How to avoid collision when AGV is pushing trailers (60+)?

[jhhenb]

[ FlexSim 22.2.2 ]

There are multiple paths, crossovers and stations in between two points P1 and P2. Multiple Trains with trailers (60+) are traveling in between P1 and P2. Few Trains are pulling the trailers and few are pushing the trailers.

How to avoid collisions?

When Trains are pulling trailers then it allocate Control Points and Control Areas, so issues of collision is not so big.

But, when Trains are pushing trailers then trailers moves ahead of AGV. So, it does not allocate Control Points and Control Areas on which trailers are either moving or passed.

@anthony.johnson, tagging you as I tagged you in two similar issues few minutes ago.

tagging @Joerg Vogel @Jason Lightfoot

[jhhenb · Accepted solution]

One way of avoiding collision is to use "Zone". Challenge in using "Zone" for this kind of scenarios is that its complexity increases multifold by increasing number of crossovers between tracks.

[joerg_vogel_HsH]

Points gets allocated.

AGV trailer stopps at last available Point.

60 Trailers attached.

[jhhenb]

Yes, AGV stops at last available point and try to allocate next CP/CA to reach its final destination.

But, AGV (with 60+ trailers) doesn't behave like this if it has to stop some where in the system for some process and there are other AGVs (with 60+ trailers) running on parallel tracks and crossovers and Unfortunately, few crossovers are placed where AGV (with 60+ trailers) has to stop.

kindly check the image for details. There is a private question related to this scenario.

[joerg_vogel_HsH]

The GIF shows an AGV pushing 60 Trailers.AGV_multiple_trailer_to_push.fsm

[jhhenb]

Yes, that could be another way of modeling the scenario.

I have used Control Area instead of Control Point in between since there are multiple crossovers nearby due to which other train must not come to there if a Train has already laying somewhere on the track. And, somehow AGV was not allocating the Control Areas.

kindly check below question for details:

https:// answers.flexsim.com/questions/128868/how-to-switch-the-role-of-driver-for-two-or-more-a.html

My intention was to find best way to model the scenario so that flexibility and agility of the model for what-if scenarios can be enhanced.

[joerg_vogel_HsH]

@OJé Jhhen, do you build your model upon Railworks, a 3rd party module from FlexSim Brasil? If you haven't done it, perhaps it would be worth to look at this module, because it is designed to build railway networks.

[Jeanette_Fullmer]

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