Inquiry about Implementing LQR Control with Simulink in OpenFAST

[simon918]

Dear OpenFAST Development Team,

I hope this message finds you well.

I am currently exploring how to integrate an LQR (Linear Quadratic Regulator) control algorithm with OpenFAST. As a newcomer to using Simulink for this purpose, I find myself uncertain about where to begin. I would like to ask if there is any relevant documentation or user guide that can help me understand the implementation steps.

Here is the general approach I am attempting, and I would appreciate it if you could kindly let me know whether this is a correct and feasible method:

I plan to introduce the LQR controller into the Simulink linear system corresponding to the OpenFAST dynamics model. Under different operating conditions, the controller will generate different control forces as output. These control force signals are then fed back into the FAST model. In this way, the LQR controller can indirectly influence the behavior of the FAST system.

Any guidance, documentation, or suggestions from your team would be greatly appreciated.

Best regards

[dzalkind]

I suggest starting with the simple OpenFAST-Simulink examples here: https://github.com/OpenFAST/openfast/tree/main/glue-codes/simulink/examples

While the ROSCO Simulink controller isn't fully supported anymore, it could be a helpful guide for setting up your own controller: https://github.com/NREL/ROSCO/tree/main/Matlab_Toolbox/Simulink

I hope this helps.

Best, Dan