How to confine the movement of AGVs?

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Liam Chiu asked Jul 25, '23 Liam Chiu commented Jul 28, '23

How to confine the movement of AGVs?

Hi,

I am not familiar with the use of AGVs, and I would like to know if there is a way to restrict AGVs to specific areas. In my model, I have two different areas. I have divided the AGVs in the two areas into two groups: "AREA1_AGV" and "AREA2_AGV". I want the former to only move in area 1, and the latter to only move in area 2. However, I would like the AGVs in the two areas to be able to assist each other when the number of items in Queue1 or Queue3 exceeds 50.

Thank you for your help.

agvv.fsm

Software Version:

FlexSim 22.2.0

agv agvnetwork agv paths

1690273809410.png (84.4 KiB)

agvv.fsm (145.8 KiB)

Answer 1 · 2023-07-25T16:20:21Z

Julie Weller answered Jul 25, '23 Liam Chiu commented Jul 28, '23

Hi @Liam Chiu! I would create 3 AGV templates with different lists, one for the first area, one for the second area and the third for the combined areas. On the combined area one, add a wait for event or event triggered source that samples queue 1 and queue3 and waits for content change like this

That way it will only fire when needed. For the other two you could also add a wait for event that waits until it decreases below 30 so all 3 process flows are never going at once.

1690301954211.png (34.2 KiB)

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Liam Chiu commented · Jul 25, 2023 at 05:03 PM

Hello @Julie Weller! I still find myself somewhat perplexed regarding the method to confine an AGV's operations within a predetermined area. If feasible, would you be able to present a gif or a sample model for clarification?

Much appreciated!!

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Julie Weller Liam Chiu commented · Jul 27, 2023 at 09:47 PM

Hi @Liam Chiu! I spent a while working on your model and I find myself perplexed that you're using the AGV templates at all. The AGV template especially that you were using is unnecessarily complex. You could definitely use my first answer to modify the template but it would take a pretty deep understanding of AGV's and frankly it's easier to just create a simpler process flow.

I ended up using a much simpler process flow:

Essentially it pulls from lists and when one of the queues reaches 50 it starts helping that queue. You might have to tweak it to get the behavior you specifically want because when both queues reach over 50 the AGV's just essentially switch tracks. Here's the model:

agvv (1).fsm

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1690494310387.png (79.2 KiB)

agvv-1.fsm (55.0 KiB)

Liam Chiu Julie Weller commented · Jul 28, 2023 at 03:28 AM

Hi @Julie Weller Thank you for taking the time to help me with this issue~~!!

I use such a complex template because my real model has tens to hundreds of bays. The method you provided seems difficult to scale to larger models because I need to set up a process for each bay when my model is quite complex. This makes it quite difficult to build the model.

However, I am very grateful for the method you provided.

Thank you again for your time and help. :)

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