicles are using the default model with stochastic components. This will result in divergent vehicle behavior when running a different simulation sequence with a different number / ordering of random number generator calls. For details, see https://sumo.dlr.de/docs/Simulation/Randomness.html
regards, Jakob Am Mo., 13. Apr. 2020 um 15:08 Uhr schrieb Branka Mirchevska < [email protected]>: > Hello, > > I'm trying to run 2 predefined Sumo scenarios one after the other (scenario > ids 10_0, and 20_0). > They contain 10 and 20 Sumo controlled vehicles each, and I place my > remotely controlled vehicle at a certain position in both to drive among > them. > The problem is the following: > when I run scenario 10 and then scenario 20 after it, the behavior is > different than when I run scenario 20 right away. > > here is a demonstration: > > Only scenario 20_0: > _________________________________ > > > Scenario ID: 20_0 > ---------------------------------------- time-step: 0 > EGO lane pos and speed : 100.0 , 8.0 > x, y, angle, speed for EGO to execute: 101.530884567 5.19671627088 > 90.7360694615 8.10524126657 > HUMAN_19 lane position and speed : 121.0 10.0 > ---------------------------------------- time-step: 1 > EGO lane pos and speed : 101.530884567 , 8.10524126657 > x, y, angle, speed for EGO to execute: 103.100752622 5.1765673393 > 91.6889555588 8.39699835768 > HUMAN_19 lane position and speed : 123.054754372 10.2737718593 > ---------------------------------------- time-step: 2 > ... > > > First scenario 10_0 and then 20_0: > __________________________________ > > Scenario ID: 20_0 > ---------------------------------------- time-step: 0 > EGO lane pos and speed : 100.0 , 8.0 > x, y, angle, speed for EGO to execute: 101.530884567 5.19671627088 > 90.7360694615 8.10524126657 > HUMAN_19 lane position and speed : 121.0 10.0 > ---------------------------------------- time-step: 1 > EGO lane pos and speed : 101.530884567 , 8.10524126657 > x, y, angle, speed for EGO to execute: 103.100752622 5.1765673393 > 91.6889555588 8.39699835768 > HUMAN_19 lane position and speed : 123.093816682 10.4690834098 > ---------------------------------------- time-step: 2 > … > > You can see that the behavior of HUMAN_19 is slightly different in > time-step > 1 event though EGO doesn’t change its remote control parameters. > > I have included a small example in the .zip folder attached. If you run: > > python2.7 small_example/src/run_scenario.py, > > first scenario 10_0 then scenario 20_0 will be executed, one after > another. > > If you comment in line 63 (#scenario_ids = ['20_0']) in run_example.py, > only > scenario 20_0 will be executed. > > After running the two options, you will be able to see the above output, > where in time-step 1 ‘HUMAN_19’ behaves differently even though the > environment is exactly the same. > > Do you have any clue why? > > Thanks! > > Best, > Branka > > small_example.zip > < > http://sumo-user-mailing-list.90755.n8.nabble.com/file/t361/small_example.zip> > > > > > > -- > Sent from: http://sumo-user-mailing-list.90755.n8.nabble.com/ > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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