Hi Hoofar, Why not try jEPlus+EA (http://www.jeplus.org/wiki/doku.php?id=docs:jeplus_ea:features)? It supports TRNSYS and is based on a proper constrained multi-objective algorithm. The documentation on the website is scant and a bit outdated, though. And, you need to start with jEPlus before moving on to jEPlus+EA. Regards, Yi From: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] On Behalf Of Hemmatabady, Hoofar via TRNSYS-users
Sent: 17 April 2019 23:06
To: TRNSYS users mailing list at OneBuilding.org
Cc: Hemmatabady, Hoofar
Subject: Re: [TRNSYS-users] TRNOPT Thank you for your reply. I dont want to use more than one penalty function and I have at least 5 constraints which define relation between variables (e.g.: x+y+z<10). The penalties that you wrote can be specified in TRNOPT as variable boundaries.
For Multi-objective optimization, I look for something inside GenOpt without the need to specify weight factors.
Regards,
Hoofar
Von: TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org> im Auftrag von leen peeters via TRNSYS-users <trnsys-users@lists.onebuilding.org>
Gesendet: Mittwoch, 17. April 2019 23:23:14
An: TRNSYS users mailing list at OneBuilding.org
Cc: leen peeters
Betreff: Re: [TRNSYS-users] TRNOPT OK, so in an equation writer in TRNSYS you define: P1=or(x<a1,x>a2)*10000000000 P2= or(y<b1,y>b2)*10000000000 P3= or(z<c1,z>c2)*10000000000 And you make an overall cost function: O=a*cost and b* efficiency+P1+P2+P3 then you can play with the values of a and b to see the impact I followed TRNSYS example and defined it the same way. But I have two objective functions (Cost and Efficiency, Multi-Objective). and by constraint I mean relation between variables. something like: X+3*Y+Z<10, which can be added to the objective function as penalty. However, when there are man of these constraints, the penalty method is not trustable. X, Y and Z has minimum and maximum amounts, which are determined in TRNOPT. Regards, Hoofar
How did you define your optimisation function? What doe sit look like? Hi Leen, I can define constraints as penalties in TRNOPT. However, defining penalties instead of constraints does not work when there are many of them. TRNOPT does not have the option for specifying constraints. How can be the constraints defined in TRNSYS file? and What do you mean by adapting optimization function in TRNSYS? Best regards, Hoofar
why not defining the constraints and penalties in your TRNSYS file? That is how I do it. multi-objectives is again something I do by adapting my optimisation function in TRNSYS The last one ... you should try. I have not yet tested that. Genopt calls TRNSYS and then TRNSYS calls EES. If it is possible, you might have to be really careful with the location of your files. Best is to start with a working TRNOPT example. Then add a link to a small routine in EES and build up from there. Dear all, I have the following questions regarding optimization procedure in TRNSYS: 1) How can I define optimization constraints in TRNOPT? (a method is using penalty functions but It does not work for me as I have multiple constraints) 2) Is it possible to do Multi-objective optimization in TRNOPT? if yes, how? 3) Some of my optimization variables come from EES to TRNSYS. Can TRNSYS couple with EES and GenOpt simultaneously? Best regards, Hoofar _______________________________________________
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