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Ryosuke S avatar image
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Ryosuke S asked Jason Lightfoot commented

Keeping the Forks in specified distance

I have two forks controlled with A* and I want to keep the distance of the forks in 3 meters if it gets close. I plan to use the Agent, however when I do that, the fork keeps going around the target slot and never arrives at target position. How do I set in this case? Do I use proximity?

FloorStorage_Oneway_Agent.fsm

FlexSim 20.1.3
flexsim 20.1.3agent moduleforklift movement
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Jason Lightfoot avatar image Jason Lightfoot ♦♦ commented ·

Hi @Ryosuke S, was Jeanette F's answer helpful? If so, please click the red "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always unaccept and comment back to reopen your question.

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Jeanette F avatar image
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Jeanette F answered Jeanette F commented

Yes, I would use proximity.

Here is a video that goes over Agent systems well. Minute 12:02 goes over what you might be specifically looking for with the Agent Proximity Behavior, but that example model starts on minute 7:49.

Here is the post with the example models shown in the video for you to reference if needed.

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Ryosuke S avatar image Ryosuke S commented ·

@Jeanette F I did go though the video and the samples you raised for me, but I don't know which should I use to get to the goal. Why would you say you would use proximity? I set proximity, but forks gets closer than 3m which I set to avoid.

FloorStorage_Oneway_Agent2.fsm

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Jeanette F avatar image Jeanette F ♦♦ Ryosuke S commented ·

You used the code from the broad phase of the example model. The broad phase only was meant to slow the AGV's. The narrow phase will stop the AGV's.

Here is your model with the narrow phase code modified so the transporter furthest from the queue is the one that stops.

I notice that when a transporter is stopped it does not have an allocated node on the A* grid until it resumes its previous task. This makes it possible for the moving transporter to drive over the other. I am still looking for solutions but decided to go ahead and share what I had intended you to use from the example model.

floorstorage-oneway-agent2_1.fsm


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Ryosuke S avatar image Ryosuke S Jeanette F ♦♦ commented ·

@Jeanette F Thank you for your support. Yes, I have noticed that transporter drive over the other. I hope there is a solution to prevent this. Also, I noticed that the divider is being ignored in certain situation. I'm a little puzzled with this behavior.

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