topic Re: Pull from list based on Travel Distance in FlexSim Forum

Pull from list based on Travel Distance

ssrdh — Tue, 01 Aug 2023 19:46:02 GMT

[ FlexSim 22.2.4 ]

Hi,

I have a Model consisting of a TE and Racks and using A star. I want the TE to pull items based on nearest "travel" distance rather than straight line distance from Puller. Is there a way to do this in flexsim?

In the attached model, I have the Pull from list based on Straight line distance. If I add one-way mandatory paths, how can I pull items based on travel distance rather than straight line distance from Puller?

Pull_by_travel_distance.fsm

Re: Pull from list based on Travel Distance

carter-walch — Tue, 01 Aug 2023 20:08:56 GMT

Hi @Aditya S2 ,

You can use the distancetotravel command to accomplish this. If the task executer is on a network like Astar it returns the travel distance along the network

Re: Pull from list based on Travel Distance

carter-walch — Tue, 01 Aug 2023 21:15:03 GMT

Here is an updated model implementing distance to travel: pull-by-travel-distance.fsm

Notice how even though the item in Rack2 has closer straight-line distance, the task executer takes the item that has the shortest travel distance which is in Rack1.

Re: Pull from list based on Travel Distance

ssrdh — Tue, 01 Aug 2023 22:26:14 GMT

This works! Thank you!

Re: Pull from list based on Travel Distance

carter-walch — Tue, 01 Aug 2023 22:28:11 GMT

You're welcome!

Re: Pull from list based on Travel Distance

ssrdh — Tue, 01 Aug 2023 22:29:18 GMT

A follow up question I have is, if I have collision avoidance turned on in A star, does the traveldistance account for any blockage time a TE would face if there are multiple TEs in the model?

If yes, can the pull query be changed to pull by travel time rather than travel distance?

Re: Pull from list based on Travel Distance

carter-walch — Tue, 01 Aug 2023 23:01:30 GMT

Unfortunately no, the travel distance will remain the same despite being blocked by another TE because it is just based on the distance along the network. However, an AGV system might be better at accomplishing this task receiving tasks and finding the shortest available path to get there.

Re: Pull from list based on Travel Distance

hh_2105 — Wed, 07 May 2025 02:53:00 GMT

Hi Carter. With regards to pull from list by travel distance by operators on a network node, what is the expression for this?