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Regarding Sequence Optimisation

Creator
Creator

Dear Community Memeber,

 

Hello. I have created a model in Tecnomatix which is actually a production facility. I have a production order and I want to optimize it using GA. The optimisation has to be done based on the setup times for different types of products. Can you kindly help me out. Thanks in advance !

5 REPLIES 5

Re: Regarding Sequence Optimisation

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor
as a first step you should include the setup times into your model
as a second step check the examples in the example collection of plant simulation (tools- genetic algorithm...) and the documentation of the GA tool in the help
Steffen Bangsow
freelance simulation specialist  
web: www.bangsow.eu
mail: steffen@bangsow.net

Re: Regarding Sequence Optimisation

Creator
Creator

Hi Steffe.

 

I inserted the setup times and also tried to do the sequence optimisation as per the example given. I still cannot perform optimisation. Can you kindly provide your further help.

 

Regards,

Nisarg.

Highlighted

Re: Regarding Sequence Optimisation

Siemens Phenom Siemens Phenom
Siemens Phenom

Hello Nisarg,

the configuration of the GAwizard is correct.

But the model is not ready for an optimization.

At first you need a terminating simulation, such that your endSim method is called.

I reduced the end time of the eventcontroller, such that the fitness TotalSetupTime is calculated.

But you should consider the reason of the dead lock in your model, but this is another story.

Note that the station Cutting has no setup operations. I added a setup time.

If the fitness is 0 then the genetic algorithms cannot work.

Maybe add 1 to your fitness such that this condition is satisfied.

The attached model for Plant Simulation 13.0 contains the mentioned changes.

Regards,

Peter

 

 

Re: Regarding Sequence Optimisation

Creator
Creator

Hello Peter,

 

First of all thank you for your kind reply. But unfortunately I am not able to perform the simulation. Can you kindly let me know how can I setup my model for simulation ?

 

Regards,

Nisarg.

Re: Regarding Sequence Optimisation

Siemens Phenom Siemens Phenom
Siemens Phenom

Hello Nisarg,

your model does not terminate. If you set the end time of the Eventcontroller to 6:07:00

then the model terminates and the optimization is possible. 

Plant Simulation 13 contains a small example for the optimization of setup times, which can be opened via the Start page.

Category: Tools, Topic: Genetic algorithm, Example Introduction. Both stations use a setup matrix.

I recommend to simplify your model, such that a larger simulation duration is possible.

Regards,

Peter