Gekko SysId - Temprature System Identification

Question

I am currently working on developing an MPC to optimise the costs of a fridge. Therefore I need a model of my system. For the modelling of the algorithm, I used GEKKO. Now I am trying to identify my system using the function "sysid" also found in GEKKO. I just can't understand how does this function work when not given a model of the system. Furthermore, I don't understand the parameters of this function and the meaning of the given outputs. I sow some examples here: https://apmonitor.com/do/index.php/Main/DataSimulation. This possibility seems promising, I just need a deeper understanding of this function.

I will appreciate any kind of help :)

Answer 1

Here is additional documentation and examples on the system identification function sysid:

• MIMO (Multiple Input, Multiple Output) System Identification
• Arduino TCLab Advanced Control Lab, especially Lab F
• Nonlinear Control with CSTR
• Gekko Documentation: Model Building Functions (sysid)

The sysid function identifies an ARX model. You can use the ARX model in the arx gekko function. Here is some additional documentation on the ARX model.