[TRNSYS-users] Problem with GenOpt and TRNOpt: discrete variable

[Timothy McDowell]

Alexis -

I have usually seen this when the TRNSYS simulation is returning an error
and not completing its simulation.  Check the *.lst file from the TRNSYS
run and see if there is an error there.

Regards,

Tim





----------------------------------
Timothy McDowell
Executive Vice President
Thermal Energy System Specialists, LLC
22 N. Carroll St, Suite 370
Madison, WI 53703
Phone: 608-274-2577
Fax: 608-278-1475

----- Original Message -----
From: "Alexis Fabre (Trainee 3E)" <alexis.fabre at 3e.eu>
Sent: Wed, September 29, 2010 9:24
Subject:[TRNSYS-users] Problem with GenOpt and TRNOpt: discrete variable




















Dear TRNSyst user,



I try to optimize a system with TRNOpt. I have the
total cost of my system to minimize depending on 2 variables (one continuous
and one discrete which can take 3 values).

When I run TRNOpt with my system which depends only
on the continuous variable (for instance with Hooke-Jeeves) it works really
well, great.

But when I try to add the dependence with de second
variable (i.e the discrete variable and the continuous variable) it does not
work.

I received the error on the GenOpt window:

“GenOpt terminated with error.

See logfile for further information”



I received the error when I used the algorithm with these
parameters:

Hybrid for Continuous and Discrete

NeighborhoodTopology = gbest

NeighborhoodSize = 1

NumberOfParticle = 0

NumberOfGeneration = 0

Seed = 0

CognitiveAcceleration = 0.5

SocialAcceleration = 0.5

MaxVelocityGainContinuous = 0

MaxVelocityDiscrete = 0.5

ConstrictionGain = 0.5

MeshSizeDivider = 2

InitialMeshSizeExponent = 0

MeshSizeExponentIncrement = 1

NumberOfStepReduction = 4



I attach the logfile to this mail and the file where
there are all the parameters for TRNOpt



I tried other algorithms and I received the same
error except for the “parametric” where it worked but with some
errors at the beginning which I paste at the end of this mail.

I do not know which algorithm is the best one to use
when I want to optimize a system with a continuous and a discrete variable
(the
discrete variable has to take three values: 1,2,3)

Maybe somebody has an idea which can help me to find
the solution of my problem?



Thanks a lot



Alexis Fabre





**** Warning ****

Simulation 1: Exception in evaluating x = ( 20.0; 0).



Exception in executing the simulation program



Current command String: 'C:\Program
Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program
Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n
/WAIT '.

Exception message:



Error in executing the simulation program

Exit value of the simulation program: 1

Current command String              : 'C:\Program
Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program
Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n
/WAIT '.

Error stream of simulation program  : Simulation
program did not return an error stream.





**** Info ****

Simulation 2: Caught 'java.lang.Exception' with message:


Exception in executing the simulation program



Current command String: 'C:\Program
Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program
Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n
/WAIT '.

Exception message:



Error in executing the simulation program

Exit value of the simulation program: 1

Current command String              : 'C:\Program
Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program
Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n
/WAIT '.

Error stream of simulation program  : Simulation
program did not return an error stream.



   Try to evaluate simulation a second time.



**** Warning ****

Simulation 2: Exception in evaluating x = ( 44.0; 0).



Exception in executing the simulation program



Current command String: 'C:\Program
Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program
Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n
/WAIT '.

Exception message:



Error in executing the simulation program

Exit value of the simulation program: 1

Current command String              : 'C:\Program
Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program
Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n
/WAIT '.

Error stream of simulation program  : Simulation
program did not return an error stream.

















  Alexis Fabre


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----- End of original message -----