Proximity agent system does not fire

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Tomi Kosunen asked Nov 4, '20 Jason Lightfoot commented Mar 2, '21

Proximity agent system does not fire

Hi. I have been testing the proximity agent system. My plan is to use it like a photo eye traffic calculator in a AStar model. In most of the cases it seems to work ok but in some cases I don't understand, why the logic doesn't fire (as there is a collision between objects). My guess is that it is somehow connected to the Operator walking too close to the wall. Is there

Pls take a look and run the model attached.

Q1: If the operator moves the pallet to Sink1, why only "TrafficLine3" fires (why TrafficLine1 and TrafficLine2 does not)?

Q2:If the operator moves the pallet to Sink2 (change connection), all the TrafficLines fire ok.

Q3: I have set a Labels to Operator and TrafficLines to calculate the number of enters and exits. Why the Operator's Entry ad Exit logic fires twice as often as the TrafficLines (while TrafficLine gets one entry/exit per operator crossing, the Operator gets two. Except while the operator is returning from Sink2, then it gets only one hit per line).

Q4: Is the proximity agent system reliable enough to be used for the statistics collection or is it only for visualisation purposes?

test_aStar_Agent.fsm

Software Version:

FlexSim 20.2.3

flexsim 20.2.3 proximity agent system

test-astar-agent.fsm (37.0 KiB)

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Jason Lightfoot ♦ commented · Mar 02, 2021 at 02:04 PM

Hi @tomi.kosunen, was jason.lightfoot'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.

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Answer 1 · 2020-11-05T14:59:01Z

Jason Lightfoot answered Nov 5, '20 Jason Lightfoot commented Nov 9, '20

The proximity is evaluates as a radius from the centre point of the agent object and you can see in the first cases the operator walks around the circle drawn for the traffic line.

test-astar-agent_jl.fsmIn the attached model I've added the code to change the color of the neighbor.

operatorwalksaroundneigborsradius.png (77.8 KiB)

test-astar-agent-jl.fsm (37.7 KiB)

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Tomi Kosunen commented · Nov 09, 2020 at 09:50 AM

Thanks @jason.lightfoot . While I tested the model, I noticed that the Operator actually fires the proximity logic but the Traffic line does not. That's why your edition of the model seems to work (as you use the Operators neighbour to set the colour etc.). My next question is, why the Operator fires and the Traffic line does not fire the proximity logic even they have the same setup? Sometimes both fire - then I would hit twice and potentially get wrong statistics.

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Jason Lightfoot ♦ Tomi Kosunen commented · Nov 09, 2020 at 10:22 AM

Each object evaluates if other members within the radius shown. As you can see in the picture, the operator is not inside the radius of the traffic line, so its logic does not fire.

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Tomi Kosunen Jason Lightfoot ♦ commented · Nov 09, 2020 at 10:28 AM

Yes, you are right. Thanks. Now I got it. Just one more: Why the proximity entry fires twice, while the operator crosses the Traffic line? (At 2.60 and 3.20 sec.) You can add line "print(Model.time,":",myName,"-",neighbor.object.name);" to the proximity entry to see it.

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