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Questions - gekko

List handling in GEKKO python

i'm currently working on a model of a distillation flask for a university project, the phisical problem is described by a DAE system, and i'm trying to solve it using GEKKO. I'm facing a problem with ...
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Patrick23

python

arrays

list

differential-equations

gekko

python

arrays

list

differential-equations

gekko

Votes: 0

Answers: 1

Latest Answer

There are two different methods for obtained the value of zv. Option 1: Initialization Calculation The first method is to use floating point numbers to obtain a single calculation that can be used for...
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John Hedengren

GEKKO: Get maximum value of list of Intermediates

I am working on a problem where I have defined several lists of Intermediates. One of my constraints depends on obtaining the maximum and minimum values of one of these lists of Intermediates. As far ...
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Ryan L

gekko

Votes: 0

Answers: 1

Latest Answer

The gekko built-in max2 and max3 functions are suited to the task of finding a maximum or minimum from a list if two variables are compared with each loop through the list. These functions only allow ...
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John Hedengren

How can I force initial conditions for optimal control problem in Gekko?

How can you fix initial conditions in Gekko?? I am pretty new to Gekko still and am working on optimizing the AOA and bank angles for a shuttle-type reentry vehicle to maximize cross-range. The EOMs ...
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Jacob Olsen

ode

nonlinear-optimization

gekko

Votes: 0

Answers: 1

Latest Answer

Okay looks like it was a simple fix. I realized that where I define the first state, radius, I was using a m.param() to define the variable. So I changed rad = m.Var(value= Re) # radius, m to...
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Jacob Olsen

GEKKO: Error in syntax of function string

I'm having trouble understanding an error message I'm getting from my GEKKO model. For context, this model is supposed to optimize the gas spring force and dimension parameters of a gas-spring assiste...
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Ryan L

gekko

Votes: 0

Answers: 1

Latest Answer

One way to locate the error is to open the run directory and inspect the text model file gk_model0.apm. Model Constants i0 = 45.0 i1 = 0.6666666666666666 i2 = 0 i3 = 250.0 i4 = 2 ...
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John Hedengren

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