topic Re: Crane Collision Avoidance in FlexSim Forum

Crane Collision Avoidance

michael_c18 — Wed, 29 Mar 2023 16:43:11 GMT

[ FlexSim 23.0.5 ]

RSI_Dual_Crane_Test.fsmI have a basic question regarding using crane collision avoidance using cranes. I have two overhead bridge cranes on a common set of rails (200 ft x 80 ft x 40 feet high). I have been able to represent the cranes using 2 cranes in 3D object modelling but the cranes cross over each other. I have reviewed the old examples in cranecollisionavoidance.fsm from 2017 - I am able to run this sample model and see that there is a crane collision detect event that moves the "other crane" out of the way. However, I am unclear how to incorporate this code into my model. I am looking for as simple a mechanism to keep the cranes from crossing over each other in the mode. I have attached my basic model with 2 cranes but no collion detection / avoidance.

Re: Crane Collision Avoidance

moehlmann_fe — Thu, 30 Mar 2023 07:29:38 GMT

The linked post contains a newer example model that replaces the old collision detection mechanic with the proximity agent system that superceded it a couple of years ago.

https://answers.flexsim.com/questions/100306/crane-collision-logic-with-agent-system.html

The proximity system works in a radius around the object, so the logic first checks if the distance along the relevant axis is below the minimum. It then does some checks whether the current crane has to move out of the way (based on priority and if such a task is already given to one of the cranes). To move out of the way the crane is given a preempting task sequence.

Re: Crane Collision Avoidance

Jeanette_Fullmer — Wed, 05 Apr 2023 20:03:27 GMT

Hi @Michael C18, was Felix Möhlmann's answer helpful? If so, please click the "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.

Re: Crane Collision Avoidance

michael_c18 — Wed, 05 Apr 2023 20:14:20 GMT

Thanks helpful but will still need some help on help line to walk me through how to integrate in my model.

Mike

Re: Crane Collision Avoidance

michael_c18 — Wed, 05 Apr 2023 20:15:07 GMT

Yes helpful but will still call th ehelp line to have some walk me through how to integrate this solution to my model.

Re: Crane Collision Avoidance

jason_lightfoot_adsk — Thu, 06 Apr 2023 12:54:18 GMT

Can you be specific about what you're needing help on? You will probably get faster responses on this site by asking specific smaller questions (as new posts) than over-arching general ones.

Re: Crane Collision Avoidance

logan_gold — Thu, 06 Apr 2023 22:02:24 GMT

I was able to help Mike over the phone by talking a little bit through the example model in the linked post. We talked about the Proximity System and the On In Proximity trigger that handles the collision avoidance.

@Michael C18, let us know if you have any more questions.