AGV Network - Wrong Accumulation After Redirect

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Iago MF asked Sep 22, '23 Iago MF edited Feb 9, '24

AGV Network - Wrong Accumulation After Redirect

Hi,

when creating AGV models with accumulation paths, I often encounter issues when using the redirect function or interrupting and reassigning missions for the AGVs. In this models, the AGVs sometimes detect accumulation with other AGVs that are on completely separate paths.

In the model I'm showing here, the problem is not as severe, but it can be observed that when the redirect() method is applied to the AGV during the turning kinematics, the AGV resets a complete turn and then does not correctly respect the accumulation distance. I hope this helps identify the problems when redirecting or interrupting AGV tasks, as I have found in the models that if they don't have to apply turning times, I don't encounter any issues.

Thanks in advance!

Without redirect:

After redirect (The AGV stops only because of the allocation limit; if there is no limit, the AGV overtakes the one that is stopped):

23.2 Redirect.fsm

Software Version:

FlexSim 23.2.1

agv agvnetwork accumulation redirect

accumulation-without-redirect.gif (2.0 MiB)

accumulation-after-redirect.gif (1.9 MiB)

232-redirect.fsm (37.7 KiB)

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Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Jason Lightfoot ♦♦ commented · Sep 25, 2023 at 05:24 PM

Moderators: Same issue with preempting task sequence to do the same thing.

232-redirect_jl.fsm

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232-redirect-jl.fsm (38.4 KiB)

Iago MF commented · Nov 06, 2023 at 10:24 AM

Hi,

this is still happening in 24.0.0 Beta

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Jason Lightfoot ♦♦ Iago MF commented · Nov 06, 2023 at 11:07 AM

Thanks. I can't see anything in the release notes that would suggest it has been fixed - usually comment to be added to this question when it is.

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Iago MF Jason Lightfoot ♦♦ commented · Nov 06, 2023 at 02:36 PM

Then I'll keep waiting. Thanks Jason!

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Iago MF commented · Feb 09 at 12:48 PM

Hi,

In another model I have encountered the same issue when an AGV must take a diversion but its being redirected, without involving any rotation. I observed that the distance is already less than that indicated in the "Path Entry" in the accumulation configuration. Upon closer inspection in that case, I have noticed that the accumTransversal nodes lose the information of the LeadingEdge since, for the AGV, that edge was already on the path before the redirect. This is happening also in this case when AGV is rotating to a diversion path.

Perhaps this information can help in detecting and solve the error.

Meanwhile, is there any way to refresh this information? I have tried refreshing the task with a delay, stop and resume, and also attempting to force the value with setsdtvalue before, but I can't get the accumulation information to be updated correctly for both the AGV and the path it is on.

Before redirect, leading edge is on the sdt node coupled with the diversion path before redirect:

After redirect, when AGV continues traveling it keeps de sdt node coupled with the main path but without including the leading edge:

Thanks.

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afterredirect.jpg (62.5 KiB)

Answer 1 · 2023-09-26T20:39:11Z

Jeanette F answered Sep 26, '23 Iago MF commented Sep 27, '23

Hello @Iago MF,

This has been emailed into the development team.

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Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Iago MF commented · Sep 27, 2023 at 06:20 AM

Thanks Jeanette!

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